{"id":66173,"date":"2026-01-26T11:49:00","date_gmt":"2026-01-26T03:49:00","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/66173.html"},"modified":"2026-01-26T11:49:00","modified_gmt":"2026-01-26T03:49:00","slug":"redis-%e9%81%bf%e5%9d%91%e6%8c%87%e5%8d%97%ef%bc%9a%e4%bb%8e%e5%91%bd%e4%bb%a4%e5%88%b0%e4%b8%bb%e4%bb%8e%e7%9a%84%e5%85%a8%e9%93%be%e8%b7%af%e8%b8%a9%e5%9d%91%e5%ae%9e%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/66173.html","title":{"rendered":"Redis \u907f\u5751\u6307\u5357\uff1a\u4ece\u547d\u4ee4\u5230\u4e3b\u4ece\u7684\u5168\u94fe\u8def\u8e29\u5751\u5b9e\u5f55"},"content":{"rendered":"<h2>&#x1f6a8; Redis \u907f\u5751\u6307\u5357&#xff1a;\u4ece\u547d\u4ee4\u5230\u4e3b\u4ece\u7684\u5168\u94fe\u8def\u8e29\u5751\u5b9e\u5f55<\/h2>\n<p>\u4f5c\u4e3aJava\u540e\u7aef\u5f00\u53d1&#xff0c;Redis\u51e0\u4e4e\u662f\u6211\u4eec\u65e5\u5e38\u5f00\u53d1\u4e2d\u79bb\u4e0d\u5f00\u7684\u5de5\u5177&#xff0c;\u4f46\u5b83\u770b\u4f3c\u7b80\u5355\u7684API\u80cc\u540e&#xff0c;\u5374\u85cf\u7740\u65e0\u6570\u5bb9\u6613\u8e29\u4e2d\u7684\u5751\u3002\u672c\u6587\u5c06\u4ece\u547d\u4ee4\u4f7f\u7528\u3001\u6301\u4e45\u5316\u3001\u4e3b\u4ece\u590d\u5236\u4e09\u4e2a\u6838\u5fc3\u7ef4\u5ea6&#xff0c;\u7ed3\u5408\u751f\u4ea7\u73af\u5883\u7684\u771f\u5b9e\u573a\u666f\u548c\u539f\u7406\u56fe\u89e3&#xff0c;\u4e3a\u4f60\u68b3\u7406Redis\u4ece\u5165\u95e8\u5230\u8e29\u5751\u7684\u5b8c\u6574\u907f\u5751\u624b\u518c\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001Redis\u547d\u4ee4\u7684\u201c\u9690\u5f62\u9677\u9631\u201d<\/h3>\n<h4>1. SET\u547d\u4ee4&#xff1a;\u8fc7\u671f\u65f6\u95f4\u7684\u201c\u9690\u5f62\u64e6\u9664\u201d<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u4f60\u7528SET key value EX 3600\u7ed9key\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4&#xff0c;\u540e\u7eed\u4ec5\u7528SET key new_value\u4fee\u6539\u503c\u65f6&#xff0c;\u4f1a\u53d1\u73b0\u8fc7\u671f\u65f6\u95f4\u88ab\u76f4\u63a5\u6e05\u7a7a\u3002<br \/>\n\u539f\u7406&#xff1a;Redis\u7684SET\u547d\u4ee4\u5982\u679c\u4e0d\u643a\u5e26\u8fc7\u671f\u65f6\u95f4\u53c2\u6570&#xff0c;\u4f1a\u81ea\u52a8\u64e6\u9664\u8be5key\u7684\u8fc7\u671f\u65f6\u95f4&#xff0c;\u8fd9\u662f\u5f88\u591a\u5f00\u53d1\u4eba\u5458\u5bb9\u6613\u5ffd\u7565\u7684\u7ec6\u8282\u3002<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u6bcf\u6b21\u4fee\u6539\u503c\u65f6\u90fd\u5e26\u4e0a\u8fc7\u671f\u65f6\u95f4&#xff1a;SET key new_value EX 3600<\/li>\n<li>\u4f7f\u7528SETNX&#043;EXPIRE\u7ec4\u5408&#xff08;\u6ce8\u610f\u539f\u5b50\u6027\u95ee\u9898&#xff09;<\/li>\n<li>\u63a8\u8350\u4f7f\u7528Redis 2.6.12&#043;\u7248\u672c\u7684SET\u547d\u4ee4\u6269\u5c55\u53c2\u6570<\/li>\n<\/ul>\n<hr \/>\n<h4>2. DEL\u547d\u4ee4&#xff1a;\u5927key\u5bfc\u81f4\u7684\u4e3b\u7ebf\u7a0b\u963b\u585e<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u5220\u9664\u4e00\u4e2a\u5305\u542b\u767e\u4e07\u7ea7\u5143\u7d20\u7684List\u6216500MB\u7684String\u7c7b\u578bkey\u65f6&#xff0c;Redis\u4f1a\u51fa\u73b0\u660e\u663e\u5361\u987f\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>DEL key \u2192 \u904d\u5386\u975eString\u7c7b\u578b\u5143\u7d20 \u2192 \u91ca\u653e\u6bcf\u4e2a\u5143\u7d20\u5185\u5b58 \u2192 \u8017\u65f6O(M)<br \/>\nDEL bigString \u2192 \u91ca\u653e\u5927\u5185\u5b58\u7ed9\u64cd\u4f5c\u7cfb\u7edf \u2192 \u8017\u65f6\u53d8\u957f<\/p>\n<ul>\n<li>\u5220\u9664String\u7c7b\u578bkey\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(1)&#xff0c;\u4f46\u5927\u4f53\u79efString\u91ca\u653e\u5185\u5b58\u8017\u65f6\u8f83\u957f<\/li>\n<li>\u5220\u9664List\/Hash\/Set\/ZSet\u7c7b\u578bkey\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(M)&#xff0c;M\u4e3a\u5143\u7d20\u6570\u91cf&#xff0c;\u5143\u7d20\u8d8a\u591a\u8017\u65f6\u8d8a\u957f<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u4f7f\u7528Redis 4.0&#043;\u7684UNLINK\u547d\u4ee4\u66ff\u4ee3DEL&#xff0c;\u5b9e\u73b0\u6e10\u8fdb\u5f0f\u5220\u9664<\/li>\n<li>\u63d0\u524d\u62c6\u5206\u5927key&#xff0c;\u907f\u514d\u521b\u5efa\u5355key\u8fc7\u5927\u7684\u573a\u666f<\/li>\n<li>\u5bf9\u4e8e\u8d85\u5927key&#xff0c;\u4f7f\u7528SCAN\u547d\u4ee4\u5206\u6279\u5220\u9664\u5143\u7d20<\/li>\n<\/ul>\n<hr \/>\n<h4>3. RANDOMKEY\u547d\u4ee4&#xff1a;Slave\u8282\u70b9\u7684\u201c\u6b7b\u5faa\u73af\u201d\u98ce\u9669<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u5728Slave\u8282\u70b9\u6267\u884cRANDOMKEY\u65f6&#xff0c;\u5982\u679cRedis\u4e2d\u5b58\u5728\u5927\u91cf\u8fc7\u671fkey&#xff0c;\u53ef\u80fd\u5bfc\u81f4Slave\u5b9e\u4f8b\u5361\u6b7b\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>Master\u6267\u884cRANDOMKEY&#xff1a;<br \/>\n\u968f\u673a\u53d6key \u2192 \u68c0\u67e5\u8fc7\u671f \u2192 \u8fc7\u671f\u5219\u5220\u9664 \u2192 \u7ee7\u7eed\u53d6key \u2192 \u8fd4\u56de\u672a\u8fc7\u671fkey<\/p>\n<p>Slave\u6267\u884cRANDOMKEY&#xff08;Redis 5.0\u524d&#xff09;&#xff1a;<br \/>\n\u968f\u673a\u53d6key \u2192 \u68c0\u67e5\u8fc7\u671f \u2192 \u8fc7\u671f\u5219\u8df3\u8fc7 \u2192 \u7ee7\u7eed\u53d6key \u2192 \u65e0\u9650\u5faa\u73af&#xff08;\u82e5\u6240\u6709key\u8fc7\u671f&#xff09;<\/p>\n<ul>\n<li>Master\u8282\u70b9\u4f1a\u60f0\u6027\u6e05\u7406\u8fc7\u671fkey&#xff0c;\u4f46Slave\u8282\u70b9\u4e0d\u4f1a\u4e3b\u52a8\u6e05\u7406&#xff0c;\u4ec5\u4f9d\u8d56Master\u7684DEL\u547d\u4ee4<\/li>\n<li>Redis 5.0\u4e4b\u524d&#xff0c;Slave\u6267\u884cRANDOMKEY\u65f6\u4f1a\u4e0d\u65ad\u968f\u673a\u53d6key\u76f4\u5230\u627e\u5230\u672a\u8fc7\u671f\u7684&#xff0c;\u82e5\u6240\u6709key\u90fd\u8fc7\u671f\u5219\u9677\u5165\u6b7b\u5faa\u73af<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u5347\u7ea7Redis\u52305.0&#043;\u7248\u672c&#xff08;\u8be5\u7248\u672c\u9650\u5236Slave\u6700\u591a\u5c1d\u8bd5100\u6b21&#xff09;<\/li>\n<li>\u907f\u514d\u5728Slave\u8282\u70b9\u6267\u884cRANDOMKEY\u547d\u4ee4<\/li>\n<li>\u5b9a\u671f\u6e05\u7406\u8fc7\u671fkey&#xff0c;\u51cf\u5c11\u8fc7\u671fkey\u7684\u6570\u91cf<\/li>\n<\/ul>\n<hr \/>\n<h4>4. SETBIT\u547d\u4ee4&#xff1a;O(1)\u590d\u6742\u5ea6\u80cc\u540e\u7684OOM\u98ce\u9669<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u6267\u884cSETBIT testkey 2^30 1\u65f6&#xff0c;Redis\u4f1a\u7a81\u7136\u5360\u7528130MB\u5185\u5b58&#xff0c;\u751a\u81f3\u5bfc\u81f4OOM\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>SETBIT testkey 10 1 \u2192 \u5206\u914d11\u4f4d\u5185\u5b58&#xff08;\u7ea62\u5b57\u8282&#xff09;<br \/>\nSETBIT testkey 2^30 1 \u2192 \u5206\u914d2^30&#043;1\u4f4d\u5185\u5b58&#xff08;\u7ea6134MB&#xff09;<\/p>\n<ul>\n<li>SETBIT\u4f1a\u6839\u636eoffset\u5206\u914d\u5185\u5b58&#xff0c;\u5373\u4f7f\u5927\u90e8\u5206\u4f4d\u90fd\u662f0&#xff0c;\u4e5f\u4f1a\u5360\u7528\u5b8c\u6574\u7684\u5185\u5b58\u7a7a\u95f4&#xff0c;\u6700\u5927\u652f\u63012^32\u4f4d&#xff08;\u7ea6512MB&#xff09;<\/li>\n<li>\u8fd9\u79cd\u7c7b\u578b\u7684key\u4e5f\u662f\u5178\u578b\u7684bigkey&#xff0c;\u9664\u4e86\u5206\u914d\u5185\u5b58\u5f71\u54cd\u6027\u80fd\u4e4b\u5916&#xff0c;\u5728\u5220\u9664\u5b83\u65f6&#xff0c;\u8017\u65f6\u540c\u6837\u4e5f\u4f1a\u53d8\u957f<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u8fc7\u5927\u7684offset&#xff0c;\u63d0\u524d\u8bc4\u4f30bitmap\u7684\u5185\u5b58\u5360\u7528<\/li>\n<li>\u5c06\u5927bitmap\u62c6\u5206\u4e3a\u591a\u4e2a\u5c0fbitmap<\/li>\n<li>\u5bf9\u4e8e\u6d77\u91cf\u4f4d\u5b58\u50a8\u573a\u666f&#xff0c;\u8003\u8651\u4f7f\u7528HyperLogLog\u7b49\u66f4\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784<\/li>\n<\/ul>\n<hr \/>\n<h4>5. MONITOR\u547d\u4ee4&#xff1a;\u9ad8\u5e76\u53d1\u4e0b\u7684OOM\u9677\u9631<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u5f00\u542fMONITOR\u547d\u4ee4&#xff0c;Redis\u4f1a\u51fa\u73b0\u5185\u5b58\u6301\u7eed\u589e\u957f&#xff0c;\u6700\u7ec8\u5bfc\u81f4OOM\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>App \u2192 Redis (MONITOR) \u2192 \u8f93\u51fa\u7f13\u51b2\u533a&#xff08;\u6301\u7eed\u589e\u957f&#xff09;<\/p>\n<ul>\n<li>MONITOR\u4f1a\u5c06\u6240\u6709\u547d\u4ee4\u5199\u5165\u5ba2\u6237\u7aef\u8f93\u51fa\u7f13\u51b2\u533a&#xff0c;\u9ad8\u5e76\u53d1\u4e0b\u7f13\u51b2\u533a\u4f1a\u65e0\u9650\u5236\u589e\u957f&#xff0c;\u5360\u7528\u5927\u91cf\u5185\u5b58<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u7981\u6b62\u5728\u751f\u4ea7\u73af\u5883\u957f\u65f6\u95f4\u5f00\u542fMONITOR&#xff0c;\u4ec5\u7528\u4e8e\u4e34\u65f6\u8c03\u8bd5<\/li>\n<li>\u4f7f\u7528redis-cli &#8211;stat\u6216Prometheus&#043;Grafana\u7b49\u8f7b\u91cf\u7ea7\u76d1\u63a7\u5de5\u5177<\/li>\n<li>\u914d\u7f6eclient-output-buffer-limit\u9650\u5236\u5ba2\u6237\u7aef\u7f13\u51b2\u533a\u5927\u5c0f<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e8c\u3001\u6570\u636e\u6301\u4e45\u5316\u7684\u201c\u6697\u7901\u9669\u6ee9\u201d<\/h3>\n<h4>1. Master\u5b95\u673a&#xff0c;Slave\u6570\u636e\u4e5f\u4e22\u5931<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u91c7\u7528master-slave&#043;\u54e8\u5175\u67b6\u6784&#xff0c;\u4e14Master\u672a\u5f00\u542f\u6301\u4e45\u5316\u65f6&#xff0c;Master\u5b95\u673a\u540e\u88absupervisor\u81ea\u52a8\u91cd\u542f&#xff0c;\u4f1a\u5bfc\u81f4Slave\u6570\u636e\u88ab\u6e05\u7a7a\u3002<br \/>\n\u539f\u7406\u6d41\u7a0b&#xff1a;<\/p>\n<li>Master\u5b95\u673a&#xff0c;\u54e8\u5175\u8fd8\u672a\u53d1\u8d77\u5207\u6362<\/li>\n<li>supervisor\u81ea\u52a8\u62c9\u8d77Master\u8fdb\u7a0b&#xff08;\u672a\u5f00\u542f\u6301\u4e45\u5316&#xff0c;\u542f\u52a8\u540e\u4e3a\u7a7a\u5b9e\u4f8b&#xff09;<\/li>\n<li>Slave\u5411Master\u53d1\u8d77\u5168\u91cf\u540c\u6b65&#xff0c;\u540c\u6b65\u7a7a\u6570\u636e<\/li>\n<li>Slave\u6e05\u7a7a\u81ea\u8eab\u6570\u636e&#xff0c;\u53d8\u6210\u7a7a\u5b9e\u4f8b<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<ul>\n<li>\u5fc5\u987b\u4e3aMaster\u5f00\u542f\u6301\u4e45\u5316&#xff08;\u81f3\u5c11\u5f00\u542fRDB&#xff09;<\/li>\n<li>\u8c03\u6574supervisor\u914d\u7f6e&#xff0c;\u589e\u52a0\u81ea\u52a8\u91cd\u542f\u5ef6\u8fdf&#xff0c;\u786e\u4fdd\u54e8\u5175\u5b8c\u6210\u4e3b\u4ece\u5207\u6362\u540e\u518d\u91cd\u542fMaster<\/li>\n<li>\u5f00\u542f\u534a\u540c\u6b65\u590d\u5236&#xff0c;\u786e\u4fdd\u6570\u636e\u5b89\u5168<\/li>\n<\/ul>\n<hr \/>\n<h4>2. AOF everysec&#xff1a;\u5e76\u975e\u7edd\u5bf9\u4e0d\u963b\u585e\u4e3b\u7ebf\u7a0b<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u914d\u7f6eAOF\u5237\u76d8\u7b56\u7565\u4e3aeverysec\u65f6&#xff0c;\u5728\u78c1\u76d8IO\u8d1f\u8f7d\u8fc7\u9ad8\u7684\u60c5\u51b5\u4e0b&#xff0c;Redis\u4e3b\u7ebf\u7a0b\u4ecd\u7136\u4f1a\u88ab\u963b\u585e\u3002<br \/>\nAOF\u4e09\u79cd\u5237\u76d8\u7b56\u7565&#xff1a;<\/p>\n<li>\u4e0d\u5f00\u542f&#xff1a;\u4e0d\u5237\u76d8&#xff0c;\u4f9d\u8d56\u64cd\u4f5c\u7cfb\u7edf\u5237\u76d8<\/li>\n<li>\u5f00\u542f&#xff0c;\u540c\u6b65\u6267\u884c&#xff1a;\u4e3b\u7ebf\u7a0b\u6267\u884cfsync\u65f6\u540c\u6b65\u5237\u76d8&#xff0c;\u65e0\u7f13\u5b58&#xff0c;\u6027\u80fd\u5dee\u4f46\u6570\u636e\u5b89\u5168<\/li>\n<li>\u5f00\u542f&#xff0c;\u5f02\u6b65\u6267\u884c&#xff08;everysec&#xff09;&#xff1a;\u540e\u53f0\u7ebf\u7a0b\u6bcf\u79d2\u6267\u884cfsync&#xff0c;\u5c06\u6570\u636e\u4eceos.cache\u5199\u5165\u78c1\u76d8<\/li>\n<p>\u963b\u585e\u6d41\u7a0b\u56fe\u89e3&#xff1a;<\/p>\n<p>App \u2192 Redis (\u4e3b\u7ebf\u7a0b) \u2192 AOF page cache \u2192 \u78c1\u76d8<br \/>\n               \u2193<br \/>\n          \u540e\u53f0\u7ebf\u7a0b&#xff08;\u6bcf\u79d2 fsync&#xff09;<\/p>\n<p>\u5f53\u78c1\u76d8IO\u8d1f\u8f7d\u8fc7\u9ad8\u65f6&#xff1a;<br \/>\n1. \u540e\u53f0\u7ebf\u7a0bfsync\u963b\u585e<br \/>\n2. \u4e3b\u7ebf\u7a0b\u5199AOF page cache\u524d\u68c0\u67e5fsync\u72b6\u6001<br \/>\n3. \u5982\u679cfsync\u672a\u5b8c\u6210\u4e14\u8d85\u8fc72\u79d2&#xff0c;\u4e3b\u7ebf\u7a0b\u5f3a\u5236\u5199AOF page cache<br \/>\n4. \u7531\u4e8efsync\u548cwrite\u4e92\u65a5&#xff0c;\u4e3b\u7ebf\u7a0b\u88ab\u963b\u585e<\/p>\n<p>\u89e3\u51b3\u65b9\u6848&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528\u9ad8\u6027\u80fdSSD\u78c1\u76d8&#xff0c;\u63d0\u5347IO\u6027\u80fd<\/li>\n<li>\u76d1\u63a7\u78c1\u76d8IO\u8d1f\u8f7d&#xff0c;\u53ca\u65f6\u6269\u5bb9\u6216\u4f18\u5316<\/li>\n<li>\u6838\u5fc3\u4e1a\u52a1\u573a\u666f\u53ef\u8003\u8651\u4f7f\u7528always\u7b56\u7565&#xff08;\u6027\u80fd\u8f83\u5dee\u4f46\u6570\u636e\u5b89\u5168&#xff09;<\/li>\n<\/ul>\n<hr \/>\n<h4>3. AOF everysec&#xff1a;\u6781\u7aef\u60c5\u51b5\u4e0b\u4e22\u59312\u79d2\u6570\u636e<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;Redis\u5b95\u673a\u540e&#xff0c;AOF\u6587\u4ef6\u4e22\u5931\u4e862\u79d2\u7684\u6570\u636e&#xff0c;\u800c\u975e\u9884\u671f\u76841\u79d2\u3002<br \/>\n\u539f\u7406&#xff1a;<\/p>\n<ul>\n<li>\u4e3b\u7ebf\u7a0b\u5728\u5199AOF page cache\u524d&#xff0c;\u4f1a\u68c0\u67e5\u4e0a\u6b21fsync\u7684\u65f6\u95f4<\/li>\n<li>\u5982\u679c\u8ddd\u79bb\u4e0a\u6b21fsync\u6210\u529f\u57282\u79d2\u5185&#xff0c;\u4e3b\u7ebf\u7a0b\u4f1a\u76f4\u63a5\u8fd4\u56de&#xff0c;\u4e0d\u5199AOF page cache<\/li>\n<li>\u82e5\u6b64\u65f6\u5b95\u673a&#xff0c;\u4f1a\u4e22\u5931\u8fd92\u79d2\u5185\u7684\u6570\u636e<br \/>\n\u8bbe\u8ba1\u6743\u8861&#xff1a;<br \/>\n\u8fd9\u662fRedis\u4f5c\u8005\u5bf9\u6027\u80fd\u548c\u6570\u636e\u5b89\u5168\u6027\u7684\u6743\u8861&#xff1a;<\/li>\n<li>\u4e3b\u7ebf\u7a0b\u7b49\u5f852\u79d2\u4e0d\u5199AOF page cache&#xff0c;\u662f\u4e3a\u4e86\u964d\u4f4e\u4e3b\u7ebf\u7a0b\u963b\u585e\u7684\u98ce\u9669<\/li>\n<li>\u4ee3\u4ef7\u662f\u5728\u6781\u7aef\u60c5\u51b5\u4e0b&#xff0c;\u6570\u636e\u4e22\u5931\u65f6\u95f4\u4ece1\u79d2\u589e\u52a0\u52302\u79d2<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u8981\u6c42\u6781\u9ad8\u7684\u573a\u666f&#xff0c;\u4f7f\u7528AOF always\u7b56\u7565<\/li>\n<li>\u7ed3\u5408\u54e8\u5175\u6216\u96c6\u7fa4\u5b9e\u73b0\u9ad8\u53ef\u7528&#xff0c;\u786e\u4fdd\u6570\u636e\u4e0d\u4e22\u5931<\/li>\n<\/ul>\n<hr \/>\n<h4>4. RDB\/AOF rewrite&#xff1a;\u5199\u65f6\u590d\u5236\u5bfc\u81f4\u7684OOM<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u6267\u884cRDB\u5feb\u7167\u6216AOF