{"id":36609,"date":"2025-05-11T07:00:59","date_gmt":"2025-05-10T23:00:59","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/36609.html"},"modified":"2025-05-11T07:00:59","modified_gmt":"2025-05-10T23:00:59","slug":"%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%bf%90%e7%bb%b4%e5%ae%9e%e6%88%98%ef%bc%9a%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%a2%86%e5%9f%9f%e7%9a%84%e6%88%90%e5%8a%9f%e7%bb%8f%e9%aa%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/36609.html","title":{"rendered":"\u670d\u52a1\u5668\u8fd0\u7ef4\u5b9e\u6218\uff1a\u670d\u52a1\u5668\u9886\u57df\u7684\u6210\u529f\u7ecf\u9a8c"},"content":{"rendered":"<h2>\u670d\u52a1\u5668\u8fd0\u7ef4\u5b9e\u6218&#xff1a;\u670d\u52a1\u5668\u9886\u57df\u7684\u6210\u529f\u7ecf\u9a8c<\/h2>\n<p>\u5173\u952e\u8bcd&#xff1a;\u670d\u52a1\u5668\u8fd0\u7ef4\u3001\u9ad8\u53ef\u7528\u6027\u3001\u6027\u80fd\u4f18\u5316\u3001\u76d1\u63a7\u544a\u8b66\u3001\u81ea\u52a8\u5316\u8fd0\u7ef4\u3001\u5b89\u5168\u52a0\u56fa\u3001\u707e\u5907\u6062\u590d<\/p>\n<p>\u6458\u8981&#xff1a;\u672c\u6587\u6df1\u5165\u63a2\u8ba8\u670d\u52a1\u5668\u8fd0\u7ef4\u9886\u57df\u7684\u6838\u5fc3\u5b9e\u8df5\u4e0e\u6210\u529f\u7ecf\u9a8c&#xff0c;\u4ece\u57fa\u7840\u67b6\u6784\u8bbe\u8ba1\u5230\u9ad8\u7ea7\u8fd0\u7ef4\u6280\u5de7&#xff0c;\u5168\u9762\u5256\u6790\u5982\u4f55\u6784\u5efa\u7a33\u5b9a\u3001\u9ad8\u6548\u3001\u5b89\u5168\u7684\u670d\u52a1\u5668\u73af\u5883\u3002\u6587\u7ae0\u5c06\u7cfb\u7edf\u6027\u5730\u4ecb\u7ecd\u670d\u52a1\u5668\u8fd0\u7ef4\u7684\u5173\u952e\u73af\u8282&#xff0c;\u5305\u62ec\u6027\u80fd\u8c03\u4f18\u3001\u76d1\u63a7\u4f53\u7cfb\u6784\u5efa\u3001\u81ea\u52a8\u5316\u8fd0\u7ef4\u5b9e\u65bd\u3001\u5b89\u5168\u9632\u62a4\u7b56\u7565\u4ee5\u53ca\u707e\u5907\u65b9\u6848\u8bbe\u8ba1&#xff0c;\u5e76\u7ed3\u5408\u5b9e\u9645\u6848\u4f8b\u548c\u4ee3\u7801\u793a\u4f8b&#xff0c;\u4e3a\u8bfb\u8005\u63d0\u4f9b\u53ef\u843d\u5730\u7684\u6280\u672f\u65b9\u6848\u3002<\/p>\n<h3>1. \u80cc\u666f\u4ecb\u7ecd<\/h3>\n<h4>1.1 \u76ee\u7684\u548c\u8303\u56f4<\/h4>\n<p>\u672c\u6587\u65e8\u5728\u4e3aIT\u4e13\u4e1a\u4eba\u5458\u63d0\u4f9b\u670d\u52a1\u5668\u8fd0\u7ef4\u7684\u5168\u9762\u6307\u5357&#xff0c;\u6db5\u76d6\u4ece\u57fa\u7840\u5230\u9ad8\u7ea7\u7684\u8fd0\u7ef4\u6280\u672f\u3002\u6211\u4eec\u5c06\u91cd\u70b9\u8ba8\u8bba\u751f\u4ea7\u73af\u5883\u4e2d\u670d\u52a1\u5668\u8fd0\u7ef4\u7684\u6700\u4f73\u5b9e\u8df5&#xff0c;\u5305\u62ec\u4f46\u4e0d\u9650\u4e8eLinux\/Windows\u670d\u52a1\u5668\u7ba1\u7406\u3001\u6027\u80fd\u4f18\u5316\u3001\u6545\u969c\u6392\u67e5\u548c\u5b89\u5168\u52a0\u56fa\u7b49\u6838\u5fc3\u4e3b\u9898\u3002<\/p>\n<h4>1.2 \u9884\u671f\u8bfb\u8005<\/h4>\n<p>\u672c\u6587\u9002\u5408\u4ee5\u4e0b\u8bfb\u8005\u7fa4\u4f53&#xff1a;<\/p>\n<ul>\n<li>\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u8fd0\u7ef4\u5de5\u7a0b\u5e08<\/li>\n<li>DevOps\u5de5\u7a0b\u5e08\u548cSRE\u5de5\u7a0b\u5e08<\/li>\n<li>\u4e91\u8ba1\u7b97\u67b6\u6784\u5e08\u548c\u6280\u672f\u4e3b\u7ba1<\/li>\n<li>\u5bf9\u670d\u52a1\u5668\u8fd0\u7ef4\u611f\u5174\u8da3\u7684\u6280\u672f\u7231\u597d\u8005<\/li>\n<\/ul>\n<h4>1.3 \u6587\u6863\u7ed3\u6784\u6982\u8ff0<\/h4>\n<p>\u672c\u6587\u9996\u5148\u4ecb\u7ecd\u670d\u52a1\u5668\u8fd0\u7ef4\u7684\u57fa\u7840\u6982\u5ff5&#xff0c;\u7136\u540e\u6df1\u5165\u63a2\u8ba8\u5404\u9879\u5173\u952e\u6280\u672f&#xff0c;\u6700\u540e\u901a\u8fc7\u5b9e\u9645\u6848\u4f8b\u5c55\u793a\u5982\u4f55\u5c06\u8fd9\u4e9b\u6280\u672f\u5e94\u7528\u4e8e\u771f\u5b9e\u573a\u666f\u3002\u6bcf\u4e2a\u7ae0\u8282\u90fd\u5305\u542b\u7406\u8bba\u8bb2\u89e3\u548c\u5b9e\u8df5\u6307\u5bfc&#xff0c;\u786e\u4fdd\u8bfb\u8005\u80fd\u591f\u5b66\u4ee5\u81f4\u7528\u3002<\/p>\n<h4>1.4 \u672f\u8bed\u8868<\/h4>\n<h5>1.4.1 \u6838\u5fc3\u672f\u8bed\u5b9a\u4e49<\/h5>\n<ul>\n<li>SLA(\u670d\u52a1\u7b49\u7ea7\u534f\u8bae)&#xff1a;\u670d\u52a1\u63d0\u4f9b\u5546\u4e0e\u5ba2\u6237\u4e4b\u95f4\u5b9a\u4e49\u7684\u670d\u52a1\u8d28\u91cf\u6307\u6807<\/li>\n<li>MTTR(\u5e73\u5747\u4fee\u590d\u65f6\u95f4)&#xff1a;\u7cfb\u7edf\u4ece\u6545\u969c\u5230\u6062\u590d\u6240\u9700\u7684\u5e73\u5747\u65f6\u95f4<\/li>\n<li>QPS(\u6bcf\u79d2\u67e5\u8be2\u6570)&#xff1a;\u7cfb\u7edf\u6bcf\u79d2\u80fd\u591f\u5904\u7406\u7684\u8bf7\u6c42\u6570\u91cf<\/li>\n<li>IOPS(\u6bcf\u79d2\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c)&#xff1a;\u5b58\u50a8\u8bbe\u5907\u6bcf\u79d2\u80fd\u591f\u5b8c\u6210\u7684\u8bfb\u5199\u64cd\u4f5c\u6570\u91cf<\/li>\n<\/ul>\n<h5>1.4.2 \u76f8\u5173\u6982\u5ff5\u89e3\u91ca<\/h5>\n<ul>\n<li>\u84dd\u7eff\u90e8\u7f72&#xff1a;\u4e00\u79cd\u65e0\u505c\u673a\u90e8\u7f72\u6280\u672f&#xff0c;\u901a\u8fc7\u7ef4\u62a4\u4e24\u5957\u751f\u4ea7\u73af\u5883\u5b9e\u73b0\u5e73\u6ed1\u5207\u6362<\/li>\n<li>\u91d1\u4e1d\u96c0\u53d1\u5e03&#xff1a;\u9010\u6b65\u5c06\u65b0\u7248\u672c\u63a8\u9001\u7ed9\u90e8\u5206\u7528\u6237&#xff0c;\u4ee5\u964d\u4f4e\u98ce\u9669<\/li>\n<li>\u6df7\u6c8c\u5de5\u7a0b&#xff1a;\u901a\u8fc7\u6545\u610f\u5f15\u5165\u6545\u969c\u6765\u6d4b\u8bd5\u7cfb\u7edf\u5f39\u6027\u7684\u5b9e\u8df5<\/li>\n<\/ul>\n<h5>1.4.3 \u7f29\u7565\u8bcd\u5217\u8868<\/h5>\n<ul>\n<li>HA&#xff1a;\u9ad8\u53ef\u7528\u6027(High Availability)<\/li>\n<li>LB&#xff1a;\u8d1f\u8f7d\u5747\u8861(Load Balancing)<\/li>\n<li>CDN&#xff1a;\u5185\u5bb9\u5206\u53d1\u7f51\u7edc(Content Delivery Network)<\/li>\n<li>IDC&#xff1a;\u4e92\u8054\u7f51\u6570\u636e\u4e2d\u5fc3(Internet Data Center)<\/li>\n<\/ul>\n<h3>2. 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<\/p>\n<p>         <span id=\"L-L-A-B\" class=\"edgeLabel L-LS-A&#039; L-LE-B\"><\/span> <\/p>\n<p>         <span id=\"L-L-A-C\" class=\"edgeLabel L-LS-A&#039; L-LE-C\"><\/span> <\/p>\n<p>         <span id=\"L-L-A-D\" class=\"edgeLabel L-LS-A&#039; L-LE-D\"><\/span> <\/p>\n<p>         <span id=\"L-L-A-E\" class=\"edgeLabel L-LS-A&#039; L-LE-E\"><\/span> <\/p>\n<p>         <span id=\"L-L-A-F\" class=\"edgeLabel L-LS-A&#039; L-LE-F\"><\/span> <\/p>\n<p>         <span id=\"L-L-A-G\" class=\"edgeLabel L-LS-A&#039; L-LE-G\"><\/span> <\/p>\n<p>         <span id=\"L-L-B-B1\" class=\"edgeLabel L-LS-B&#039; L-LE-B1\"><\/span> <\/p>\n<p>         <span id=\"L-L-B-B2\" class=\"edgeLabel L-LS-B&#039; L-LE-B2\"><\/span> <\/p>\n<p>         <span id=\"L-L-B-B3\" class=\"edgeLabel L-LS-B&#039; L-LE-B3\"><\/span> <\/p>\n<p>         <span id=\"L-L-C-C1\" class=\"edgeLabel L-LS-C&#039; L-LE-C1\"><\/span> <\/p>\n<p>         <span id=\"L-L-C-C2\" class=\"edgeLabel L-LS-C&#039; L-LE-C2\"><\/span> <\/p>\n<p>         <span id=\"L-L-C-C3\" class=\"edgeLabel L-LS-C&#039; L-LE-C3\"><\/span> <\/p>\n<p>         <span id=\"L-L-C-C4\" class=\"edgeLabel L-LS-C&#039; L-LE-C4\"><\/span> <\/p>\n<p>         <span id=\"L-L-D-D1\" class=\"edgeLabel L-LS-D&#039; L-LE-D1\"><\/span> <\/p>\n<p>         <span id=\"L-L-D-D2\" class=\"edgeLabel L-LS-D&#039; L-LE-D2\"><\/span> <\/p>\n<p>         <span id=\"L-L-D-D3\" class=\"edgeLabel L-LS-D&#039; L-LE-D3\"><\/span> <\/p>\n<p>         <span id=\"L-L-D-D4\" class=\"edgeLabel L-LS-D&#039; L-LE-D4\"><\/span> <\/p>\n<p>         <span id=\"L-L-E-E1\" class=\"edgeLabel L-LS-E&#039; L-LE-E1\"><\/span> <\/p>\n<p>         <span id=\"L-L-E-E2\" class=\"edgeLabel L-LS-E&#039; L-LE-E2\"><\/span> <\/p>\n<p>         <span id=\"L-L-E-E3\" class=\"edgeLabel L-LS-E&#039; L-LE-E3\"><\/span> <\/p>\n<p>         <span id=\"L-L-F-F1\" class=\"edgeLabel L-LS-F&#039; L-LE-F1\"><\/span> <\/p>\n<p>         <span id=\"L-L-F-F2\" class=\"edgeLabel L-LS-F&#039; L-LE-F2\"><\/span> <\/p>\n<p>         <span id=\"L-L-F-F3\" class=\"edgeLabel L-LS-F&#039; L-LE-F3\"><\/span> <\/p>\n<p>         <span id=\"L-L-G-G1\" class=\"edgeLabel L-LS-G&#039; L-LE-G1\"><\/span> <\/p>\n<p>         <span id=\"L-L-G-G2\" class=\"edgeLabel L-LS-G&#039; L-LE-G2\"><\/span> <\/p>\n<p>         <span id=\"L-L-G-G3\" class=\"edgeLabel L-LS-G&#039; L-LE-G3\"><\/span> <\/p>\n<p>           \u670d\u52a1\u5668\u8fd0\u7ef4 <\/p>\n<p>           \u57fa\u7840\u8bbe\u65bd\u7ba1\u7406 <\/p>\n<p>           \u6027\u80fd\u4f18\u5316 <\/p>\n<p>           \u76d1\u63a7\u544a\u8b66 <\/p>\n<p>           \u81ea\u52a8\u5316\u8fd0\u7ef4 <\/p>\n<p>           \u5b89\u5168\u9632\u62a4 <\/p>\n<p>           \u707e\u5907\u6062\u590d <\/p>\n<p>           \u786c\u4ef6\u9009\u578b <\/p>\n<p>           \u64cd\u4f5c\u7cfb\u7edf\u914d\u7f6e <\/p>\n<p>           \u7f51\u7edc\u8bbe\u7f6e <\/p>\n<p>           CPU\u4f18\u5316 <\/p>\n<p>           \u5185\u5b58\u4f18\u5316 <\/p>\n<p>           \u78c1\u76d8IO\u4f18\u5316 <\/p>\n<p>           \u7f51\u7edc\u4f18\u5316 <\/p>\n<p>           \u6307\u6807\u91c7\u96c6 <\/p>\n<p>           \u65e5\u5fd7\u6536\u96c6 <\/p>\n<p>           \u53ef\u89c6\u5316\u5c55\u793a <\/p>\n<p>           \u544a\u8b66\u7b56\u7565 <\/p>\n<p>           \u914d\u7f6e\u7ba1\u7406 <\/p>\n<p>           \u6301\u7eed\u90e8\u7f72 <\/p>\n<p>           \u6279\u91cf\u64cd\u4f5c <\/p>\n<p>           \u8bbf\u95ee\u63a7\u5236 <\/p>\n<p>           \u6f0f\u6d1e\u7ba1\u7406 <\/p>\n<p>           \u5165\u4fb5\u68c0\u6d4b <\/p>\n<p>           \u6570\u636e\u5907\u4efd <\/p>\n<p>           \u6545\u969c\u8f6c\u79fb <\/p>\n<p>           \u707e\u96be\u6062\u590d <\/p>\n<p>\u670d\u52a1\u5668\u8fd0\u7ef4\u5404\u7ec4\u4ef6\u4e4b\u95f4\u7684\u5173\u7cfb\u53ef\u4ee5\u6982\u62ec\u4e3a&#xff1a;\u57fa\u7840\u8bbe\u65bd\u7ba1\u7406\u662f\u57fa\u7840&#xff0c;\u6027\u80fd\u4f18\u5316\u548c\u76d1\u63a7\u544a\u8b66\u662f\u4fdd\u969c&#xff0c;\u81ea\u52a8\u5316\u8fd0\u7ef4\u662f\u6548\u7387\u63d0\u5347\u7684\u5173\u952e&#xff0c;\u5b89\u5168\u9632\u62a4\u662f\u5fc5\u987b\u7684\u9632\u7ebf&#xff0c;\u707e\u5907\u6062\u590d\u662f\u6700\u540e\u7684\u4fdd\u969c\u3002<\/p>\n<h3>3. \u6838\u5fc3\u7b97\u6cd5\u539f\u7406 &amp; \u5177\u4f53\u64cd\u4f5c\u6b65\u9aa4<\/h3>\n<h4>3.1 \u670d\u52a1\u5668\u6027\u80fd\u4f18\u5316\u7b97\u6cd5<\/h4>\n<p>\u670d\u52a1\u5668\u6027\u80fd\u4f18\u5316\u7684\u6838\u5fc3\u662f\u8d44\u6e90\u8c03\u5ea6\u7b97\u6cd5&#xff0c;\u4e0b\u9762\u4ee5Linux\u7684CFS(\u5b8c\u5168\u516c\u5e73\u8c03\u5ea6\u5668)\u4e3a\u4f8b&#xff1a;<\/p>\n<p><span class=\"token comment\"># \u7b80\u5316\u7684CFS\u8c03\u5ea6\u7b97\u6cd5\u539f\u7406\u6f14\u793a<\/span><br \/>\n<span class=\"token keyword\">import<\/span> heapq<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Task<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> pid<span class=\"token punctuation\">,<\/span> nice<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>pid <span class=\"token operator\">&#061;<\/span> pid<br \/>\n        self<span class=\"token punctuation\">.