{"id":101850,"date":"2026-09-07T17:41:09","date_gmt":"2026-09-07T09:41:09","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/101850.html"},"modified":"2026-09-07T17:41:09","modified_gmt":"2026-09-07T09:41:09","slug":"%e3%80%90redis%e8%bf%9b%e9%98%b6%e7%b3%bb%e5%88%97%e3%80%91%ef%bc%9a%e4%bb%8e-rdb-%e5%88%b0-aof%ef%bc%9aredis-%e6%8c%81%e4%b9%85%e5%8c%96%e3%80%81%e5%88%b7%e7%9b%98%e4%b8%8e%e9%87%8d%e5%86%99%e6%9c%ba","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/101850.html","title":{"rendered":"\u3010Redis\u8fdb\u9636\u7cfb\u5217\u3011\uff1a\u4ece RDB \u5230 AOF\uff1aRedis \u6301\u4e45\u5316\u3001\u5237\u76d8\u4e0e\u91cd\u5199\u673a\u5236\u8be6\u89e3"},"content":{"rendered":"<p>&#x1f525; \u672c\u6587\u4e13\u680f&#xff1a;Redis &#x1f338;\u4f5c\u8005\u4e3b\u9875&#xff1a;\u52aa\u529b\u52aa\u529b\u518d\u52aa\u529bwz<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094104-6a9e86b0dac36.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094104-6a9e86b0f08eb.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094106-6a9e86b2acf2b.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>&#x1f4aa; \u4eca\u65e5\u535a\u5ba2\u52b1\u5fd7\u8bed\u5f55&#xff1a;\u4f60\u53ef\u4ee5\u6682\u65f6\u6ca1\u6709\u7ed3\u679c&#xff0c;\u4f46\u4e0d\u80fd\u957f\u671f\u6ca1\u6709\u79ef\u7d2f\u3002<\/p>\n<hr \/>\n<h3>\u601d\u7ef4\u5bfc\u56fe<\/h3>\n<p>Redis \u6301\u4e45\u5316<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 \u4e3a\u4ec0\u4e48\u9700\u8981\u6301\u4e45\u5316<br \/>\n\u2502   \u251c\u2500\u2500 Redis \u4e0d\u53ea\u662f\u7f13\u5b58<br \/>\n\u2502   \u251c\u2500\u2500 \u6570\u636e\u4e3b\u8981\u9a7b\u7559\u5185\u5b58<br \/>\n\u2502   \u2514\u2500\u2500 \u5185\u5b58\u6389\u7535\u540e\u6570\u636e\u4e22\u5931<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 RDB<br \/>\n\u2502   \u251c\u2500\u2500 SAVE<br \/>\n\u2502   \u251c\u2500\u2500 BGSAVE<br \/>\n\u2502   \u2502   \u251c\u2500\u2500 fork<br \/>\n\u2502   \u2502   \u2514\u2500\u2500 Copy On Write<br \/>\n\u2502   \u251c\u2500\u2500 \u81ea\u52a8\u89e6\u53d1 save point<br \/>\n\u2502   \u251c\u2500\u2500 \u4e34\u65f6\u6587\u4ef6 &#043; rename<br \/>\n\u2502   \u2514\u2500\u2500 \u5468\u671f\u6027\u5feb\u7167 \u2192 \u5b58\u5728\u6570\u636e\u7a97\u53e3<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 AOF<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 \u8bb0\u5f55\u5199\u64cd\u4f5c&#xff0c;\u800c\u4e0d\u662f\u53ea\u4fdd\u5b58\u6700\u7ec8\u72b6\u6001<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 RESP \u547d\u4ee4\u65e5\u5fd7<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 AOF Buffer<br \/>\n    \u2502      \u2193<br \/>\n    \u2502    write()<br \/>\n    \u2502      \u2193<br \/>\n    \u2502    Page Cache<br \/>\n    \u2502      \u2193<br \/>\n    \u2502    fsync()<br \/>\n    \u2502      \u2193<br \/>\n    \u2502    Disk \/ SSD<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 appendfsync<br \/>\n    \u2502   \u251c\u2500\u2500 always<br \/>\n    \u2502   \u251c\u2500\u2500 everysec<br \/>\n    \u2502   \u2514\u2500\u2500 no<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 AOF Rewrite<br \/>\n    \u2502   \u251c\u2500\u2500 \u4e0d\u662f\u626b\u63cf\u65e7 AOF \u53bb\u91cd<br \/>\n    \u2502   \u2514\u2500\u2500 \u6839\u636e\u5f53\u524d\u72b6\u6001\u91cd\u65b0\u751f\u6210\u6062\u590d\u57fa\u51c6<br \/>\n    \u2502<br \/>\n    \u251c\u2500\u2500 Redis &lt; 7.0<br \/>\n    \u2502   \u251c\u2500\u2500 \u5b50\u8fdb\u7a0b\u751f\u6210\u4e34\u65f6 AOF<br \/>\n    \u2502   \u251c\u2500\u2500 \u7236\u8fdb\u7a0b\u7ee7\u7eed\u5199\u65e7 AOF<br \/>\n    \u2502   \u2514\u2500\u2500 AOF Rewrite Buffer \u8865\u589e\u91cf<br \/>\n    \u2502<br \/>\n    \u2514\u2500\u2500 Redis &gt;&#061; 7.0<br \/>\n        \u251c\u2500\u2500 Base AOF<br \/>\n        \u2502   \u2514\u2500\u2500 \u53ef\u4f7f\u7528 RDB \u683c\u5f0f<br \/>\n        \u251c\u2500\u2500 Incremental AOF<br \/>\n        \u2514\u2500\u2500 Manifest<\/p>\n<hr \/>\n<h3>\u5f15\u5165&#xff1a;Redis \u4e3a\u4ec0\u4e48\u9700\u8981\u6301\u4e45\u5316<\/h3>\n<p>\u5728\u6b64\u524d\u7684\u5b66\u4e60\u4e2d&#xff0c;\u6211\u4eec\u7ecf\u5e38\u628a Redis \u653e\u5230\u8fd9\u6837\u4e00\u4e2a\u67b6\u6784\u4e2d\u7406\u89e3&#xff1a;<\/p>\n<p>Client<br \/>\n  \u2193<br \/>\n\u4e1a\u52a1\u670d\u52a1\u5668<br \/>\n  \u2193<br \/>\nRedis      \u2192 \u7f13\u5b58\u70ed\u70b9\u6570\u636e<br \/>\n  \u2193<br \/>\nMySQL      \u2192 \u4fdd\u5b58\u5168\u91cf\u6570\u636e<\/p>\n<p>\u5728\u8fd9\u79cd\u573a\u666f\u4e0b&#xff0c;\u4e00\u4e2a\u5f88\u81ea\u7136\u7684\u95ee\u9898\u5c31\u662f&#xff1a;<\/p>\n<p>\u65e2\u7136 MySQL \u5df2\u7ecf\u4fdd\u5b58\u4e86\u5b8c\u6574\u6570\u636e&#xff0c;\u90a3\u4e48 Redis \u4e2d\u7684\u6570\u636e\u5373\u4f7f\u4e22\u5931&#xff0c;\u4e5f\u53ef\u4ee5\u91cd\u65b0\u4ece MySQL \u4e2d\u52a0\u8f7d&#xff0c;\u4e3a\u4ec0\u4e48 Redis \u8fd8\u9700\u8981\u6301\u4e45\u5316&#xff1f;<\/p>\n<p>\u8fd9\u91cc\u9996\u5148\u8981\u5efa\u7acb\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u8ba4\u8bc6&#xff1a;<\/p>\n<p>Redis \u4f5c\u4e3a\u7f13\u5b58&#xff0c;\u53ea\u662f Redis \u7684\u4e00\u79cd\u5e94\u7528\u65b9\u5f0f&#xff0c;\u800c\u4e0d\u662f Redis \u552f\u4e00\u7684\u5e94\u7528\u65b9\u5f0f\u3002<\/p>\n<p>Redis \u672c\u8eab\u5c31\u662f\u4e00\u4e2a Key-Value \u6570\u636e\u5b58\u50a8\u670d\u52a1\u3002<\/p>\n<p>\u5982\u679c\u4e00\u4e2a\u4e1a\u52a1\u7684\u6570\u636e\u7ec4\u7ec7\u65b9\u5f0f\u6bd4\u8f83\u7b80\u5355&#xff0c;\u4e3b\u8981\u56f4\u7ed5&#xff1a;<\/p>\n<p>key \u2192 value<br \/>\nkey \u2192 hash<br \/>\nkey \u2192 list<br \/>\nkey \u2192 zset<\/p>\n<p>\u8fdb\u884c\u8bbf\u95ee&#xff0c;\u5e76\u4e0d\u9700\u8981 MySQL \u4e2d\u590d\u6742\u7684\u5173\u7cfb\u6a21\u578b\u3001JOIN\u3001GROUP BY\u3001\u590d\u6742 SQL \u67e5\u8be2\u4ee5\u53ca\u5927\u91cf\u5173\u7cfb\u7ea6\u675f&#xff0c;\u90a3\u4e48 Redis \u5b8c\u5168\u53ef\u80fd\u76f4\u63a5\u627f\u62c5\u67d0\u4e9b\u6838\u5fc3\u6570\u636e\u7684\u5b58\u50a8\u3002<\/p>\n<p>\u5f53\u7136&#xff0c;\u8fd9\u91cc\u4e5f\u4e0d\u80fd\u8d70\u5230\u53e6\u4e00\u4e2a\u6781\u7aef&#xff0c;\u8ba4\u4e3a\u201c\u6570\u636e\u89c4\u6a21\u5b8c\u5168\u4e0d\u91cd\u8981\u201d\u3002<\/p>\n<p>Redis \u7684\u6570\u636e\u4e3b\u8981\u9a7b\u7559\u5728\u5185\u5b58\u4e2d&#xff0c;\u56e0\u6b64&#xff1a;<\/p>\n<p>\u6570\u636e\u89c4\u6a21<br \/>\n\u5185\u5b58\u5bb9\u91cf<br \/>\n\u5185\u5b58\u6210\u672c<br \/>\n\u8bbf\u95ee\u6a21\u578b<br \/>\n\u6570\u636e\u7ed3\u6784<br \/>\n\u67e5\u8be2\u65b9\u5f0f<\/p>\n<p>\u90fd\u4f1a\u5171\u540c\u5f71\u54cd Redis \u662f\u5426\u9002\u5408\u4f5c\u4e3a\u4e3b\u8981\u5b58\u50a8\u3002<\/p>\n<p>\u4f46\u662f\u65e0\u8bba\u5982\u4f55&#xff0c;\u53ea\u8981 Redis \u4e2d\u4fdd\u5b58\u7684\u6570\u636e\u5177\u6709\u4e0d\u53ef\u968f\u610f\u4e22\u5931\u7684\u4ef7\u503c&#xff0c;\u5c31\u4f1a\u51fa\u73b0\u4e00\u4e2a\u6839\u672c\u95ee\u9898&#xff1a;<\/p>\n<p>Redis \u6570\u636e\u4e3b\u8981\u4f4d\u4e8e\u5185\u5b58<br \/>\n        \u2193<br \/>\n\u5185\u5b58\u5c5e\u4e8e\u6613\u5931\u6027\u4ecb\u8d28<br \/>\n        \u2193<br \/>\n\u673a\u5668\u65ad\u7535 \/ \u8fdb\u7a0b\u5d29\u6e83 \/ Redis \u91cd\u542f<br \/>\n        \u2193<br \/>\n\u5185\u5b58\u6570\u636e\u6d88\u5931<\/p>\n<p>\u56e0\u6b64 Redis \u9700\u8981\u628a\u5185\u5b58\u4e2d\u7684\u6570\u636e\u4fdd\u5b58\u5230&#xff1a;<\/p>\n<p>\u78c1\u76d8 \/ SSD<\/p>\n<p>\u8fd9\u79cd\u975e\u6613\u5931\u6027\u5b58\u50a8\u4ecb\u8d28\u4e2d\u3002<\/p>\n<p>\u8fd9\u5c31\u662f Redis \u6301\u4e45\u5316\u673a\u5236\u5b58\u5728\u7684\u6839\u672c\u52a8\u673a\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001RDB&#xff1a;\u7ed9 Redis \u5f53\u524d\u6570\u636e\u5e93\u72b6\u6001\u62cd\u4e00\u5f20\u5feb\u7167<\/h2>\n<p>\u5728\u8fdb\u5165 AOF \u4e4b\u524d&#xff0c;\u6211\u4eec\u5148\u628a\u6b64\u524d\u8ba4\u8bc6\u7684 RDB \u91cd\u65b0\u4e32\u8d77\u6765&#xff0c;\u56e0\u4e3a AOF \u5f88\u591a\u673a\u5236\u5b9e\u9645\u4e0a\u90fd\u662f\u5728\u89e3\u51b3 RDB \u6ca1\u6709\u89e3\u51b3\u597d\u7684\u95ee\u9898\u3002<\/p>\n<h3>1. RDB \u4fdd\u5b58\u7684\u662f\u201c\u67d0\u4e00\u65f6\u523b\u7684\u6570\u636e\u5e93\u72b6\u6001\u201d<\/h3>\n<p>\u5047\u8bbe\u67d0\u4e00\u65f6\u523b Redis \u5185\u5b58\u4e2d\u662f&#xff1a;<\/p>\n<p>name  \u2192 &#034;wangzhe&#034;<br \/>\nage   \u2192 21<br \/>\nrank  \u2192 ZSet<br \/>\nuser  \u2192 Hash<\/p>\n<p>RDB \u7684\u6838\u5fc3\u601d\u60f3\u4e0d\u662f\u8bb0\u5f55&#xff1a;<\/p>\n<p>\u4e4b\u524d\u6267\u884c\u8fc7\u54ea\u4e9b SET<br \/>\n\u4e4b\u524d\u6267\u884c\u8fc7\u54ea\u4e9b INCR<br \/>\n\u4e4b\u524d\u6267\u884c\u8fc7\u54ea\u4e9b DEL<\/p>\n<p>\u800c\u662f&#xff1a;<\/p>\n<p>\u76f4\u63a5\u628a\u5f53\u524d\u6570\u636e\u5e93\u72b6\u6001\u6309\u7167 RDB \u4e8c\u8fdb\u5236\u683c\u5f0f\u5e8f\u5217\u5316\u4e0b\u6765\u3002<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>Redis \u5f53\u524d\u5185\u5b58\u72b6\u6001<br \/>\n        \u2193<br \/>\nRDB \u5e8f\u5217\u5316<br \/>\n        \u2193<br \/>\ndump.rdb<\/p>\n<p>\u6240\u4ee5 RDB \u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u72b6\u6001\u5feb\u7167\u3002<\/p>\n<hr \/>\n<h3>2. SAVE&#xff1a;\u4e3b\u7ebf\u7a0b\u540c\u6b65\u751f\u6210 RDB<\/h3>\n<p>\u6700\u7b80\u5355\u7684 RDB \u89e6\u53d1\u65b9\u5f0f\u5c31\u662f&#xff1a;<\/p>\n<p>SAVE<\/p>\n<p>\u5176\u5fc3\u667a\u6a21\u578b\u975e\u5e38\u76f4\u63a5&#xff1a;<\/p>\n<p>Redis \u4e3b\u8fdb\u7a0b<br \/>\n    \u2193<br \/>\n\u904d\u5386\u6570\u636e\u5e93\u4e2d\u7684 KV<br \/>\n    \u2193<br \/>\n\u5e8f\u5217\u5316<br \/>\n    \u2193<br \/>\n\u5199\u5165 RDB<br \/>\n    \u2193<br \/>\n\u5b8c\u6210\u4ee5\u540e<br \/>\n    \u2193<br \/>\n\u7ee7\u7eed\u5904\u7406\u540e\u7eed\u8bf7\u6c42<\/p>\n<p>\u95ee\u9898\u4e5f\u975e\u5e38\u660e\u663e&#xff1a;<\/p>\n<p>\u6574\u4e2a SAVE \u8fc7\u7a0b\u4f1a\u963b\u585e Redis \u4e3b\u7ebf\u7a0b\u3002<\/p>\n<p>\u5982\u679c Redis \u5f53\u524d\u6570\u636e\u91cf\u6bd4\u8f83\u5927&#xff0c;\u751f\u6210 RDB \u9700\u8981\u8f83\u957f\u65f6\u95f4&#xff0c;\u90a3\u4e48\u5ba2\u6237\u7aef\u8bf7\u6c42\u5c31\u53ea\u80fd\u7b49\u5f85\u3002<\/p>\n<p>\u56e0\u6b64\u751f\u4ea7\u73af\u5883\u901a\u5e38\u4e0d\u4e3b\u52a8\u4f7f\u7528 SAVE \u5b8c\u6210\u957f\u65f6\u95f4\u7684\u5feb\u7167\u64cd\u4f5c\u3002<\/p>\n<hr \/>\n<h3>3. BGSAVE&#xff1a;fork \u5b50\u8fdb\u7a0b\u5b8c\u6210\u5feb\u7167<\/h3>\n<p>\u4e3a\u4e86\u907f\u514d Redis \u4e3b\u7ebf\u7a0b\u5728\u6574\u4e2a RDB \u751f\u6210\u671f\u95f4\u88ab\u963b\u585e&#xff0c;Redis \u63d0\u4f9b&#xff1a;<\/p>\n<p>BGSAVE<\/p>\n<p>\u6267\u884c\u4ee5\u540e&#xff1a;<\/p>\n<p>Redis \u4e3b\u8fdb\u7a0b<br \/>\n    \u2193<br \/>\nfork()<br \/>\n    \u2193<br \/>\n\u521b\u5efa\u5b50\u8fdb\u7a0b<\/p>\n<p>\u4e4b\u540e&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 \u7ee7\u7eed\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 \u5b50\u8fdb\u7a0b<br \/>\n      \u2193<br \/>\n   \u904d\u5386\u6570\u636e\u5e93<br \/>\n      \u2193<br \/>\n   \u751f\u6210 RDB<\/p>\n<p>\u8fd9\u91cc\u5c31\u4f1a\u6d89\u53ca Linux \u4e2d\u975e\u5e38\u91cd\u8981\u7684&#xff1a;<\/p>\n<p>fork &#043; Copy On Write<\/p>\n<hr \/>\n<h3>4. fork \u4e3a\u4ec0\u4e48\u4e0d\u9700\u8981\u7acb\u523b\u590d\u5236\u6574\u4efd Redis \u5185\u5b58<\/h3>\n<p>\u5047\u8bbe Redis \u5f53\u524d\u5360\u7528&#xff1a;<\/p>\n<p>10GB<\/p>\n<p>\u5185\u5b58\u3002<\/p>\n<p>\u6267\u884c fork() \u5e76\u4e0d\u610f\u5473\u7740\u7acb\u5373\u5f97\u5230&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b 10GB<br \/>\n&#043;<br \/>\n\u5b50\u8fdb\u7a0b 10GB<br \/>\n&#061;<br \/>\n20GB<\/p>\n<p>\u7236\u5b50\u8fdb\u7a0b\u4f1a\u62e5\u6709\u5404\u81ea\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4ee5\u53ca\u9875\u8868\u4f53\u7cfb&#xff0c;\u4f46\u662f\u521a\u521a\u5b8c\u6210 fork \u65f6&#xff0c;\u5927\u91cf\u9875\u8868\u9879\u4ecd\u7136\u6307\u5411\u76f8\u540c\u7684\u7269\u7406\u9875&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b\u9875\u8868 \u2500\u2500\u2500\u2510<br \/>\n              \u251c\u2500\u2500\u2192 \u540c\u4e00\u6279\u7269\u7406\u9875<br \/>\n\u5b50\u8fdb\u7a0b\u9875\u8868 \u2500\u2500\u2500\u2518<\/p>\n<p>\u53ea\u6709\u540e\u7eed\u67d0\u4e00\u65b9\u5c1d\u8bd5\u4fee\u6539\u5171\u4eab\u9875\u65f6&#xff0c;\u624d\u89e6\u53d1&#xff1a;<\/p>\n<p>Copy On Write<\/p>\n<p>\u4f8b\u5982\u7236\u8fdb\u7a0b\u7ee7\u7eed\u5904\u7406&#xff1a;<\/p>\n<p>SET name Tom<\/p>\n<p>\u5982\u679c\u4fee\u6539\u5230\u4e86\u67d0\u4e2a\u5171\u4eab\u9875&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b\u51c6\u5907\u4fee\u6539\u5171\u4eab\u9875<br \/>\n        \u2193<br \/>\n\u89e6\u53d1 COW<br \/>\n        \u2193<br \/>\n\u590d\u5236\u8be5\u7269\u7406\u9875<br \/>\n        \u2193<br \/>\n\u7236\u8fdb\u7a0b\u9875\u8868\u6307\u5411\u65b0\u9875<br \/>\n        \u2193<br \/>\n\u7236\u8fdb\u7a0b\u4fee\u6539\u65b0\u9875<\/p>\n<p>\u800c\u5b50\u8fdb\u7a0b\u4ecd\u7136\u6307\u5411\u65e7\u9875\u3002<\/p>\n<p>\u6240\u4ee5\u5bf9\u5b50\u8fdb\u7a0b\u6765\u8bf4&#xff1a;<\/p>\n<p>\u5b83\u770b\u5230\u7684\u662f fork \u90a3\u4e00\u65f6\u523b\u76f8\u5bf9\u7a33\u5b9a\u7684\u6570\u636e\u5e93\u89c6\u56fe\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 RDB \u5b50\u8fdb\u7a0b\u53ef\u4ee5\u4e00\u8fb9\u751f\u6210\u5feb\u7167&#xff0c;\u800c Redis \u7236\u8fdb\u7a0b\u4ecd\u7136\u7ee7\u7eed\u5bf9\u5916\u5904\u7406\u5199\u8bf7\u6c42\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>BGSAVE \u5e76\u4e0d\u662f\u5b8c\u5168\u6ca1\u6709\u963b\u585e\u3002<\/p>\n<p>fork() \u672c\u8eab\u9700\u8981\u521b\u5efa\u5b50\u8fdb\u7a0b\u3001\u590d\u5236\u9875\u8868\u4ee5\u53ca\u521d\u59cb\u5316\u76f8\u5173\u8fdb\u7a0b\u72b6\u6001&#xff0c;\u56e0\u6b64 Redis \u5185\u5b58\u8d8a\u5927&#xff0c;fork \u7684\u77ed\u6682\u505c\u987f\u8d8a\u53ef\u80fd\u53d8\u5f97\u660e\u663e\u3002<\/p>\n<p>\u6240\u4ee5\u66f4\u51c6\u786e\u7684\u533a\u522b\u662f&#xff1a;<\/p>\n<p>SAVE<br \/>\n\u2192 \u6574\u4e2a\u5feb\u7167\u751f\u6210\u8fc7\u7a0b\u963b\u585e<\/p>\n<p>BGSAVE<br \/>\n\u2192 fork \u9636\u6bb5\u5b58\u5728\u6210\u672c<br \/>\n\u2192 fork \u5b8c\u6210\u540e\u7531\u5b50\u8fdb\u7a0b\u751f\u6210\u5feb\u7167<br \/>\n\u2192 \u7236\u8fdb\u7a0b\u7ee7\u7eed\u5de5\u4f5c<\/p>\n<hr \/>\n<h3>5. RDB \u7684\u81ea\u52a8\u89e6\u53d1<\/h3>\n<p>\u9664\u4e86\u624b\u52a8\u6267\u884c&#xff1a;<\/p>\n<p>BGSAVE<\/p>\n<p>Redis \u8fd8\u53ef\u4ee5\u6839\u636e\u914d\u7f6e\u4e2d\u7684 save \u6761\u4ef6\u81ea\u52a8\u89e6\u53d1\u540e\u53f0\u5feb\u7167\u3002<\/p>\n<p>\u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>Redis \u5468\u671f\u6027\u68c0\u67e5<br \/>\n        \u2193<br \/>\n\u7ecf\u8fc7\u4e86\u591a\u957f\u65f6\u95f4&#xff1f;<br \/>\n        &#043;<br \/>\n\u671f\u95f4\u53d1\u751f\u4e86\u591a\u5c11\u6b21\u4fee\u6539&#xff1f;<br \/>\n        \u2193<br \/>\n\u6ee1\u8db3 save \u6761\u4ef6<br \/>\n        \u2193<br \/>\n\u89e6\u53d1\u540e\u53f0 RDB<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e00\u5b9a\u65f6\u95f4\u5185<br \/>\n&#043;<br \/>\n\u4fee\u6539\u6b21\u6570\u8fbe\u5230\u9608\u503c<\/p>\n<p>\u5373\u53ef\u89e6\u53d1\u3002<\/p>\n<p>\u8fd9\u91cc\u672c\u8d28\u4e0a\u5b58\u5728\u4e00\u4e2a\u975e\u5e38\u5178\u578b\u7684\u6743\u8861&#xff1a;<\/p>\n<p>\u5feb\u7167\u95f4\u9694\u5927<br \/>\n\u2192 \u751f\u6210 RDB \u6b21\u6570\u5c11<br \/>\n\u2192 \u6027\u80fd\u538b\u529b\u66f4\u5c0f<br \/>\n\u2192 \u6570\u636e\u4e22\u5931\u7a97\u53e3\u66f4\u5927<\/p>\n<p>\u5feb\u7167\u95f4\u9694\u5c0f<br \/>\n\u2192 \u751f\u6210 RDB \u66f4\u9891\u7e41<br \/>\n\u2192 \u6027\u80fd\u538b\u529b\u66f4\u5927<br \/>\n\u2192 \u6570\u636e\u4e22\u5931\u7a97\u53e3\u66f4\u5c0f<\/p>\n<p>\u5982\u679c\u5df2\u7ecf\u5b58\u5728\u4e00\u4e2a\u540e\u53f0\u5feb\u7167\u5b50\u8fdb\u7a0b&#xff0c;Redis \u4e0d\u4f1a\u65e0\u8111\u7ee7\u7eed fork \u591a\u4e2a RDB \u5b50\u8fdb\u7a0b\u3002<\/p>\n<p>\u539f\u56e0\u5305\u62ec&#xff1a;<\/p>\n<p>fork \u672c\u8eab\u6709\u6210\u672c<br \/>\n&#043;<br \/>\n\u591a\u4e2a\u5b50\u8fdb\u7a0b\u540c\u65f6\u626b\u63cf\u5927\u91cf\u5185\u5b58<br \/>\n&#043;<br \/>\n\u591a\u4e2a\u5b50\u8fdb\u7a0b\u540c\u65f6\u5199\u78c1\u76d8<br \/>\n&#043;<br \/>\n\u78c1\u76d8\u5e26\u5bbd\u7ade\u4e89<\/p>\n<hr \/>\n<h3>6. RDB \u4e3a\u4ec0\u4e48\u8981\u5148\u5199\u4e34\u65f6\u6587\u4ef6<\/h3>\n<p>\u751f\u6210\u65b0\u7684 RDB \u65f6&#xff0c;\u4e0d\u80fd\u7b80\u5355\u76f4\u63a5\u8986\u76d6\u65e7\u7684&#xff1a;<\/p>\n<p>dump.rdb<\/p>\n<p>\u5426\u5219\u5982\u679c\u5199\u5230\u4e00\u534a\u7a81\u7136\u5b95\u673a&#xff1a;<\/p>\n<p>\u65e7 RDB \u5df2\u7ecf\u88ab\u7834\u574f<br \/>\n&#043;<br \/>\n\u65b0 RDB \u53c8\u6ca1\u6709\u5199\u5b8c\u6574<\/p>\n<p>\u6700\u7ec8\u4e24\u8fb9\u90fd\u4e0d\u53ef\u7528\u3002<\/p>\n<p>\u6240\u4ee5 Redis \u7684\u601d\u8def\u662f&#xff1a;<\/p>\n<p>\u4fdd\u7559\u65e7 dump.rdb<br \/>\n        \u2193<br \/>\n\u5b50\u8fdb\u7a0b\u5199\u4e34\u65f6 RDB \u6587\u4ef6<br \/>\n        \u2193<br \/>\n\u5b8c\u6574\u751f\u6210\u6210\u529f<br \/>\n        \u2193<br \/>\nrename<br \/>\n        \u2193<br \/>\n\u539f\u5b50\u66ff\u6362\u65e7 dump.rdb<\/p>\n<p>\u56e0\u6b64\u6b63\u5e38\u60c5\u51b5\u4e0b&#xff0c;Redis \u4fdd\u5b58\u7684\u662f&#xff1a;<\/p>\n<p>\u6700\u8fd1\u4e00\u6b21\u6210\u529f\u751f\u6210\u7684 RDB \u5feb\u7167\u3002<\/p>\n<p>\u5982\u679c\u4eba\u4e3a\u8fdb\u884c\u5386\u53f2\u5907\u4efd&#xff0c;\u5f53\u7136\u53ef\u4ee5\u4fdd\u5b58&#xff1a;<\/p>\n<p>dump-2026-09-01.rdb<br \/>\ndump-2026-09-02.rdb<br \/>\n&#8230;<\/p>\n<p>\u4f46\u8fd9\u5c5e\u4e8e\u8fd0\u7ef4\u5907\u4efd\u7b56\u7565&#xff0c;\u4e0d\u662f Redis \u6bcf\u4e00\u6b21 BGSAVE \u9ed8\u8ba4\u81ea\u52a8\u4fdd\u7559\u591a\u4e2a\u5386\u53f2 