rewrite\u65f6&#xff0c;Redis\u5185\u5b58\u5360\u7528\u6025\u5267\u589e\u52a0&#xff0c;\u5bfc\u81f4OOM\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>App \u2192 Redis (\u4e3b\u8fdb\u7a0b) \u2192 fork \u2192 Redis (\u5b50\u8fdb\u7a0b)<br \/>\n          \u2193                          \u2193<br \/>\n       \u5199\u8bf7\u6c42 \u2192 Copy On Write \u2192 \u65b0\u5185\u5b58\u7533\u8bf7 \u2192 \u5185\u5b58\u5360\u7528\u98d9\u5347<\/p>\n<ul>\n<li>Redis\u4f1afork\u5b50\u8fdb\u7a0b\u6267\u884c\u6301\u4e45\u5316&#xff0c;\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b\u5171\u4eab\u5185\u5b58<\/li>\n<li>\u7236\u8fdb\u7a0b\u5904\u7406\u5199\u8bf7\u6c42\u65f6\u4f1a\u89e6\u53d1\u201c\u5199\u65f6\u590d\u5236\u201d&#xff0c;\u590d\u5236\u5185\u5b58\u9875\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u98d9\u5347<\/li>\n<li>\u5199\u591a\u8bfb\u5c11\u4e14QPS\u9ad8\u7684\u573a\u666f\u4e0b&#xff0c;\u5185\u5b58\u5360\u7528\u589e\u957f\u66f4\u5feb<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u7ed9Redis\u673a\u5668\u9884\u7559\u8db3\u591f\u7684\u5185\u5b58&#xff08;\u901a\u5e38\u5efa\u8bae\u9884\u755950%&#xff09;<\/li>\n<li>\u5728\u4f4e\u5cf0\u671f\u6267\u884cRDB\/AOF rewrite<\/li>\n<li>\u4f7f\u7528Redis 4.0&#043;\u7684\u6df7\u5408\u6301\u4e45\u5316&#xff0c;\u51cf\u5c11AOF\u6587\u4ef6\u5927\u5c0f<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001\u4e3b\u4ece\u590d\u5236\u7684\u201c\u8fde\u73af\u5751\u201d<\/h3>\n<h4>1. \u5f02\u6b65\u590d\u5236&#xff1a;\u6570\u636e\u4e22\u5931\u7684\u98ce\u9669<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;Master\u5b95\u673a\u65f6&#xff0c;\u90e8\u5206\u672a\u540c\u6b65\u5230Slave\u7684\u6570\u636e\u4f1a\u4e22\u5931&#xff0c;\u5bf9\u4e8e\u4f5c\u4e3a\u6570\u636e\u5e93\u6216\u5206\u5e03\u5f0f\u9501\u4f7f\u7528\u7684Redis\u5f71\u54cd\u8f83\u5927\u3002<br \/>\n\u539f\u7406&#xff1a;\u4e3b\u4ece\u590d\u5236\u9ed8\u8ba4\u91c7\u7528\u5f02\u6b65\u65b9\u5f0f&#xff0c;Master\u5904\u7406\u5b8c\u5199\u547d\u4ee4\u540e\u7acb\u5373\u8fd4\u56de\u5ba2\u6237\u7aef&#xff0c;\u4e0d\u7b49\u5f85Slave\u540c\u6b65\u5b8c\u6210\u3002<br \/>\n\u6570\u636e\u4e22\u5931\u9636\u6bb5&#xff1a;<\/p>\n<li>\u6570\u636e\u6301\u4e45\u5316\u5199\u78c1\u76d8\u9636\u6bb5&#xff1a;\u6301\u4e45\u5316\u8fc7\u7a0b\u4e2d\u5982\u679c\u5b95\u673a&#xff0c;\u6570\u636e\u4f1a\u5728\u6574\u4e2a\u96c6\u7fa4\u4e22\u5931<\/li>\n<li>\u6570\u636e\u540c\u6b65\u9636\u6bb5&#xff1a;\u6301\u4e45\u5316\u6210\u529f\u4f46\u4e3b\u4ece\u540c\u6b65\u672a\u5b8c\u6210\u65f6\u5b95\u673a&#xff0c;\u6570\u636e\u4ec5\u5728Slave\u8282\u70b9\u4e22\u5931<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<ul>\n<li>\u5f00\u542f\u534a\u540c\u6b65\u590d\u5236&#xff0c;\u786e\u4fdd\u81f3\u5c11\u6709\u4e00\u4e2aSlave\u540c\u6b65\u5b8c\u6210\u540e\u518d\u8fd4\u56de\u5ba2\u6237\u7aef<\/li>\n<li>\u4e3aMaster\u5f00\u542f\u6301\u4e45\u5316&#xff0c;\u907f\u514d\u91cd\u542f\u540e\u6570\u636e\u4e22\u5931<\/li>\n<\/ul>\n<hr \/>\n<h4>2. \u8fc7\u671fkey\u67e5\u8be2&#xff1a;\u4e3b\u4ece\u8fd4\u56de\u4e0d\u540c\u7ed3\u679c<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u540c\u6837\u7684\u547d\u4ee4\u67e5\u8be2\u4e00\u4e2a\u8fc7\u671fkey&#xff0c;Master\u8fd4\u56deNULL\u4f46Slave\u8fd4\u56devalue\u3002<br \/>\n\u5f71\u54cd\u56e0\u7d20&#xff1a;<\/p>\n<li>Redis\u7248\u672c\n<ul>\n<li>3.2\u4ee5\u4e0b\u7248\u672c&#xff1a;Slave\u4e0d\u4f1a\u5224\u65adkey\u662f\u5426\u8fc7\u671f&#xff0c;\u76f4\u63a5\u8fd4\u56devalue<\/li>\n<li>3.2~4.0.11\u7248\u672c&#xff1a;\u67e5\u8be2\u6570\u636e\u7684\u547d\u4ee4\u8fd4\u56deNULL&#xff0c;\u4f46EXISTS\u547d\u4ee4\u4ecd\u8fd4\u56detrue<\/li>\n<li>4.0.11\u4ee5\u4e0a\u7248\u672c&#xff1a;\u6240\u6709\u547d\u4ee4\u5747\u5df2\u4fee\u590d&#xff0c;\u8fc7\u671fkey\u8fd4\u56de\u201c\u4e0d\u5b58\u5728\u201d<\/li>\n<\/ul>\n<\/li>\n<li>\u6267\u884c\u7684\u547d\u4ee4&#xff1a;\u57283.2~4.0.11\u7248\u672c\u4e2d&#xff0c;EXISTS\u547d\u4ee4\u672a\u4fee\u590d\u8fc7\u671f\u6821\u9a8c<\/li>\n<li>\u673a\u5668\u65f6\u949f&#xff1a;Master\u548cSlave\u57fa\u4e8e\u672c\u673a\u65f6\u949f\u5224\u65ad\u8fc7\u671f&#xff0c;\u65f6\u949f\u4e0d\u4e00\u81f4\u4f1a\u5bfc\u81f4\u7ed3\u679c\u4e0d\u540c<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<ul>\n<li>\u5347\u7ea7Redis\u52304.0.11&#043;\u7248\u672c<\/li>\n<li>\u4f7f\u7528NTP\u540c\u6b65\u4e3b\u4ece\u8282\u70b9\u7684\u673a\u5668\u65f6\u949f<\/li>\n<\/ul>\n<hr \/>\n<h4>3. \u4e3b\u4ece\u5207\u6362&#xff1a;\u65f6\u949f\u4e0d\u4e00\u81f4\u5bfc\u81f4\u7684\u7f13\u5b58\u96ea\u5d29<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u4e3b\u4ece\u5207\u6362\u540e&#xff0c;\u65b0Master\u5f00\u59cb\u5927\u91cf\u6e05\u7406\u8fc7\u671fkey&#xff0c;\u5bfc\u81f4\u7f13\u5b58\u96ea\u5d29&#xff0c;\u8bf7\u6c42\u76f4\u63a5\u7a7f\u900f\u5230\u6570\u636e\u5e93\u3002<br \/>\n\u539f\u7406&#xff1a;\u5982\u679cSlave\u7684\u65f6\u949f\u6bd4Master\u5feb&#xff0c;\u5207\u6362\u4e3aMaster\u540e\u4f1a\u8ba4\u4e3a\u5927\u91cfkey\u5df2\u8fc7\u671f&#xff0c;\u4ece\u800c\u89e6\u53d1\u6279\u91cf\u6e05\u7406\u3002<br \/>\n\u5f71\u54cd\u6d41\u7a0b&#xff1a;<\/p>\n<li>Slave\u65f6\u949f\u6bd4Master\u5feb\u5f88\u591a&#xff0c;\u8ba4\u4e3a\u5927\u91cfkey\u5df2\u8fc7\u671f<\/li>\n<li>\u4e3b\u4ece\u5207\u6362\u540e&#xff0c;\u65b0Master\u5f00\u59cb\u6279\u91cf\u6e05\u7406\u8fc7\u671fkey<\/li>\n<li>\u4e3b\u7ebf\u7a0b\u963b\u585e&#xff0c;\u65e0\u6cd5\u5904\u7406\u8bf7\u6c42<\/li>\n<li>\u5927\u91cf\u7f13\u5b58\u5931\u6548&#xff0c;\u8bf7\u6c42\u7a7f\u900f\u5230\u6570\u636e\u5e93&#xff0c;\u5f15\u53d1\u7f13\u5b58\u96ea\u5d29<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<ul>\n<li>\u4fdd\u8bc1\u4e3b\u4ece\u8282\u70b9\u7684\u673a\u5668\u65f6\u949f\u4e00\u81f4<\/li>\n<li>\u4e3b\u4ece\u5207\u6362\u524d\u63d0\u524d\u9884\u70ed\u7f13\u5b58&#xff0c;\u907f\u514d\u7f13\u5b58\u96ea\u5d29<\/li>\n<li>\u5bf9\u6570\u636e\u5e93\u8bf7\u6c42\u8fdb\u884c\u9650\u6d41\u548c\u964d\u7ea7<\/li>\n<\/ul>\n<hr \/>\n<h4>4. maxmemory\u914d\u7f6e\u4e0d\u4e00\u81f4&#xff1a;\u4e3b\u4ece\u6570\u636e\u4e0d\u4e00\u81f4<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;Master\u548cSlave\u7684maxmemory\u914d\u7f6e\u4e0d\u540c&#xff0c;\u5bfc\u81f4Slave\u63d0\u524d\u6dd8\u6c70\u6570\u636e&#xff0c;\u4e3b\u4ece\u6570\u636e\u4e0d\u4e00\u81f4\u3002<br \/>\n\u539f\u7406\u56fe\u89e3&#xff1a;<\/p>\n<p>Master (maxmemory 5G) \u2192 \u6570\u636e\u91cf4G \u2192 \u6b63\u5e38<br \/>\nSlave (maxmemory 3G) \u2192 \u6570\u636e\u91cf4G \u2192 \u63d0\u524d\u6dd8\u6c701G\u6570\u636e \u2192 \u4e3b\u4ece\u6570\u636e\u4e0d\u4e00\u81f4<\/p>\n<ul>\n<li>Slave\u8d85\u8fc7maxmemory\u540e\u4f1a\u81ea\u884c\u6dd8\u6c70\u6570\u636e&#xff0c;\u800cMaster\u4ecd\u4fdd\u7559\u8fd9\u4e9b\u6570\u636e&#xff0c;\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u8c03\u6574maxmemory\u65f6\u9075\u5faa\u201c\u8c03\u5927\u5148Slave\u540eMaster&#xff0c;\u8c03\u5c0f\u5148Master\u540eSlave\u201d\u7684\u539f\u5219<\/li>\n<li>Redis 