<\/span>nice <span class=\"token operator\">&#061;<\/span> nice  <span class=\"token comment\"># -20\u523019&#xff0c;\u503c\u8d8a\u5c0f\u4f18\u5148\u7ea7\u8d8a\u9ad8<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>vruntime <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span>  <span class=\"token comment\"># \u865a\u62df\u8fd0\u884c\u65f6\u95f4<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__lt__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> other<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u6bd4\u8f83\u51fd\u6570&#xff0c;\u7528\u4e8e\u5806\u6392\u5e8f<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> self<span class=\"token punctuation\">.<\/span>vruntime <span class=\"token operator\">&lt;<\/span> other<span class=\"token punctuation\">.<\/span>vruntime<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">CFS<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>tasks <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>min_granularity <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.75<\/span>  <span class=\"token comment\"># \u6700\u5c0f\u8c03\u5ea6\u65f6\u95f4\u7247(ms)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>latency <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">6.0<\/span>  <span class=\"token comment\"># \u8c03\u5ea6\u5ef6\u8fdf(ms)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">add_task<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> task<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        heapq<span class=\"token punctuation\">.<\/span>heappush<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>tasks<span class=\"token punctuation\">,<\/span> task<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">schedule<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> self<span class=\"token punctuation\">.<\/span>tasks<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">None<\/span><\/p>\n<p>        <span class=\"token comment\"># \u8ba1\u7b97\u65f6\u95f4\u7247<\/span><br \/>\n        nr_running <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>tasks<span class=\"token punctuation\">)<\/span><br \/>\n        slice_time <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>min_granularity<span class=\"token punctuation\">,<\/span> self<span class=\"token punctuation\">.<\/span>latency <span class=\"token operator\">\/<\/span> nr_running<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u83b7\u53d6\u5f53\u524d\u4efb\u52a1<\/span><br \/>\n        current <span class=\"token operator\">&#061;<\/span> heapq<span class=\"token punctuation\">.<\/span>heappop<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>tasks<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u66f4\u65b0\u865a\u62df\u8fd0\u884c\u65f6\u95f4<\/span><br \/>\n        weight <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1024<\/span> <span class=\"token operator\">\/<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1.25<\/span> <span class=\"token operator\">**<\/span> current<span class=\"token punctuation\">.<\/span>nice<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u6839\u636enice\u503c\u8ba1\u7b97\u6743\u91cd<\/span><br \/>\n        current<span class=\"token punctuation\">.<\/span>vruntime <span class=\"token operator\">&#043;&#061;<\/span> slice_time <span class=\"token operator\">*<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">1024<\/span> <span class=\"token operator\">\/<\/span> weight<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u91cd\u65b0\u52a0\u5165\u961f\u5217<\/span><br \/>\n        heapq<span class=\"token punctuation\">.<\/span>heappush<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>tasks<span class=\"token punctuation\">,<\/span> current<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> current<span class=\"token punctuation\">.<\/span>pid<span class=\"token punctuation\">,<\/span> slice_time<\/p>\n<p><span class=\"token comment\"># \u4f7f\u7528\u793a\u4f8b<\/span><br \/>\ncfs <span class=\"token operator\">&#061;<\/span> CFS<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\ncfs<span class=\"token punctuation\">.<\/span>add_task<span class=\"token punctuation\">(<\/span>Task<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\"># \u666e\u901a\u4f18\u5148\u7ea7<\/span><br \/>\ncfs<span class=\"token punctuation\">.<\/span>add_task<span class=\"token punctuation\">(<\/span>Task<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8f83\u9ad8\u4f18\u5148\u7ea7<\/span><br \/>\ncfs<span class=\"token punctuation\">.<\/span>add_task<span class=\"token punctuation\">(<\/span>Task<span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8f83\u4f4e\u4f18\u5148\u7ea7<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> _ <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>cfs<span class=\"token punctuation\">.<\/span>schedule<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>3.2 \u670d\u52a1\u5668\u76d1\u63a7\u6570\u636e\u91c7\u96c6\u7b97\u6cd5<\/h4>\n<p>\u9ad8\u6548\u7684\u76d1\u63a7\u6570\u636e\u91c7\u96c6\u9700\u8981\u8003\u8651\u91c7\u6837\u9891\u7387\u548c\u6570\u636e\u805a\u5408&#xff0c;\u4ee5\u4e0b\u662f\u65f6\u95f4\u5e8f\u5217\u6570\u636e\u91c7\u96c6\u7684\u6838\u5fc3\u7b97\u6cd5&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> time<br \/>\n<span class=\"token keyword\">from<\/span> collections <span class=\"token keyword\">import<\/span> deque<br \/>\n<span class=\"token keyword\">import<\/span> statistics<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">TimeSeriesCollector<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> max_points<span class=\"token operator\">&#061;<\/span><span class=\"token number\">3600<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>data <span class=\"token operator\">&#061;<\/span> deque<span class=\"token punctuation\">(<\/span>maxlen<span class=\"token operator\">&#061;<\/span>max_points<span class=\"token punctuation\">)<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>last_collect_time <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">collect<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> value<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        now <span class=\"token operator\">&#061;<\/span> time<span class=\"token punctuation\">.<\/span>time<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        elapsed <span class=\"token operator\">&#061;<\/span> now <span class=\"token operator\">&#8211;<\/span> self<span class=\"token punctuation\">.<\/span>last_collect_time<br \/>\n        self<span class=\"token punctuation\">.<\/span>last_collect_time <span class=\"token operator\">&#061;<\/span> now<\/p>\n<p>        <span class=\"token comment\"># \u7b80\u5355\u7684\u6570\u636e\u5e73\u6ed1\u5904\u7406<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> self<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">:<\/span><br \/>\n            last <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><br \/>\n            smoothed <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0.7<\/span> <span class=\"token operator\">*<\/span> last <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">0.3<\/span> <span class=\"token operator\">*<\/span> value<br \/>\n            self<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>smoothed<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            self<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> elapsed<\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">get_stats<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> window<span class=\"token operator\">&#061;<\/span><span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u83b7\u53d6\u6700\u8fd1window\u79d2\u5185\u7684\u7edf\u8ba1\u4fe1\u606f&#034;&#034;&#034;<\/span><br \/>\n        recent <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>v <span class=\"token keyword\">for<\/span> v <span class=\"token keyword\">in<\/span> self<span class=\"token punctuation\">.<\/span>data<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span>window<span class=\"token punctuation\">:<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> recent<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">None<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;min&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">min<\/span><span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;max&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;avg&#039;<\/span><span class=\"token punctuation\">:<\/span> statistics<span class=\"token punctuation\">.<\/span>mean<span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;median&#039;<\/span><span class=\"token punctuation\">:<\/span> statistics<span class=\"token punctuation\">.<\/span>median<span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;stddev&#039;<\/span><span class=\"token punctuation\">:<\/span> statistics<span class=\"token punctuation\">.<\/span>stdev<span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>recent<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">1<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token number\">0<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\"># \u4f7f\u7528\u793a\u4f8b<\/span><br \/>\ncollector <span class=\"token operator\">&#061;<\/span> TimeSeriesCollector<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u6a21\u62df\u6570\u636e\u91c7\u96c6<\/span><br \/>\n<span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    value <span class=\"token operator\">&#061;<\/span> i <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span> <span class=\"token keyword\">if<\/span> i <span class=\"token operator\">%<\/span> <span class=\"token number\">20<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u6a21\u62df\u5076\u5c14\u7684\u5cf0\u503c<\/span><br \/>\n    collector<span class=\"token punctuation\">.<\/span>collect<span class=\"token punctuation\">(<\/span>value<span class=\"token punctuation\">)<\/span><br \/>\n    time<span class=\"token punctuation\">.<\/span>sleep<span class=\"token punctuation\">(<\/span><span class=\"token number\">0.1<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Recent stats:&#034;<\/span><span class=\"token punctuation\">,<\/span> collector<span class=\"token punctuation\">.<\/span>get_stats<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>4. \u6570\u5b66\u6a21\u578b\u548c\u516c\u5f0f &amp; \u8be6\u7ec6\u8bb2\u89e3 &amp; \u4e3e\u4f8b\u8bf4\u660e<\/h3>\n<h4>4.1 \u670d\u52a1\u5668\u6027\u80fd\u5bb9\u91cf\u89c4\u5212\u6a21\u578b<\/h4>\n<p>\u670d\u52a1\u5668\u5bb9\u91cf\u89c4\u5212\u9700\u8981\u8003\u8651\u591a\u4e2a\u56e0\u7d20&#xff0c;\u53ef\u4ee5\u4f7f\u7528\u6392\u961f\u8bba\u4e2d\u7684M\/M\/c\u6a21\u578b&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>           P <\/p>\n<p>           0 <\/p>\n<p>          &#061; <\/p>\n<p>            [ <\/p>\n<p>             \u2211 <\/p>\n<p>              k <\/p>\n<p>              &#061; <\/p>\n<p>              0 <\/p>\n<p>              c <\/p>\n<p>              \u2212 <\/p>\n<p>              1 <\/p>\n<p>              ( <\/p>\n<p>              c <\/p>\n<p>              \u03c1 <\/p>\n<p>               ) <\/p>\n<p>               k <\/p>\n<p>              k <\/p>\n<p>              ! <\/p>\n<p>            &#043; <\/p>\n<p>              ( <\/p>\n<p>              c <\/p>\n<p>              \u03c1 <\/p>\n<p>               ) <\/p>\n<p>               c <\/p>\n<p>              c <\/p>\n<p>              ! <\/p>\n<p>              ( <\/p>\n<p>              1 <\/p>\n<p>              \u2212 <\/p>\n<p>              \u03c1 <\/p>\n<p>              ) <\/p>\n<p>            ] <\/p>\n<p>            \u2212 <\/p>\n<p>            1 <\/p>\n<p>         P_0 &#061; \\\\left[ \\\\sum_{k&#061;0}^{c-1} \\\\frac{(c\\\\rho)^k}{k!} &#043; \\\\frac{(c\\\\rho)^c}{c!(1-\\\\rho)} \\\\right]^{-1} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3011em\"><span class=\"\" style=\"top: -2.55em;margin-left: -0.1389em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">0<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 3.3072em;vertical-align: -1.3021em\"><\/span><span class=\"minner\"><span class=\"minner\"><span class=\"mopen delimcenter\" style=\"top: 0em\"><span class=\"delimsizing size4\">[<\/span><\/span><span class=\"mop op-limits\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.8011em\"><span class=\"\" style=\"top: -1.8479em;margin-left: 0em\"><span class=\"pstrut\" style=\"height: 3.05em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right: 0.0315em\">k<\/span><span class=\"mrel mtight\">&#061;<\/span><span class=\"mord mtight\">0<\/span><\/span><\/span><\/span><span class=\"\" style=\"top: -3.05em\"><span class=\"pstrut\" style=\"height: 3.05em\"><\/span><span class=\"\"><span class=\"mop op-symbol large-op\">\u2211<\/span><\/span><\/span><span class=\"\" style=\"top: -4.3em;margin-left: 0em\"><span class=\"pstrut\" style=\"height: 3.05em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">c<\/span><span class=\"mbin mtight\">\u2212<\/span><span class=\"mord mtight\">1<\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.3021em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.1667em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.5261em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.0315em\">k<\/span><span class=\"mclose\">!<\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mopen\">(<\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mclose\"><span class=\"mclose\">)<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8491em\"><span class=\"\" style=\"top: -3.063em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\" style=\"margin-right: 0.0315em\">k<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.686em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.427em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">c<\/span><span class=\"mclose\">!<\/span><span class=\"mopen\">(<\/span><span class=\"mord\">1<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mclose\">)<\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mopen\">(<\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mclose\"><span class=\"mclose\">)<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.6644em\"><span class=\"\" style=\"top: -3.063em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">c<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.936em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><span class=\"mclose delimcenter\" style=\"top: 0em\"><span class=\"delimsizing size4\">]<\/span><\/span><\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 2.0051em\"><span class=\"\" style=\"top: -4.254em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mtight\">\u2212<\/span><span class=\"mord mtight\">1<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<ul>\n<li><span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          c <\/p>\n<p>         c <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.4306em\"><\/span><span class=\"mord mathnormal\">c<\/span><\/span><\/span><\/span><\/span> \u662f\u670d\u52a1\u5668\u6570\u91cf<\/li>\n<li><span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          \u03c1 <\/p>\n<p>          &#061; <\/p>\n<p>          \u03bb <\/p>\n<p>          \/ <\/p>\n<p>          ( <\/p>\n<p>          c <\/p>\n<p>          \u03bc <\/p>\n<p>          ) <\/p>\n<p>         \\\\rho &#061; \\\\lambda\/(c\\\\mu) <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.625em;vertical-align: -0.1944em\"><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 1em;vertical-align: -0.25em\"><\/span><span class=\"mord mathnormal\">\u03bb<\/span><span class=\"mord\">\/<\/span><span class=\"mopen\">(<\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mord mathnormal\">\u03bc<\/span><span class=\"mclose\">)<\/span><\/span><\/span><\/span><\/span> \u662f\u7cfb\u7edf\u5229\u7528\u7387<\/li>\n<li><span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          \u03bb <\/p>\n<p>         \\\\lambda <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6944em\"><\/span><span class=\"mord mathnormal\">\u03bb<\/span><\/span><\/span><\/span><\/span> \u662f\u5230\u8fbe\u7387(\u8bf7\u6c42\/\u79d2)<\/li>\n<li><span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          \u03bc <\/p>\n<p>         \\\\mu <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.625em;vertical-align: -0.1944em\"><\/span><span class=\"mord mathnormal\">\u03bc<\/span><\/span><\/span><\/span><\/span> \u662f\u670d\u52a1\u7387(\u8bf7\u6c42\/\u79d2)<\/li>\n<\/ul>\n<p>\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u516c\u5f0f&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          T <\/p>\n<p>          &#061; <\/p>\n<p>           1 <\/p>\n<p>           \u03bc <\/p>\n<p>          &#043; <\/p>\n<p>            ( <\/p>\n<p>            c <\/p>\n<p>            \u03c1 <\/p>\n<p>             ) <\/p>\n<p>             c <\/p>\n<p>            \u03c1 <\/p>\n<p>             P <\/p>\n<p>             0 <\/p>\n<p>            \u03bb <\/p>\n<p>            c <\/p>\n<p>            ! <\/p>\n<p>            ( <\/p>\n<p>            1 <\/p>\n<p>            \u2212 <\/p>\n<p>            \u03c1 <\/p>\n<p>             ) <\/p>\n<p>             2 <\/p>\n<p>         T &#061; \\\\frac{1}{\\\\mu} &#043; \\\\frac{(c\\\\rho)^c \\\\rho P_0}{\\\\lambda c! (1-\\\\rho)^2} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">T<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 2.2019em;vertical-align: -0.8804em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.3214em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">\u03bc<\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">1<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.8804em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 2.363em;vertical-align: -0.936em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.427em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\">\u03bb<\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mclose\">!