5.0&#043;\u5f00\u542freplica-ignore-maxmemory yes&#xff08;\u9ed8\u8ba4\u5f00\u542f&#xff09;&#xff0c;Slave\u4ec5\u540c\u6b65Master\u7684\u6dd8\u6c70\u7ed3\u679c<\/li>\n<\/ul>\n<hr \/>\n<h4>5. \u590d\u5236\u98ce\u66b4&#xff1a;\u5168\u91cf\u540c\u6b65\u7684\u6076\u6027\u5faa\u73af<\/h4>\n<p>\u95ee\u9898\u573a\u666f&#xff1a;\u4e3b\u4ece\u5168\u91cf\u540c\u6b65\u65f6&#xff0c;Slave\u52a0\u8f7dRDB\u8017\u65f6\u8fc7\u957f&#xff0c;\u5bfc\u81f4\u590d\u5236\u7f13\u51b2\u533a\u6ea2\u51fa&#xff0c;Master\u65ad\u5f00\u8fde\u63a5&#xff0c;Slave\u91cd\u65b0\u53d1\u8d77\u540c\u6b65&#xff0c;\u5f62\u6210\u6076\u6027\u5faa\u73af\u3002<br \/>\n\u539f\u7406\u6d41\u7a0b&#xff1a;<\/p>\n<li>Slave\u5411Master\u53d1\u8d77\u5168\u91cf\u540c\u6b65\u8bf7\u6c42<\/li>\n<li>Master\u751f\u6210RDB\u6587\u4ef6\u5e76\u53d1\u9001\u7ed9Slave<\/li>\n<li>Slave\u52a0\u8f7dRDB\u6587\u4ef6\u65f6&#xff0c;\u56e0\u6570\u636e\u91cf\u8fc7\u5927\u8017\u65f6\u8fc7\u957f<\/li>\n<li>Master\u6536\u5230\u7684\u5199\u8bf7\u6c42\u5199\u5165\u300c\u590d\u5236\u7f13\u51b2\u533a\u300d<\/li>\n<li>Slave\u65e0\u6cd5\u53ca\u65f6\u8bfb\u53d6\u7f13\u51b2\u533a&#xff0c;\u5bfc\u81f4\u7f13\u51b2\u533a\u6ea2\u51fa<\/li>\n<li>Master\u5f3a\u5236\u65ad\u5f00\u8fde\u63a5&#xff0c;\u540c\u6b65\u5931\u8d25<\/li>\n<li>Slave\u91cd\u65b0\u53d1\u8d77\u5168\u91cf\u540c\u6b65&#xff0c;\u518d\u6b21\u9677\u5165\u5faa\u73af<br \/>\n\u6838\u5fc3\u539f\u56e0&#xff1a;<\/li>\n<ul>\n<li>RDB\u6587\u4ef6\u8fc7\u5927&#xff0c;Slave\u52a0\u8f7d\u8017\u65f6\u8fc7\u957f<\/li>\n<li>\u590d\u5236\u7f13\u51b2\u533a\u914d\u7f6e\u8fc7\u5c0f&#xff0c;\u65e0\u6cd5\u5bb9\u7eb3\u540c\u6b65\u671f\u95f4\u7684\u5199\u8bf7\u6c42<\/li>\n<li>Master\u5199\u8bf7\u6c42\u91cf\u8fc7\u9ad8&#xff0c;\u5bfc\u81f4\u7f13\u51b2\u533a\u5feb\u901f\u6ea2\u51fa<br \/>\n\u89e3\u51b3\u65b9\u6848&#xff1a;<\/li>\n<li>\u62c6\u5206\u5927key&#xff0c;\u51cf\u5c0fRDB\u6587\u4ef6\u5927\u5c0f<\/li>\n<li>\u8c03\u5927slave client-output-buffer-limit\u914d\u7f6e<\/li>\n<li>\u5728\u4f4e\u5cf0\u671f\u6267\u884c\u5168\u91cf\u540c\u6b65<\/li>\n<li>\u4f7f\u7528Redis Cluster\u66ff\u4ee3\u4e3b\u4ece\u67b6\u6784<\/li>\n<\/ul>\n<hr \/>\n<h3>&#x1f6e0;\ufe0f \u751f\u4ea7\u73af\u5883\u907f\u5751\u5b9e\u8df5\u603b\u7ed3<\/h3>\n<li>\u547d\u4ee4\u5c42\u9762&#xff1a;\u907f\u514d\u4f7f\u7528\u9ad8\u98ce\u9669\u547d\u4ee4&#xff0c;\u5927key\u64cd\u4f5c\u4f18\u5148\u4f7f\u7528\u6e10\u8fdb\u5f0f\u547d\u4ee4<\/li>\n<li>\u6301\u4e45\u5316\u5c42\u9762&#xff1a;\u5408\u7406\u914d\u7f6eRDB\u548cAOF&#xff0c;\u786e\u4fdd\u6570\u636e\u5b89\u5168\u548c\u6027\u80fd\u5e73\u8861<\/li>\n<li>\u4e3b\u4ece\u5c42\u9762&#xff1a;\u4fdd\u8bc1\u4e3b\u4ece\u914d\u7f6e\u4e00\u81f4&#xff0c;\u65f6\u949f\u540c\u6b65&#xff0c;\u5f00\u542f\u534a\u540c\u6b65\u590d\u5236<\/li>\n<li>\u76d1\u63a7\u5c42\u9762&#xff1a;\u5efa\u7acb\u5b8c\u5584\u7684\u76d1\u63a7\u4f53\u7cfb&#xff0c;\u53ca\u65f6\u53d1\u73b0\u548c\u5904\u7406\u5f02\u5e38<\/li>\n<li>\u5e94\u6025\u5c42\u9762&#xff1a;\u5236\u5b9a\u5e94\u6025\u9884\u6848&#xff0c;\u5b9a\u671f\u6f14\u7ec3&#xff0c;\u786e\u4fdd\u6545\u969c\u5feb\u901f\u6062\u590d<\/li>\n<p>\u597d\u7684&#xff0c;\u6211\u628a\u8fd9\u4efdRedis\u751f\u4ea7\u73af\u5883\u907f\u5751\u6e05\u5355\u6574\u7406\u597d\u4e86&#xff0c;\u653e\u5728\u6587\u7ae0\u7684\u6700\u540e&#xff0c;\u65b9\u4fbf\u4f60\u968f\u65f6\u5bf9\u7167\u6392\u67e5\u3002<\/p>\n<hr \/>\n<h3>&#x1f4cb; \u751f\u4ea7\u73af\u5883\u907f\u5751\u6e05\u5355&#xff08;\u901f\u67e5\u7248&#xff09;<\/h3>\n<table>\n<tr>\u5206\u7c7b\u95ee\u9898\u573a\u666f\u6838\u5fc3\u539f\u56e0\u89e3\u51b3\u65b9\u6848<\/tr>\n<tbody>\n<tr>\n<td>\u547d\u4ee4\u7c7b<\/td>\n<td>SET\u547d\u4ee4\u4fee\u6539\u503c\u540e\u8fc7\u671f\u65f6\u95f4\u4e22\u5931<\/td>\n<td>SET\u547d\u4ee4\u4e0d\u643a\u5e26\u8fc7\u671f\u65f6\u95f4\u4f1a\u81ea\u52a8\u64e6\u9664\u539f\u6709\u8fc7\u671f\u65f6\u95f4<\/td>\n<td>\u6bcf\u6b21\u4fee\u6539\u90fd\u5e26\u8fc7\u671f\u65f6\u95f4&#xff1a;SET key value EX 3600<\/td>\n<\/tr>\n<tr>\n<td>\u547d\u4ee4\u7c7b<\/td>\n<td>DEL\u547d\u4ee4\u5220\u9664\u5927key\u5bfc\u81f4\u4e3b\u7ebf\u7a0b\u963b\u585e<\/td>\n<td>\u975eString\u7c7b\u578bkey\u5220\u9664\u65f6\u95f4\u590d\u6742\u5ea6O(M)&#xff0c;\u5927String\u91ca\u653e\u5185\u5b58\u8017\u65f6\u8fc7\u957f<\/td>\n<td>\u4f7f\u7528UNLINK\u66ff\u4ee3DEL&#xff0c;\u62c6\u5206\u5927key&#xff0c;\u7528SCAN\u5206\u6279\u5220\u9664<\/td>\n<\/tr>\n<tr>\n<td>\u547d\u4ee4\u7c7b<\/td>\n<td>RANDOMKEY\u5728Slave\u8282\u70b9\u6267\u884c\u5bfc\u81f4\u6b7b\u5faa\u73af<\/td>\n<td>Redis 5.0\u524dSlave\u4e0d\u4f1a\u4e3b\u52a8\u6e05\u7406\u8fc7\u671fkey&#xff0c;\u4f1a\u65e0\u9650\u5faa\u73af\u627e\u672a\u8fc7\u671fkey<\/td>\n<td>\u5347\u7ea7\u5230Redis 5.0&#043;&#xff0c;\u907f\u514d\u5728Slave\u6267\u884cRANDOMKEY&#xff0c;\u5b9a\u671f\u6e05\u7406\u8fc7\u671fkey<\/td>\n<\/tr>\n<tr>\n<td>\u547d\u4ee4\u7c7b<\/td>\n<td>SETBIT\u4f7f\u7528\u5927offset\u5bfc\u81f4OOM<\/td>\n<td>SETBIT\u4f1a\u6309offset\u5206\u914d\u5185\u5b58&#xff0c;\u6700\u5927\u652f\u6301512MB<\/td>\n<td>\u907f\u514d\u5927offset&#xff0c;\u62c6\u5206bitmap&#xff0c;\u4f7f\u7528HyperLogLog\u66ff\u4ee3<\/td>\n<\/tr>\n<tr>\n<td>\u547d\u4ee4\u7c7b<\/td>\n<td>MONITOR\u5728\u9ad8\u5e76\u53d1\u4e0b\u5bfc\u81f4OOM<\/td>\n<td>\u547d\u4ee4\u4f1a\u5199\u5165\u5ba2\u6237\u7aef\u8f93\u51fa\u7f13\u51b2\u533a&#xff0c;\u9ad8\u5e76\u53d1\u4e0b\u7f13\u51b2\u533a\u65e0\u9650\u5236\u589e\u957f<\/td>\n<td>\u7981\u6b62\u751f\u4ea7\u73af\u5883\u957f\u671f\u5f00\u542f&#xff0c;\u4f7f\u7528\u8f7b\u91cf\u7ea7\u76d1\u63a7\u5de5\u5177&#xff0c;\u914d\u7f6eclient-output-buffer-limit<\/td>\n<\/tr>\n<tr>\n<td>\u6301\u4e45\u5316\u7c7b<\/td>\n<td>Master\u5b95\u673a\u540eSlave\u6570\u636e\u4e22\u5931&#xff08;\u672a\u5f00\u542f\u6301\u4e45\u5316&#xff09;<\/td>\n<td>Master\u91cd\u542f\u540e\u4e3a\u7a7a\u5b9e\u4f8b&#xff0c;Slave\u5168\u91cf\u540c\u6b65\u7a7a\u6570\u636e<\/td>\n<td>\u5fc5\u987b\u5f00\u542fMaster\u6301\u4e45\u5316&#xff0c;\u8c03\u6574supervisor\u91cd\u542f\u5ef6\u8fdf&#xff0c;\u5f00\u542f\u534a\u540c\u6b65\u590d\u5236<\/td>\n<\/tr>\n<tr>\n<td>\u6301\u4e45\u5316\u7c7b<\/td>\n<td>AOF everysec\u7b56\u7565\u5bfc\u81f4\u4e3b\u7ebf\u7a0b\u963b\u585e<\/td>\n<td>\u78c1\u76d8IO\u8d1f\u8f7d\u8fc7\u9ad8\u65f6fsync\u963b\u585e&#xff0c;\u4e3b\u7ebf\u7a0b\u5199AOF page cache\u65f6\u4e92\u65a5\u7b49\u5f85<\/td>\n<td>\u4f7f\u7528SSD\u78c1\u76d8&#xff0c;\u76d1\u63a7IO\u8d1f\u8f7d&#xff0c;\u6838\u5fc3\u4e1a\u52a1\u7528always\u7b56\u7565<\/td>\n<\/tr>\n<tr>\n<td>\u6301\u4e45\u5316\u7c7b<\/td>\n<td>AOF everysec\u6781\u7aef\u60c5\u51b5\u4e0b\u4e22\u59312\u79d2\u6570\u636e<\/td>\n<td>\u4e3b\u7ebf\u7a0b\u4f1a\u7b49\u5f852\u79d2\u4e0d\u5199AOF page cache\u4ee5\u964d\u4f4e\u963b\u585e\u98ce\u9669<\/td>\n<td>\u9ad8\u4e00\u81f4\u6027\u573a\u666f\u7528always\u7b56\u7565&#xff0c;\u7ed3\u5408\u54e8\u5175\/\u96c6\u7fa4\u5b9e\u73b0\u9ad8\u53ef\u7528<\/td>\n<\/tr>\n<tr>\n<td>\u6301\u4e45\u5316\u7c7b<\/td>\n<td>RDB\/AOF 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