<\/span><span class=\"mopen\">(<\/span><span class=\"mord\">1<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u2212<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mclose\"><span class=\"mclose\">)<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.7401em\"><span class=\"\" style=\"top: -2.989em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mopen\">(<\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mclose\"><span class=\"mclose\">)<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.6644em\"><span class=\"\" style=\"top: -3.063em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">c<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3011em\"><span class=\"\" style=\"top: -2.55em;margin-left: -0.1389em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">0<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.936em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u4e3e\u4f8b\u8bf4\u660e&#xff1a; \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2aWeb\u670d\u52a1&#xff1a;<\/p>\n<ul>\n<li>\u5e73\u5747\u8bf7\u6c42\u5230\u8fbe\u7387 <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          \u03bb <\/p>\n<p>          &#061; <\/p>\n<p>          50 <\/p>\n<p>         \\\\lambda &#061; 50 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6944em\"><\/span><span class=\"mord mathnormal\">\u03bb<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">50<\/span><\/span><\/span><\/span><\/span> \u8bf7\u6c42\/\u79d2<\/li>\n<li>\u6bcf\u53f0\u670d\u52a1\u5668\u5904\u7406\u80fd\u529b <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          \u03bc <\/p>\n<p>          &#061; <\/p>\n<p>          10 <\/p>\n<p>         \\\\mu &#061; 10 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.625em;vertical-align: -0.1944em\"><\/span><span class=\"mord mathnormal\">\u03bc<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">10<\/span><\/span><\/span><\/span><\/span> \u8bf7\u6c42\/\u79d2<\/li>\n<li>\u670d\u52a1\u5668\u6570\u91cf <span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\">\n<p>          c <\/p>\n<p>          &#061; <\/p>\n<p>          6 <\/p>\n<p>         c &#061; 6 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.4306em\"><\/span><span class=\"mord mathnormal\">c<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">6<\/span><\/span><\/span><\/span><\/span><\/li>\n<\/ul>\n<p>\u8ba1\u7b97\u7cfb\u7edf\u5229\u7528\u7387&#xff1a; <span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          \u03c1 <\/p>\n<p>          &#061; <\/p>\n<p>           50 <\/p>\n<p>            6 <\/p>\n<p>            \u00d7 <\/p>\n<p>            10 <\/p>\n<p>          \u2248 <\/p>\n<p>          0.833 <\/p>\n<p>         \\\\rho &#061; \\\\frac{50}{6 \\\\times 10} \\\\approx 0.833 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.625em;vertical-align: -0.1944em\"><\/span><span class=\"mord mathnormal\">\u03c1<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 2.0908em;vertical-align: -0.7693em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.3214em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">6<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">\u00d7<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord\">10<\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">50<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.7693em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">0.833<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u8ba1\u7b97<span class=\"katex--inline\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          P <\/p>\n<p>          0 <\/p>\n<p>        P_0 <\/p>\n<p>    <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3011em\"><span class=\"\" style=\"top: -2.55em;margin-left: -0.1389em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">0<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>&#xff1a; <span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>           P <\/p>\n<p>           0 <\/p>\n<p>          \u2248 <\/p>\n<p>          0.0045 <\/p>\n<p>         P_0 \\\\approx 0.0045 <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.8333em;vertical-align: -0.15em\"><\/span><span class=\"mord\"><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">P<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.3011em\"><span class=\"\" style=\"top: -2.55em;margin-left: -0.1389em;margin-right: 0.05em\"><span class=\"pstrut\" style=\"height: 2.7em\"><\/span><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">0<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.15em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">0.0045<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u6700\u7ec8\u5e73\u5747\u54cd\u5e94\u65f6\u95f4&#xff1a; <span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          T <\/p>\n<p>          \u2248 <\/p>\n<p>          0.1 <\/p>\n<p>          &#043; <\/p>\n<p>          0.024 <\/p>\n<p>          \u2248 <\/p>\n<p>          0.124 <\/p>\n<p>          \u79d2 <\/p>\n<p>         T \\\\approx 0.1 &#043; 0.024 \\\\approx 0.124 \\\\text{\u79d2} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord mathnormal\" style=\"margin-right: 0.1389em\">T<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.7278em;vertical-align: -0.0833em\"><\/span><span class=\"mord\">0.1<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6444em\"><\/span><span class=\"mord\">0.024<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord\">0.124<\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u79d2<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<h4>4.2 \u78c1\u76d8IO\u6027\u80fd\u6a21\u578b<\/h4>\n<p>\u78c1\u76d8IO\u6027\u80fd\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u4f30\u7b97&#xff1a;<\/p>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          IOPS <\/p>\n<p>          &#061; <\/p>\n<p>           1 <\/p>\n<p>            \u5bfb\u9053\u65f6\u95f4 <\/p>\n<p>            &#043; <\/p>\n<p>            \u65cb\u8f6c\u5ef6\u8fdf <\/p>\n<p>            &#043; <\/p>\n<p>            \u4f20\u8f93\u65f6\u95f4 <\/p>\n<p>         \\\\text{IOPS} &#061; \\\\frac{1}{\\\\text{\u5bfb\u9053\u65f6\u95f4} &#043; \\\\text{\u65cb\u8f6c\u5ef6\u8fdf} &#043; \\\\text{\u4f20\u8f93\u65f6\u95f4}} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord text\"><span class=\"mord\">IOPS<\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">&#061;<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 2.0908em;vertical-align: -0.7693em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.3214em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u5bfb\u9053\u65f6\u95f4<\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u65cb\u8f6c\u5ef6\u8fdf<\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord text\"><span class=\"mord cjk_fallback\">\u4f20\u8f93\u65f6\u95f4<\/span><\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">1<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.7693em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5bf9\u4e8e7200 RPM\u7684\u78c1\u76d8&#xff1a;<\/p>\n<ul>\n<li>\u5e73\u5747\u65cb\u8f6c\u5ef6\u8fdf &#061; 60 \/ (7200 \u00d7 2) &#061; 4.17ms<\/li>\n<li>\u5e73\u5747\u5bfb\u9053\u65f6\u95f4 \u2248 5ms<\/li>\n<li>\u4f20\u8f93\u65f6\u95f4 \u2248 0.05ms (\u5bf9\u4e8e4KB\u5757)<\/li>\n<\/ul>\n<p><span class=\"katex--display\"><span class=\"katex-display\"><span class=\"katex\"><span class=\"katex-mathml\"> <\/p>\n<p>          IOPS <\/p>\n<p>          \u2248 <\/p>\n<p>           1 <\/p>\n<p>            0.005 <\/p>\n<p>            &#043; <\/p>\n<p>            0.00417 <\/p>\n<p>            &#043; <\/p>\n<p>            0.00005 <\/p>\n<p>          \u2248 <\/p>\n<p>          108 <\/p>\n<p>          \u00a0IOPS <\/p>\n<p>         \\\\text{IOPS} \\\\approx \\\\frac{1}{0.005 &#043; 0.00417 &#043; 0.00005} \\\\approx 108 \\\\text{ IOPS} <\/p>\n<p>     <\/span><span class=\"katex-html\"><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord text\"><span class=\"mord\">IOPS<\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 2.0908em;vertical-align: -0.7693em\"><\/span><span class=\"mord\"><span class=\"mopen nulldelimiter\"><\/span><span class=\"mfrac\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 1.3214em\"><span class=\"\" style=\"top: -2.314em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">0.005<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord\">0.00417<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mbin\">&#043;<\/span><span class=\"mspace\" style=\"margin-right: 0.2222em\"><\/span><span class=\"mord\">0.00005<\/span><\/span><\/span><span class=\"\" style=\"top: -3.23em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"frac-line\" style=\"border-bottom-width: 0.04em\"><\/span><\/span><span class=\"\" style=\"top: -3.677em\"><span class=\"pstrut\" style=\"height: 3em\"><\/span><span class=\"mord\"><span class=\"mord\">1<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><span class=\"vlist-r\"><span class=\"vlist\" style=\"height: 0.7693em\"><span class=\"\"><\/span><\/span><\/span><\/span><\/span><span class=\"mclose nulldelimiter\"><\/span><\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><span class=\"mrel\">\u2248<\/span><span class=\"mspace\" style=\"margin-right: 0.2778em\"><\/span><\/span><span class=\"base\"><span class=\"strut\" style=\"height: 0.6833em\"><\/span><span class=\"mord\">108<\/span><span class=\"mord text\"><span class=\"mord\">\u00a0IOPS<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p>\u5bf9\u4e8eSSD&#xff0c;\u7531\u4e8e\u6ca1\u6709\u673a\u68b0\u90e8\u4ef6&#xff0c;\u5178\u578bIOPS\u53ef\u8fbe\u6570\u4e07\u5230\u6570\u5341\u4e07\u3002<\/p>\n<h3>5. \u9879\u76ee\u5b9e\u6218&#xff1a;\u4ee3\u7801\u5b9e\u9645\u6848\u4f8b\u548c\u8be6\u7ec6\u89e3\u91ca\u8bf4\u660e<\/h3>\n<h4>5.1 \u5f00\u53d1\u73af\u5883\u642d\u5efa<\/h4>\n<h5>5.1.1 \u57fa\u7840\u73af\u5883\u51c6\u5907<\/h5>\n<p><span class=\"token comment\"># \u5b89\u88c5\u5e38\u7528\u5de5\u5177<\/span><br \/>\n<span class=\"token function\">sudo<\/span> <span class=\"token function\">apt-get<\/span> update<br \/>\n<span class=\"token function\">sudo<\/span> <span class=\"token function\">apt-get<\/span> <span class=\"token function\">install<\/span> -y <span class=\"token function\">git<\/span> <span class=\"token function\">curl<\/span> <span class=\"token function\">wget<\/span> <span class=\"token function\">htop<\/span> iftop iotop sysstat<\/p>\n<p><span class=\"token comment\"># \u5b89\u88c5Docker<\/span><br \/>\n<span class=\"token function\">curl<\/span> -fsSL https:\/\/get.docker.com <span class=\"token operator\">|<\/span> <span class=\"token function\">sh<\/span><br \/>\n<span class=\"token function\">sudo<\/span> <span class=\"token function\">usermod<\/span> -aG docker <span class=\"token environment constant\">$USER<\/span><\/p>\n<p><span class=\"token comment\"># \u5b89\u88c5\u76d1\u63a7\u5de5\u5177<\/span><br \/>\n<span class=\"token function\">wget<\/span> https:\/\/github.com\/prometheus\/prometheus\/releases\/download\/v2.30.3\/prometheus-2.30.3.linux-amd64.tar.gz<br \/>\n<span class=\"token function\">tar<\/span> xvfz prometheus-*.tar.gz<br \/>\n<span class=\"token builtin class-name\">cd<\/span> prometheus-*<\/p>\n<h5>5.1.2 \u914d\u7f6e\u81ea\u52a8\u5316\u90e8\u7f72<\/h5>\n<p>\u521b\u5efaAnsible playbook\u6587\u4ef6 deploy.yml:<\/p>\n<p><span class=\"token punctuation\">&#8212;<\/span><br \/>\n<span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">hosts<\/span><span class=\"token punctuation\">:<\/span> webservers<br \/>\n  <span class=\"token key atrule\">become<\/span><span class=\"token punctuation\">:<\/span> yes<br \/>\n  <span class=\"token key atrule\">tasks<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> Ensure Nginx is installed<br \/>\n      <span class=\"token key atrule\">apt<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> nginx<br \/>\n        <span class=\"token key atrule\">state<\/span><span class=\"token punctuation\">:<\/span> latest<br \/>\n        <span class=\"token key atrule\">update_cache<\/span><span class=\"token punctuation\">:<\/span> yes<\/p>\n<p>    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> Copy Nginx config<br \/>\n      <span class=\"token key atrule\">template<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">src<\/span><span class=\"token punctuation\">:<\/span> templates\/nginx.conf.j2<br \/>\n        <span class=\"token key atrule\">dest<\/span><span class=\"token punctuation\">:<\/span> \/etc\/nginx\/nginx.conf<br \/>\n      <span class=\"token key atrule\">notify<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token punctuation\">&#8211;<\/span> Restart Nginx<\/p>\n<p>    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> Ensure Nginx is running<br \/>\n      <span class=\"token key atrule\">service<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> nginx<br \/>\n        <span class=\"token key atrule\">state<\/span><span class=\"token punctuation\">:<\/span> started<br \/>\n        <span class=\"token key atrule\">enabled<\/span><span class=\"token punctuation\">:<\/span> yes<\/p>\n<p>  <span class=\"token key atrule\">handlers<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token punctuation\">&#8211;<\/span> <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> Restart Nginx<br \/>\n      <span class=\"token key atrule\">service<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token key atrule\">name<\/span><span class=\"token punctuation\">:<\/span> nginx<br \/>\n        <span class=\"token key atrule\">state<\/span><span class=\"token punctuation\">:<\/span> restarted<\/p>\n<h4>5.2 \u6e90\u4ee3\u7801\u8be6\u7ec6\u5b9e\u73b0\u548c\u4ee3\u7801\u89e3\u8bfb<\/h4>\n<h5>5.2.1 \u81ea\u52a8\u5316\u76d1\u63a7\u811a\u672c<\/h5>\n<p>\u521b\u5efaPython\u76d1\u63a7\u811a\u672c monitor.py:<\/p>\n<p><span class=\"token comment\">#!\/usr\/bin\/env python3<\/span><br \/>\n<span class=\"token keyword\">import<\/span> psutil<br \/>\n<span class=\"token keyword\">import<\/span> time<br \/>\n<span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> datetime<br \/>\n<span class=\"token keyword\">import<\/span> json<br \/>\n<span class=\"token keyword\">import<\/span> socket<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ServerMonitor<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> interval<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>interval <span class=\"token operator\">&#061;<\/span> interval<br \/>\n        self<span class=\"token punctuation\">.<\/span>hostname <span class=\"token operator\">&#061;<\/span> socket<span class=\"token punctuation\">.<\/span>gethostname<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">get_cpu_metrics<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        cpu_percent <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>cpu_percent<span class=\"token punctuation\">(<\/span>interval<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        load_avg <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>getloadavg<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;cpu_percent&#039;<\/span><span class=\"token punctuation\">:<\/span> cpu_percent<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;load_1&#039;<\/span><span class=\"token punctuation\">:<\/span> load_avg<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;load_5&#039;<\/span><span class=\"token punctuation\">:<\/span> load_avg<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;load_15&#039;<\/span><span class=\"token punctuation\">:<\/span> load_avg<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;cpu_count&#039;<\/span><span class=\"token punctuation\">:<\/span> psutil<span class=\"token punctuation\">.<\/span>cpu_count<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">get_memory_metrics<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        mem <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>virtual_memory<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        swap <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>swap_memory<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;mem_total&#039;<\/span><span class=\"token punctuation\">:<\/span> mem<span class=\"token punctuation\">.<\/span>total<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;mem_used&#039;<\/span><span class=\"token punctuation\">:<\/span> mem<span class=\"token punctuation\">.<\/span>used<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;mem_free&#039;<\/span><span class=\"token punctuation\">:<\/span> mem<span class=\"token punctuation\">.<\/span>free<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;mem_percent&#039;<\/span><span class=\"token punctuation\">:<\/span> mem<span class=\"token punctuation\">.<\/span>percent<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;swap_total&#039;<\/span><span class=\"token punctuation\">:<\/span> swap<span class=\"token punctuation\">.<\/span>total<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;swap_used&#039;<\/span><span class=\"token punctuation\">:<\/span> swap<span class=\"token punctuation\">.<\/span>used<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;swap_percent&#039;<\/span><span class=\"token punctuation\">:<\/span> swap<span class=\"token punctuation\">.<\/span>percent<br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">get_disk_metrics<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        disk <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>disk_usage<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\/&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        io <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>disk_io_counters<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;disk_total&#039;<\/span><span class=\"token punctuation\">:<\/span> disk<span class=\"token punctuation\">.<\/span>total<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;disk_used&#039;<\/span><span class=\"token punctuation\">:<\/span> disk<span class=\"token punctuation\">.<\/span>used<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;disk_free&#039;<\/span><span class=\"token punctuation\">:<\/span> disk<span class=\"token punctuation\">.<\/span>free<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;disk_percent&#039;<\/span><span class=\"token punctuation\">:<\/span> disk<span class=\"token punctuation\">.<\/span>percent<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;read_count&#039;<\/span><span class=\"token punctuation\">:<\/span> io<span class=\"token punctuation\">.<\/span>read_count<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;write_count&#039;<\/span><span class=\"token punctuation\">:<\/span> io<span class=\"token punctuation\">.<\/span>write_count<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;read_bytes&#039;<\/span><span class=\"token punctuation\">:<\/span> io<span class=\"token punctuation\">.<\/span>read_bytes<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;write_bytes&#039;<\/span><span class=\"token punctuation\">:<\/span> io<span class=\"token punctuation\">.<\/span>write_bytes<br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">get_network_metrics<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        net <span class=\"token operator\">&#061;<\/span> psutil<span class=\"token punctuation\">.<\/span>net_io_counters<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;bytes_sent&#039;<\/span><span class=\"token punctuation\">:<\/span> net<span class=\"token punctuation\">.<\/span>bytes_sent<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;bytes_recv&#039;<\/span><span class=\"token punctuation\">:<\/span> net<span class=\"token punctuation\">.<\/span>bytes_recv<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;packets_sent&#039;<\/span><span class=\"token punctuation\">:<\/span> net<span class=\"token punctuation\">.<\/span>packets_sent<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;packets_recv&#039;<\/span><span class=\"token punctuation\">:<\/span> net<span class=\"token punctuation\">.<\/span>packets_recv<br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">collect_all<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        timestamp <span class=\"token operator\">&#061;<\/span> datetime<span class=\"token punctuation\">.<\/span>utcnow<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>isoformat<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        metrics <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;timestamp&#039;<\/span><span class=\"token punctuation\">:<\/span> timestamp<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;hostname&#039;<\/span><span class=\"token punctuation\">:<\/span> self<span class=\"token punctuation\">.<\/span>hostname<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;cpu&#039;<\/span><span class=\"token punctuation\">:<\/span> self<span class=\"token punctuation\">.<\/span>get_cpu_metrics<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;memory&#039;<\/span><span class=\"token punctuation\">:<\/span> self<span class=\"token punctuation\">.<\/span>get_memory_metrics<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;disk&#039;<\/span><span class=\"token punctuation\">:<\/span> self<span class=\"token punctuation\">.<\/span>get_disk_metrics<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#039;network&#039;<\/span><span class=\"token punctuation\">:<\/span> self<span class=\"token punctuation\">.<\/span>get_network_metrics<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> metrics<\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">run<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            data <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>collect_all<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span>data<span class=\"token punctuation\">,<\/span> indent<span class=\"token operator\">&#061;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            time<span class=\"token punctuation\">.<\/span>sleep<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>interval<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;__main__&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    monitor <span class=\"token operator\">&#061;<\/span> ServerMonitor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    monitor<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h5>5.2.2 \u4ee3\u7801\u89e3\u8bfb\u4e0e\u5206\u6790<\/h5>\n<li>\n<p>CPU\u76d1\u63a7\u90e8\u5206&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528psutil.cpu_percent()\u83b7\u53d6CPU\u4f7f\u7528\u7387<\/li>\n<li>getloadavg()\u83b7\u53d6\u7cfb\u7edf\u8d1f\u8f7d\u5e73\u5747\u503c<\/li>\n<li>cpu_count()\u83b7\u53d6CPU\u6838\u5fc3\u6570<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5185\u5b58\u76d1\u63a7\u90e8\u5206&#xff1a;<\/p>\n<ul>\n<li>virtual_memory()\u83b7\u53d6\u7269\u7406\u5185\u5b58\u4f7f\u7528\u60c5\u51b5<\/li>\n<li>swap_memory()\u83b7\u53d6\u4ea4\u6362\u5206\u533a\u4f7f\u7528\u60c5\u51b5<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u78c1\u76d8\u76d1\u63a7\u90e8\u5206&#xff1a;<\/p>\n<ul>\n<li>disk_usage(&#039;\/&#039;)\u83b7\u53d6\u6839\u5206\u533a\u4f7f\u7528\u60c5\u51b5<\/li>\n<li>disk_io_counters()\u83b7\u53d6\u78c1\u76d8IO\u7edf\u8ba1<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u7f51\u7edc\u76d1\u63a7\u90e8\u5206&#xff1a;<\/p>\n<ul>\n<li>net_io_counters()\u83b7\u53d6\u7f51\u7edcIO\u7edf\u8ba1<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6570\u636e\u6536\u96c6&#xff1a;<\/p>\n<ul>\n<li>\u6240\u6709\u6307\u6807\u6309\u56fa\u5b9a\u95f4\u9694\u6536\u96c6<\/li>\n<li>\u6570\u636e\u4ee5JSON\u683c\u5f0f\u8f93\u51fa&#xff0c;\u4fbf\u4e8e\u540e\u7eed\u5904\u7406<\/li>\n<\/ul>\n<\/li>\n<h4>5.3 \u9ad8\u7ea7\u8fd0\u7ef4&#xff1a;\u81ea\u52a8\u5316\u6545\u969c\u5904\u7406<\/h4>\n<p>\u521b\u5efa\u81ea\u52a8\u5316\u6545\u969c\u5904\u7406\u811a\u672c auto_healer.py:<\/p>\n<p><span class=\"token comment\">#!\/usr\/bin\/env python3<\/span><br \/>\n<span class=\"token keyword\">import<\/span> subprocess<br \/>\n<span class=\"token keyword\">import<\/span> logging<br \/>\n<span class=\"token keyword\">import<\/span> time<br \/>\n<span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> datetime<\/p>\n<p>logging<span class=\"token punctuation\">.<\/span>basicConfig<span class=\"token punctuation\">(<\/span><br \/>\n    level<span class=\"token operator\">&#061;<\/span>logging<span class=\"token punctuation\">.<\/span>INFO<span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token builtin\">format<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;%(asctime)s &#8211; %(levelname)s &#8211; %(message)s&#039;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    filename<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#039;\/var\/log\/auto_healer.log&#039;<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">AutoHealer<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>thresholds <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token string\">&#039;cpu&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">90<\/span><span class=\"token punctuation\">,<\/span>      <span class=\"token comment\"># CPU\u4f7f\u7528\u7387\u9608\u503c(%)<\/span><br \/>\n            <span class=\"token string\">&#039;memory&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">90<\/span><span class=\"token punctuation\">,<\/span>   <span class=\"token comment\"># \u5185\u5b58\u4f7f\u7528\u7387\u9608\u503c(%)<\/span><br \/>\n            <span class=\"token string\">&#039;disk&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">90<\/span><span class=\"token punctuation\">,<\/span>     <span class=\"token comment\"># \u78c1\u76d8\u4f7f\u7528\u7387\u9608\u503c(%)<\/span><br \/>\n            <span class=\"token string\">&#039;load_factor&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">2.0<\/span>  <span class=\"token comment\"># \u8d1f\u8f7d\u56e0\u5b50(load_1 \/ cpu_count)<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">check_cpu<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            output <span class=\"token operator\">&#061;<\/span> subprocess<span class=\"token punctuation\">.<\/span>check_output<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;uptime&#034;<\/span><span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            load_avg <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">(<\/span>output<span class=\"token punctuation\">.<\/span>decode<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>split<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>replace<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;,&#039;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#039;&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            cpu_count <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">(<\/span>subprocess<span class=\"token punctuation\">.<\/span>check_output<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;nproc&#034;<\/span><span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> load_avg <span class=\"token operator\">&gt;<\/span> cpu_count <span class=\"token operator\">*<\/span> self<span class=\"token punctuation\">.<\/span>thresholds<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;load_factor&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                logging<span class=\"token punctuation\">.<\/span>warning<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;High load average: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>load_avg<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> (CPUs: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>cpu_count<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">)&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n                self<span class=\"token punctuation\">.<\/span>restart_service<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;nginx&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>            cpu_percent <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">float<\/span><span class=\"token punctuation\">(<\/span>subprocess<span class=\"token punctuation\">.<\/span>check_output<span class=\"token punctuation\">(<\/span><br \/>\n                <span class=\"token string\">&#034;top -bn1 | grep &#039;Cpu(s)&#039; | sed &#039;s\/.*, *\\\\\\\\([0-9.]*\\\\\\\\)%* id.*\/\\\\\\\\1\/&#039; | awk &#039;{print 100 &#8211; $1}&#039;&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> cpu_percent <span class=\"token operator\">&gt;<\/span> self<span class=\"token punctuation\">.<\/span>thresholds<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;cpu&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                logging<span class=\"token punctuation\">.<\/span>warning<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;High CPU usage: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>cpu_percent<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">%&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n                self<span class=\"token punctuation\">.<\/span>kill_top_process<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;cpu&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">True<\/span><br \/>\n        <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;CPU check failed: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">check_memory<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            mem_info <span class=\"token operator\">&#061;<\/span> subprocess<span class=\"token punctuation\">.<\/span>check_output<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;free -m&#034;<\/span><span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>decode<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>split<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;\\\\n&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>split<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            total <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">(<\/span>mem_info<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            used <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">int<\/span><span class=\"token punctuation\">(<\/span>mem_info<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            percent <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">(<\/span>used <span class=\"token operator\">\/<\/span> total<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">*<\/span> <span class=\"token number\">100<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> percent <span class=\"token operator\">&gt;<\/span> self<span class=\"token punctuation\">.<\/span>thresholds<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;memory&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                logging<span class=\"token punctuation\">.<\/span>warning<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;High memory usage: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>percent<span class=\"token punctuation\">:<\/span><span class=\"token format-spec\">.1f<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">%&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n                self<span class=\"token punctuation\">.<\/span>kill_top_process<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;memory&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">True<\/span><br \/>\n        <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Memory check failed: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">kill_top_process<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> resource<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> resource <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;cpu&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                cmd <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;ps -eo pid,%cpu,comm &#8211;sort&#061;-%cpu | head -n 2 | tail -n 1 | awk &#039;{print $1}&#039;&#034;<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                cmd <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;ps -eo pid,%mem,comm &#8211;sort&#061;-%mem | head -n 2 | tail -n 1 | awk &#039;{print $1}&#039;&#034;<\/span><\/p>\n<p>            pid <span class=\"token operator\">&#061;<\/span> subprocess<span class=\"token punctuation\">.<\/span>check_output<span class=\"token punctuation\">(<\/span>cmd<span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>decode<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>strip<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> pid<span class=\"token punctuation\">:<\/span><br \/>\n                logging<span class=\"token punctuation\">.<\/span>warning<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Killing top <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>resource<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> process: PID <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>pid<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n                subprocess<span class=\"token punctuation\">.<\/span>call<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;kill -9 <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>pid<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">True<\/span><br \/>\n        <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Failed to kill process: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">restart_service<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> service<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>info<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Restarting service: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>service<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            subprocess<span class=\"token punctuation\">.<\/span>call<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;systemctl restart <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>service<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">,<\/span> shell<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">True<\/span><br \/>\n        <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>error<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Failed to restart service: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">run_checks<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">while<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            timestamp <span class=\"token operator\">&#061;<\/span> datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>strftime<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#039;%Y-%m-%d %H:%M:%S&#039;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            logging<span class=\"token punctuation\">.<\/span>info<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;Running health checks at <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>timestamp<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            cpu_ok <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>check_cpu<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            mem_ok <span class=\"token operator\">&#061;<\/span> self<span class=\"token punctuation\">.<\/span>check_memory<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> cpu_ok <span class=\"token keyword\">and<\/span> mem_ok<span class=\"token punctuation\">:<\/span><br \/>\n                logging<span class=\"token punctuation\">.<\/span>info<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;All checks passed&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            time<span class=\"token punctuation\">.<\/span>sleep<span class=\"token punctuation\">(<\/span><span class=\"token number\">60<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#039;__main__&#039;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    healer <span class=\"token operator\">&#061;<\/span> AutoHealer<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    healer<span class=\"token punctuation\">.<\/span>run_checks<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>6. \u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h3>\n<h4>6.1 \u7535\u5546\u5927\u4fc3\u671f\u95f4\u670d\u52a1\u5668\u6269\u5bb9<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a; \u67d0\u7535\u5546\u5e73\u53f0\u9884\u8ba1\u5728\u53cc11\u671f\u95f4\u6d41\u91cf\u5c06\u589e\u957f5-10\u500d&#xff0c;\u9700\u8981\u63d0\u524d\u505a\u597d\u670d\u52a1\u5668\u6269\u5bb9\u51c6\u5907\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<li>\n<p>\u5bb9\u91cf\u8bc4\u4f30&#xff1a;<\/p>\n<ul>\n<li>\u57fa\u4e8e\u5386\u53f2\u6570\u636e\u9884\u6d4b\u5cf0\u503cQPS<\/li>\n<li>\u4f7f\u7528\u538b\u529b\u6d4b\u8bd5\u786e\u5b9a\u5355\u673a\u627f\u8f7d\u80fd\u529b<\/li>\n<li>\u8ba1\u7b97\u6240\u9700\u670d\u52a1\u5668\u6570\u91cf&#xff0c;\u9884\u755930%\u7f13\u51b2<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u81ea\u52a8\u5316\u6269\u5bb9\u65b9\u6848&#xff1a;<\/p>\n<p> <span class=\"token comment\"># \u4f7f\u7528Terraform\u521b\u5efa\u81ea\u52a8\u6269\u5bb9\u811a\u672c<\/span><br \/>\nresource <span class=\"token string\">&#034;aws_autoscaling_group&#034;<\/span> <span class=\"token string\">&#034;web&#034;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n  name                 <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;web-asg&#034;<\/span><br \/>\n  max_size             <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">50<\/span><br \/>\n  min_size             <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><br \/>\n  desired_capacity     <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">15<\/span><br \/>\n  vpc_zone_identifier  <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>aws_subnet.public1.id, aws_subnet.public2.id<span class=\"token punctuation\">]<\/span><\/p>\n<p>  launch_template <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">id<\/span>      <span class=\"token operator\">&#061;<\/span> aws_launch_template.web.id<br \/>\n    version <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;<span class=\"token variable\">$Latest<\/span>&#034;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><\/p>\n<p>  target_group_arns <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>aws_lb_target_group.web.arn<span class=\"token punctuation\">]<\/span><\/p>\n<p>  scaling_policy <span class=\"token punctuation\">{<\/span><br \/>\n    name               <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;scale-up&#034;<\/span><br \/>\n    scaling_adjustment <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">2<\/span><br \/>\n    adjustment_type    <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;ChangeInCapacity&#034;<\/span><br \/>\n    cooldown          <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">300<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span>\n <\/li>\n<li>\n<p>\u76d1\u63a7\u6307\u6807\u8bbe\u7f6e&#xff1a;<\/p>\n<ul>\n<li>CPU\u4f7f\u7528\u7387 &gt; 70%\u6301\u7eed5\u5206\u949f\u89e6\u53d1\u6269\u5bb9<\/li>\n<li>\u5e73\u5747\u54cd\u5e94\u65f6\u95f4 &gt; 500ms\u89e6\u53d1\u6269\u5bb9<\/li>\n<li>4xx\/5xx\u9519\u8bef\u7387 &gt; 1%\u89e6\u53d1\u544a\u8b66<\/li>\n<\/ul>\n<\/li>\n<h4>6.2 \u6570\u636e\u5e93\u670d\u52a1\u5668\u6027\u80fd\u4f18\u5316<\/h4>\n<p>\u573a\u666f\u63cf\u8ff0&#xff1a; MySQL\u6570\u636e\u5e93\u670d\u52a1\u5668\u5728\u4e1a\u52a1\u9ad8\u5cf0\u671f\u51fa\u73b0\u67e5\u8be2\u7f13\u6162\u95ee\u9898&#xff0c;\u9700\u8981\u4f18\u5316\u3002<\/p>\n<p>\u4f18\u5316\u6b65\u9aa4&#xff1a;<\/p>\n<li>\n<p>\u6162\u67e5\u8be2\u5206\u6790&#xff1a;<\/p>\n<p> <span class=\"token comment\">&#8212; \u542f\u7528\u6162\u67e5\u8be2\u65e5\u5fd7<\/span><br \/>\n<span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> slow_query_log <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;ON&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> long_query_time <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">SET<\/span> <span class=\"token keyword\">GLOBAL<\/span> log_queries_not_using_indexes <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#039;ON&#039;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u5206\u6790\u6162\u67e5\u8be2<\/span><br \/>\nmysqldumpslow <span class=\"token operator\">&#8211;<\/span>s t <span class=\"token operator\">\/<\/span>var<span class=\"token operator\">\/<\/span>log<span class=\"token operator\">\/<\/span>mysql<span class=\"token operator\">\/<\/span>mysql<span class=\"token operator\">&#8211;<\/span>slow<span class=\"token punctuation\">.<\/span>log\n <\/li>\n<li>\n<p>\u7d22\u5f15\u4f18\u5316&#xff1a;<\/p>\n<p> <span class=\"token comment\">&#8212; \u6dfb\u52a0\u7f3a\u5931\u7684\u7d22\u5f15<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> orders <span class=\"token keyword\">ADD<\/span> <span class=\"token keyword\">INDEX<\/span> idx_customer_status <span class=\"token punctuation\">(<\/span>customer_id<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">status<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u4f18\u5316\u73b0\u6709\u7d22\u5f15<\/span><br \/>\n<span class=\"token keyword\">ALTER<\/span> <span class=\"token keyword\">TABLE<\/span> products <span class=\"token keyword\">DROP<\/span> <span class=\"token keyword\">INDEX<\/span> idx_name<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">ADD<\/span> <span class=\"token keyword\">INDEX<\/span> idx_name_category <span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> category<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <\/li>\n<li>\n<p>\u914d\u7f6e\u8c03\u4f18&#xff1a;<\/p>\n<p> # my.cnf \u5173\u952e\u53c2\u6570\u8c03\u6574<br \/>\n[mysqld]<br \/>\ninnodb_buffer_pool_size &#061; 12G  # \u603b\u5185\u5b58\u768470-80%<br \/>\ninnodb_log_file_size &#061; 2G<br \/>\ninnodb_flush_log_at_trx_commit &#061; 2  # \u5728\u53ef\u63a5\u53d7\u5c11\u91cf\u6570\u636e\u4e22\u5931\u7684\u60c5\u51b5\u4e0b<br \/>\nquery_cache_size &#061; 0  # \u5bf9\u4e8e\u9ad8\u5e76\u53d1\u5199\u5165\u7981\u7528\u67e5\u8be2\u7f13\u5b58\n <\/li>\n<h3>7. \u5de5\u5177\u548c\u8d44\u6e90\u63a8\u8350<\/h3>\n<h4>7.1 \u5b66\u4e60\u8d44\u6e90\u63a8\u8350<\/h4>\n<h5>7.1.1 \u4e66\u7c4d\u63a8\u8350<\/h5>\n<ul>\n<li>\u300aLinux\u670d\u52a1\u5668\u8fd0\u7ef4\u5b9e\u6218\u300b- \u5218\u9044<\/li>\n<li>\u300aSite Reliability Engineering\u300b- Google SRE\u56e2\u961f<\/li>\n<li>\u300a\u51e4\u51f0\u9879\u76ee&#xff1a;\u4e00\u4e2aIT\u8fd0\u7ef4\u7684\u4f20\u5947\u6545\u4e8b\u300b- Gene Kim<\/li>\n<\/ul>\n<h5>7.1.2 \u5728\u7ebf\u8bfe\u7a0b<\/h5>\n<ul>\n<li>Linux Academy\u7684&#034;Linux\u670d\u52a1\u5668\u7ba1\u7406&#034;\u8bfe\u7a0b<\/li>\n<li>Coursera\u7684&#034;Google IT Automation with Python&#034;<\/li>\n<li>Udemy\u7684&#034;DevOps\u4e0eSRE\u5b9e\u6218&#034;<\/li>\n<\/ul>\n<h5>7.1.3 \u6280\u672f\u535a\u5ba2\u548c\u7f51\u7ad9<\/h5>\n<ul>\n<li>Linux Performance<\/li>\n<li>DigitalOcean\u793e\u533a\u6559\u7a0b<\/li>\n<li>Red Hat\u5b98\u65b9\u6587\u6863<\/li>\n<\/ul>\n<h4>7.2 \u5f00\u53d1\u5de5\u5177\u6846\u67b6\u63a8\u8350<\/h4>\n<h5>7.2.1 IDE\u548c\u7f16\u8f91\u5668<\/h5>\n<ul>\n<li>VS Code &#043; Remote-SSH\u6269\u5c55<\/li>\n<li>JetBrains\u7cfb\u5217\u5de5\u5177(\u5982PyCharm, GoLand)<\/li>\n<li>Vim\/Nano(\u7528\u4e8e\u5feb\u901f\u670d\u52a1\u5668\u7f16\u8f91)<\/li>\n<\/ul>\n<h5>7.2.2 \u8c03\u8bd5\u548c\u6027\u80fd\u5206\u6790\u5de5\u5177<\/h5>\n<ul>\n<li>\u6027\u80fd\u5206\u6790&#xff1a;perf, strace, dtrace<\/li>\n<li>\u7f51\u7edc\u8c03\u8bd5&#xff1a;tcpdump, Wireshark, nmap<\/li>\n<li>\u7cfb\u7edf\u76d1\u63a7&#xff1a;htop, glances, netdata<\/li>\n<\/ul>\n<h5>7.2.3 \u76f8\u5173\u6846\u67b6\u548c\u5e93<\/h5>\n<ul>\n<li>\u914d\u7f6e\u7ba1\u7406&#xff1a;Ansible, Puppet, Chef<\/li>\n<li>\u5bb9\u5668\u7f16\u6392&#xff1a;Kubernetes, Docker Swarm<\/li>\n<li>\u76d1\u63a7\u544a\u8b66&#xff1a;Prometheus, Grafana, Zabbix<\/li>\n<\/ul>\n<h4>7.3 \u76f8\u5173\u8bba\u6587\u8457\u4f5c\u63a8\u8350<\/h4>\n<h5>7.3.1 \u7ecf\u5178\u8bba\u6587<\/h5>\n<ul>\n<li>\u201cThe Google File System\u201d &#8211; Sanjay Ghemawat\u7b49<\/li>\n<li>\u201cMapReduce: Simplified Data Processing on Large Clusters\u201d &#8211; Jeffrey Dean\u7b49<\/li>\n<li>\u201cBorg, Omega, and Kubernetes\u201d &#8211; Brendan Burns\u7b49<\/li>\n<\/ul>\n<h5>7.3.2 \u6700\u65b0\u7814\u7a76\u6210\u679c<\/h5>\n<ul>\n<li>\u201cSREcon\u4f1a\u8bae\u8bba\u6587\u96c6\u201d<\/li>\n<li>USENIX ATC\u548cOSDI\u4f1a\u8bae\u4e2d\u5173\u4e8e\u5927\u89c4\u6a21\u7cfb\u7edf\u8fd0\u7ef4\u7684\u8bba\u6587<\/li>\n<li>CNCF(\u4e91\u539f\u751f\u8ba1\u7b97\u57fa\u91d1\u4f1a)\u6280\u672f\u62a5\u544a<\/li>\n<\/ul>\n<h5>7.3.3 \u5e94\u7528\u6848\u4f8b\u5206\u6790<\/h5>\n<ul>\n<li>Netflix\u7684Chaos Engineering\u5b9e\u8df5<\/li>\n<li>Airbnb\u7684\u5fae\u670d\u52a1\u8fd0\u7ef4\u7ecf\u9a8c<\/li>\n<li>\u963f\u91cc\u5df4\u5df4\u53cc11\u6280\u672f\u4fdd\u969c\u65b9\u6848<\/li>\n<\/ul>\n<h3>8. \u603b\u7ed3&#xff1a;\u672a\u6765\u53d1\u5c55\u8d8b\u52bf\u4e0e\u6311\u6218<\/h3>\n<p>\u670d\u52a1\u5668\u8fd0\u7ef4\u9886\u57df\u6b63\u7ecf\u5386\u7740\u5feb\u901f\u53d8\u9769&#xff0c;\u4ee5\u4e0b\u662f\u672a\u6765\u51e0\u5e74\u7684\u53d1\u5c55\u8d8b\u52bf\u4e0e\u6311\u6218&#xff1a;<\/p>\n<li>\n<p>\u4e91\u539f\u751f\u8fd0\u7ef4&#xff1a;<\/p>\n<ul>\n<li>Kubernetes\u6210\u4e3a\u4e8b\u5b9e\u6807\u51c6<\/li>\n<li>\u670d\u52a1\u7f51\u683c(Service Mesh)\u6280\u672f\u666e\u53ca<\/li>\n<li>\u6df7\u5408\u4e91\/\u591a\u4e91\u73af\u5883\u7ba1\u7406\u6311\u6218<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>AIOps\u7684\u5174\u8d77&#xff1a;<\/p>\n<ul>\n<li>\u673a\u5668\u5b66\u4e60\u5e94\u7528\u4e8e\u5f02\u5e38\u68c0\u6d4b<\/li>\n<li>\u81ea\u52a8\u5316\u6839\u56e0\u5206\u6790<\/li>\n<li>\u9884\u6d4b\u6027\u7ef4\u62a4<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5b89\u5168\u8fd0\u7ef4\u4e00\u4f53\u5316&#xff1a;<\/p>\n<ul>\n<li>DevSecOps\u5b9e\u8df5\u666e\u53ca<\/li>\n<li>\u96f6\u4fe1\u4efb\u67b6\u6784\u5b9e\u65bd<\/li>\n<li>\u5408\u89c4\u6027\u81ea\u52a8\u5316\u68c0\u67e5<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8fb9\u7f18\u8ba1\u7b97\u8fd0\u7ef4&#xff1a;<\/p>\n<ul>\n<li>\u5206\u5e03\u5f0f\u8282\u70b9\u7ba1\u7406<\/li>\n<li>\u4f4e\u5ef6\u8fdf\u573a\u666f\u4f18\u5316<\/li>\n<li>\u8fb9\u7f18-\u4e91\u7aef\u534f\u540c<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u53ef\u6301\u7eed\u8fd0\u7ef4&#xff1a;<\/p>\n<ul>\n<li>\u80fd\u6548\u4f18\u5316\u4e0e\u78b3\u6392\u653e\u76d1\u63a7<\/li>\n<li>\u7eff\u8272\u6570\u636e\u4e2d\u5fc3\u5b9e\u8df5<\/li>\n<li>\u8d44\u6e90\u5229\u7528\u7387\u6700\u5927\u5316<\/li>\n<\/ul>\n<\/li>\n<p>\u9762\u5bf9\u8fd9\u4e9b\u8d8b\u52bf&#xff0c;\u8fd0\u7ef4\u4eba\u5458\u9700\u8981\u6301\u7eed\u5b66\u4e60\u65b0\u6280\u672f&#xff0c;\u7279\u522b\u662f\u7f16\u7a0b\u80fd\u529b(Scripting, Go\/Python)\u3001\u4e91\u5e73\u53f0\u4e13\u4e1a\u77e5\u8bc6\u4ee5\u53ca\u6570\u636e\u5206\u6790\u6280\u80fd\u5c06\u6210\u4e3a\u6838\u5fc3\u7ade\u4e89\u529b\u3002<\/p>\n<h3>9. \u9644\u5f55&#xff1a;\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u7b54<\/h3>\n<p>Q1&#xff1a;\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u670d\u52a1\u5668\u6027\u80fd\u74f6\u9888&#xff1f; A&#xff1a;\u53ef\u4ee5\u4f7f\u7528&#034;USE\u65b9\u6cd5&#034;(Utilization, Saturation, Errors)&#xff1a;<\/p>\n<li>\u68c0\u67e5\u5404\u8d44\u6e90(CPU\u3001\u5185\u5b58\u3001\u78c1\u76d8\u3001\u7f51\u7edc)\u5229\u7528\u7387<\/li>\n<li>\u67e5\u770b\u662f\u5426\u6709\u8d44\u6e90\u8fbe\u5230\u9971\u548c(\u961f\u5217\u957f\u5ea6\u3001\u7b49\u5f85\u65f6\u95f4)<\/li>\n<li>\u68c0\u67e5\u9519\u8bef\u8ba1\u6570(\u78c1\u76d8\u9519\u8bef\u3001\u7f51\u7edc\u4e22\u5305\u7b49)<\/li>\n<p>Q2&#xff1a;\u670d\u52a1\u5668\u5b89\u5168\u52a0\u56fa\u6709\u54ea\u4e9b\u57fa\u672c\u63aa\u65bd&#xff1f; A&#xff1a;\u57fa\u7840\u5b89\u5168\u52a0\u56fa\u5305\u62ec&#xff1a;<\/p>\n<li>\u6700\u5c0f\u5316\u5b89\u88c5&#xff0c;\u5173\u95ed\u4e0d\u9700\u8981\u7684\u670d\u52a1<\/li>\n<li>\u914d\u7f6e\u9632\u706b\u5899\u89c4\u5219(\u5982iptables\/nftables)<\/li>\n<li>\u5b9a\u671f\u66f4\u65b0\u7cfb\u7edf\u548c\u8f6f\u4ef6\u5305<\/li>\n<li>\u7981\u7528root\u8fdc\u7a0b\u767b\u5f55&#xff0c;\u4f7f\u7528SSH\u5bc6\u94a5\u8ba4\u8bc1<\/li>\n<li>\u914d\u7f6e\u65e5\u5fd7\u96c6\u4e2d\u6536\u96c6\u548c\u76d1\u63a7<\/li>\n<p>Q3&#xff1a;\u5982\u4f55\u8bbe\u8ba1\u9ad8\u53ef\u7528\u7684\u670d\u52a1\u5668\u67b6\u6784&#xff1f; A&#xff1a;\u9ad8\u53ef\u7528\u8bbe\u8ba1\u539f\u5219&#xff1a;<\/p>\n<li>\u6d88\u9664\u5355\u70b9\u6545\u969c(\u591a\u5b9e\u4f8b\u3001\u591a\u53ef\u7528\u533a\u90e8\u7f72)<\/li>\n<li>\u5b9e\u73b0\u81ea\u52a8\u6545\u969c\u8f6c\u79fb(\u5982Keepalived&#043;VIP)<\/li>\n<li>\u8bbe\u8ba1\u4f18\u96c5\u964d\u7ea7\u65b9\u6848<\/li>\n<li>\u5b9e\u65bd\u5b8c\u5584\u7684\u76d1\u63a7\u548c\u544a\u8b66<\/li>\n<li>\u5b9a\u671f\u8fdb\u884c\u6545\u969c\u6f14\u7ec3<\/li>\n<p>Q4&#xff1a;\u670d\u52a1\u5668\u65e5\u5fd7\u592a\u591a&#xff0c;\u5982\u4f55\u6709\u6548\u7ba1\u7406&#xff1f; A&#xff1a;\u65e5\u5fd7\u7ba1\u7406\u6700\u4f73\u5b9e\u8df5&#xff1a;<\/p>\n<li>\u5b9e\u65bd\u65e5\u5fd7\u5206\u7ea7(DEBUG, INFO, WARN, ERROR)<\/li>\n<li>\u4f7f\u7528ELK(Elasticsearch&#043;Logstash&#043;Kibana)\u6216\u7b49\u6548\u65b9\u6848<\/li>\n<li>\u8bbe\u7f6e\u5408\u7406\u7684\u65e5\u5fd7\u8f6e\u8f6c\u7b56\u7565(logrotate)<\/li>\n<li>\u5173\u952e\u65e5\u5fd7\u8bbe\u7f6e\u5b9e\u65f6\u544a\u8b66<\/li>\n<li>\u957f\u671f\u65e5\u5fd7\u5f52\u6863\u5230\u5bf9\u8c61\u5b58\u50a8<\/li>\n<h3>10. \u6269\u5c55\u9605\u8bfb &amp; \u53c2\u8003\u8d44\u6599<\/h3>\n<li>Linux Performance<\/li>\n<li>Google SRE Books<\/li>\n<li>CNCF\u6280\u672f\u5168\u666f\u56fe<\/li>\n<li>AWS\u67b6\u6784\u4e2d\u5fc3<\/li>\n<li>Microsoft 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