RDB\u3002<\/p>\n<hr \/>\n<h3>7. RDB \u6062\u590d\u4ee5\u53ca\u6700\u5927\u7684\u7f3a\u70b9<\/h3>\n<p>Redis \u91cd\u542f\u4ee5\u540e&#xff0c;\u5982\u679c\u4f7f\u7528 RDB \u6062\u590d&#xff1a;<\/p>\n<p>\u8bfb\u53d6 dump.rdb<br \/>\n        \u2193<br \/>\n\u89e3\u6790 RDB \u4e8c\u8fdb\u5236\u683c\u5f0f<br \/>\n        \u2193<br \/>\n\u91cd\u65b0\u6784\u9020 Redis \u5185\u90e8\u6570\u636e\u7ed3\u6784<br \/>\n        \u2193<br \/>\n\u6062\u590d\u5185\u5b58\u6570\u636e\u5e93<\/p>\n<p>RDB \u7684\u4f18\u52bf\u975e\u5e38\u660e\u663e&#xff1a;<\/p>\n<p>\u6587\u4ef6\u7d27\u51d1<br \/>\n\u4e8c\u8fdb\u5236\u683c\u5f0f<br \/>\n\u52a0\u8f7d\u901f\u5ea6\u5feb<br \/>\n\u975e\u5e38\u9002\u5408\u505a\u5feb\u7167\u5907\u4efd<\/p>\n<p>\u4f46\u662f\u95ee\u9898\u540c\u6837\u660e\u663e\u3002<\/p>\n<p>\u5047\u8bbe&#xff1a;<\/p>\n<p>10:00 \u751f\u6210 RDB<br \/>\n10:01 SET &#8230;<br \/>\n10:02 INCR &#8230;<br \/>\n10:03 HSET &#8230;<br \/>\n10:04 DEL &#8230;<br \/>\n10:05 Redis \u5d29\u6e83<\/p>\n<p>\u800c\u4e0b\u4e00\u6b21 RDB \u8fd8\u6ca1\u6709\u751f\u6210&#xff0c;\u90a3\u4e48\u6062\u590d\u65f6\u53ea\u80fd\u6062\u590d\u5230&#xff1a;<\/p>\n<p>10:00<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>RDB \u662f\u5468\u671f\u6027\u5feb\u7167&#xff0c;\u6545\u969c\u65f6\u53ef\u80fd\u4e22\u5931\u6700\u8fd1\u4e00\u6b21\u5feb\u7167\u4e4b\u540e\u4ea7\u751f\u7684\u6570\u636e\u3002<\/p>\n<p>\u8fd9\u5c31\u662f AOF \u8981\u91cd\u70b9\u89e3\u51b3\u7684\u95ee\u9898\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001AOF&#xff1a;\u4ece\u201c\u4fdd\u5b58\u7ed3\u679c\u201d\u8fc7\u6e21\u5230\u201c\u8bb0\u5f55\u53d8\u5316\u201d<\/h2>\n<p>\u8ba4\u8bc6\u4e86 RDB \u4ee5\u540e&#xff0c;\u518d\u6765\u770b AOF \u5c31\u975e\u5e38\u81ea\u7136\u3002<\/p>\n<p>\u53ef\u4ee5\u5148\u5efa\u7acb\u4e00\u4e2a\u975e\u5e38\u6838\u5fc3\u7684\u5bf9\u6bd4&#xff1a;<\/p>\n<p>RDB<br \/>\n\u2192 \u4fdd\u5b58\u67d0\u4e2a\u65f6\u523b\u7684\u201c\u7ed3\u679c\u201d<\/p>\n<p>AOF<br \/>\n\u2192 \u8bb0\u5f55\u6570\u636e\u5e93\u53d1\u751f\u53d8\u5316\u7684\u201c\u8fc7\u7a0b\u201d<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>SET count 0<br \/>\nINCR count<br \/>\nINCR count<br \/>\nSET name wangzhe<\/p>\n<p>\u6700\u7ec8\u7ed3\u679c\u662f&#xff1a;<\/p>\n<p>count &#061; 2<br \/>\nname  &#061; wangzhe<\/p>\n<p>RDB \u66f4\u5173\u6ce8&#xff1a;<\/p>\n<p>count &#061; 2<br \/>\nname  &#061; wangzhe<\/p>\n<p>\u800c AOF \u66f4\u5173\u6ce8&#xff1a;<\/p>\n<p>SET count 0<br \/>\nINCR count<br \/>\nINCR count<br \/>\nSET name wangzhe<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff1a;<\/p>\n<p>AOF \u4f1a\u6301\u7eed\u8bb0\u5f55\u4f1a\u4fee\u6539\u6570\u636e\u5e93\u72b6\u6001\u7684\u5199\u64cd\u4f5c\u3002<\/p>\n<p>\u50cf&#xff1a;<\/p>\n<p>GET<br \/>\nHGET<br \/>\nZRANGE<\/p>\n<p>\u8fd9\u79cd\u7eaf\u8bfb\u64cd\u4f5c\u4e0d\u4f1a\u6539\u53d8\u6570\u636e\u5e93\u72b6\u6001&#xff0c;\u56e0\u6b64\u6ca1\u6709\u5fc5\u8981\u4f5c\u4e3a\u6062\u590d\u65e5\u5fd7\u5199\u5165 AOF\u3002<\/p>\n<hr \/>\n<h2>\u4e09\u3001AOF \u4e2d\u5230\u5e95\u8bb0\u5f55\u4ec0\u4e48&#xff1a;RESP \u683c\u5f0f\u7684\u5199\u547d\u4ee4<\/h2>\n<h3>1. AOF \u4e0d\u662f\u7b80\u5355\u4fdd\u5b58\u201c\u6700\u7ec8\u503c\u201d<\/h3>\n<p>\u4f8b\u5982\u6267\u884c&#xff1a;<\/p>\n<p>SET name wangzhe<\/p>\n<p>AOF \u5e76\u4e0d\u662f\u4fdd\u5b58&#xff1a;<\/p>\n<p>name &#061; wangzhe<\/p>\n<p>\u800c\u662f\u4fdd\u5b58\u4e00\u6761\u80fd\u591f\u91cd\u65b0\u6267\u884c\u7684 Redis \u547d\u4ee4\u3002<\/p>\n<p>\u6309\u7167 RESP \u8868\u793a&#xff0c;\u5927\u81f4\u5c31\u662f&#xff1a;<\/p>\n<p>*3\\\\r\\\\n<br \/>\n$3\\\\r\\\\n<br \/>\nSET\\\\r\\\\n<br \/>\n$4\\\\r\\\\n<br \/>\nname\\\\r\\\\n<br \/>\n$7\\\\r\\\\n<br \/>\nwangzhe\\\\r\\\\n<\/p>\n<p>\u4e5f\u5c31\u662f&#xff1a;<\/p>\n<p>Array<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 &#034;SET&#034;<br \/>\n\u251c\u2500\u2500 &#034;name&#034;<br \/>\n\u2514\u2500\u2500 &#034;wangzhe&#034;<\/p>\n<p>\u56e0\u6b64 AOF \u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u4e00\u4efd\u6309\u7167 Redis \u534f\u8bae\u7f16\u7801\u7684\u5199\u64cd\u4f5c\u65e5\u5fd7\u3002<\/p>\n<hr \/>\n<h3>2. AOF \u867d\u7136\u201c\u770b\u8d77\u6765\u50cf\u6587\u672c\u201d&#xff0c;\u4f46\u4e0d\u8981\u7b80\u5355\u628a\u5b83\u7406\u89e3\u6210\u666e\u901a\u6587\u672c\u6587\u4ef6<\/h3>\n<p>RESP \u5927\u91cf\u4f7f\u7528&#xff1a;<\/p>\n<p>*<br \/>\n$<br \/>\n\\\\r\\\\n<\/p>\n<p>\u4ee5\u53ca\u53ef\u8bfb\u5b57\u7b26\u4e32&#xff0c;\u56e0\u6b64\u4eba\u8089\u6253\u5f00 AOF \u65f6\u5f80\u5f80\u53ef\u4ee5\u770b\u5230&#xff1a;<\/p>\n<p>SET<br \/>\nINCR<br \/>\nHSET<br \/>\n&#8230;<\/p>\n<p>\u8fd9\u4f7f\u5b83\u770b\u8d77\u6765\u975e\u5e38\u50cf\u6587\u672c\u3002<\/p>\n<p>\u4f46\u662f RESP \u4e2d Bulk String \u662f&#xff1a;<\/p>\n<p>$&lt;length&gt;\\\\r\\\\n&lt;data&gt;\\\\r\\\\n<\/p>\n<p>\u6570\u636e\u8fb9\u754c\u4f9d\u8d56\u957f\u5ea6&#xff0c;\u800c\u4e0d\u662f\u4f9d\u8d56\u67d0\u4e00\u4e2a\u666e\u901a\u6587\u672c\u7ed3\u675f\u7b26&#xff0c;\u56e0\u6b64\u5176\u4e2d\u53ef\u4ee5\u627f\u8f7d\u4efb\u610f\u4e8c\u8fdb\u5236\u5b57\u8282\u3002<\/p>\n<p>\u6240\u4ee5\u66f4\u51c6\u786e\u7684\u8bf4\u6cd5\u662f&#xff1a;<\/p>\n<p>AOF \u4f7f\u7528 RESP \u5f62\u5f0f\u4fdd\u5b58\u547d\u4ee4&#xff0c;\u6574\u4f53\u5177\u6709\u5f88\u5f3a\u7684\u53ef\u8bfb\u6027&#xff0c;\u4f46 RESP \u672c\u8eab\u662f\u4e8c\u8fdb\u5236\u5b89\u5168\u7684\u5e8f\u5217\u5316\u534f\u8bae&#xff0c;\u5e76\u4e0d\u7b49\u4ef7\u4e8e\u666e\u901a\u6587\u672c\u534f\u8bae\u3002<\/p>\n<hr \/>\n<h3>3. AOF \u5e76\u4e0d\u662f\u7b80\u5355\u628a\u5ba2\u6237\u7aef\u539f\u59cb\u7f51\u7edc\u8bf7\u6c42\u590d\u5236\u4e00\u4efd<\/h3>\n<p>\u5ba2\u6237\u7aef\u6267\u884c&#xff1a;<\/p>\n<p>SET name wangzhe<\/p>\n<p>\u7f51\u7edc\u94fe\u8def\u5927\u81f4\u662f&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aef Redis Command<br \/>\n        \u2193<br \/>\nRESP \u7f16\u7801<br \/>\n        \u2193<br \/>\nTCP \u5b57\u8282\u6d41<br \/>\n        \u2193<br \/>\nRedis Server<br \/>\n        \u2193<br \/>\nRESP \u89e3\u6790<br \/>\n        \u2193<br \/>\n\u5f97\u5230 argv<\/p>\n<p>Redis Server \u5185\u90e8\u6700\u7ec8\u66f4\u63a5\u8fd1\u5f97\u5230&#xff1a;<\/p>\n<p>argv[0] &#061; &#034;SET&#034;<br \/>\nargv[1] &#061; &#034;name&#034;<br \/>\nargv[2] &#061; &#034;wangzhe&#034;<\/p>\n<p>\u7136\u540e\u6267\u884c\u547d\u4ee4\u3002<\/p>\n<p>\u5982\u679c\u8fd9\u6761\u547d\u4ee4\u9700\u8981\u8fdb\u5165 AOF&#xff0c;\u5219 Redis \u6839\u636e\u9700\u8981\u91cd\u65b0\u7ec4\u7ec7\/\u7f16\u7801\u76f8\u5e94\u7684\u547d\u4ee4\u5185\u5bb9&#xff0c;\u518d\u8ffd\u52a0\u8fdb\u5165 AOF \u8bb0\u5f55\u6d41\u7a0b\u3002<\/p>\n<p>\u56e0\u6b64\u4e0d\u8981\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u6536\u5230\u7f51\u7edc\u8bf7\u6c42<br \/>\n\u2193<br \/>\n\u4fdd\u7559\u539f\u59cb\u7f51\u7edc\u5b57\u8282\u526f\u672c<br \/>\n\u2193<br \/>\n\u76f4\u63a5\u5199\u8fdb AOF<\/p>\n<p>\u66f4\u52a0\u5408\u9002\u7684\u5fc3\u667a\u6a21\u578b\u662f&#xff1a;<\/p>\n<p>\u5ba2\u6237\u7aef\u8bf7\u6c42<br \/>\n\u2193<br \/>\nRESP \u89e3\u6790<br \/>\n\u2193<br \/>\n\u5f97\u5230\u547d\u4ee4\u548c\u53c2\u6570<br \/>\n\u2193<br \/>\n\u6267\u884c\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u751f\u6210\u9700\u8981\u8bb0\u5f55\u7684 AOF \u547d\u4ee4\u8868\u793a<br \/>\n\u2193<br \/>\n\u8ffd\u52a0 AOF<\/p>\n<hr \/>\n<h2>\u56db\u3001AOF \u6062\u590d&#xff1a;\u89e3\u6790\u65e5\u5fd7\u5e76\u91cd\u653e\u547d\u4ee4<\/h2>\n<p>\u65e2\u7136 AOF \u4fdd\u5b58\u7684\u662f\u4e00\u6761\u6761\u5199\u547d\u4ee4&#xff0c;\u90a3\u4e48\u6062\u590d\u8fc7\u7a0b\u5c31\u5f88\u5bb9\u6613\u7406\u89e3\u4e86&#xff1a;<\/p>\n<p>AOF \u6587\u4ef6<br \/>\n    \u2193<br \/>\n\u8bfb\u53d6 RESP \u6570\u636e<br \/>\n    \u2193<br \/>\n\u89e3\u6790 \/ \u53cd\u5e8f\u5217\u5316<br \/>\n    \u2193<br \/>\n\u5f97\u5230 Redis \u547d\u4ee4<br \/>\n    \u2193<br \/>\n\u6309\u7167\u987a\u5e8f\u91cd\u65b0\u6267\u884c<br \/>\n    \u2193<br \/>\n\u91cd\u65b0\u6784\u9020\u5185\u5b58\u6570\u636e\u5e93<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>SET a 1<br \/>\nINCR a<br \/>\nHSET user name Tom<\/p>\n<p>Redis \u91cd\u542f\u4ee5\u540e\u91cd\u65b0\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c&#xff0c;\u6700\u7ec8\u81ea\u7136\u5f97\u5230\u5bf9\u5e94\u7684\u6570\u636e\u72b6\u6001\u3002<\/p>\n<p>\u56e0\u6b64 AOF \u7684\u6062\u590d\u601d\u8def\u5f88\u50cf\u6570\u636e\u5e93\u4e2d\u7684&#xff1a;<\/p>\n<p>\u903b\u8f91\u5907\u4efd \/ \u65e5\u5fd7\u91cd\u653e<\/p>\n<p>\u4f8b\u5982 MySQL \u7684\u903b\u8f91\u5907\u4efd\u53ef\u80fd\u4fdd\u5b58&#xff1a;<\/p>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><br \/>\n<span class=\"token keyword\">INSERT<\/span> <span class=\"token keyword\">INTO<\/span> <span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><\/p>\n<p>\u6062\u590d\u65f6\u91cd\u65b0\u6267\u884c\u8fd9\u4e9b SQL\u3002<\/p>\n<p>RDB \u4e0e AOF \u7684\u5dee\u522b\u53ef\u4ee5\u7ee7\u7eed\u538b\u7f29\u6210&#xff1a;<\/p>\n<p>RDB<br \/>\n\u2192 \u4fdd\u5b58\u7ed3\u679c<br \/>\n\u2192 \u76f4\u63a5\u4ece\u72b6\u6001\u6062\u590d<\/p>\n<p>AOF<br \/>\n\u2192 \u4fdd\u5b58\u8fc7\u7a0b<br \/>\n\u2192 \u901a\u8fc7\u91cd\u653e\u64cd\u4f5c\u6062\u590d<\/p>\n<hr \/>\n<h2>\u4e94\u3001AOF \u7684\u6838\u5fc3\u5199\u5165\u94fe\u8def&#xff1a;AOF Buffer \u2192 write \u2192 Page Cache \u2192 fsync<\/h2>\n<p>\u8fd9\u91cc\u662f AOF \u6700\u5bb9\u6613\u6df7\u6dc6\u3001\u4e5f\u662f\u6700\u91cd\u8981\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<p>\u5f88\u591a\u4eba\u770b\u5230&#xff1a;<\/p>\n<p>AOF \u6bd4 RDB \u5b9e\u65f6\u6027\u66f4\u5f3a\u3002<\/p>\n<p>\u5c31\u5bb9\u6613\u8bef\u4ee5\u4e3a&#xff1a;<\/p>\n<p>\u6bcf\u6267\u884c\u4e00\u6761\u5199\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u7acb\u523b\u53d1\u751f\u4e00\u6b21\u78c1\u76d8 IO<br \/>\n\u2193<br \/>\n\u5199\u5b8c\u4ee5\u540e\u518d\u6267\u884c\u4e0b\u4e00\u6761<\/p>\n<p>\u8fd9\u663e\u7136\u4e0d\u5408\u7406\u3002<\/p>\n<p>Redis \u672c\u8eab\u5927\u91cf\u6570\u636e\u64cd\u4f5c\u90fd\u5728\u5185\u5b58\u4e2d\u5b8c\u6210&#xff0c;\u5982\u679c\u6bcf\u6761\u547d\u4ee4\u90fd\u5fc5\u987b\u540c\u6b65\u7b49\u5f85\u78c1\u76d8&#xff0c;\u90a3\u4e48 Redis \u7684\u6027\u80fd\u4f1a\u76f4\u63a5\u88ab\u78c1\u76d8\u62d6\u4f4f\u3002<\/p>\n<p>\u771f\u6b63\u7684\u94fe\u8def\u5e94\u8be5\u5206\u6210\u591a\u5c42&#xff1a;<\/p>\n<p>Redis \u5199\u547d\u4ee4<br \/>\n      \u2193<br \/>\nAOF Buffer<br \/>\n      \u2193<br \/>\nwrite()<br \/>\n      \u2193<br \/>\n\u5185\u6838 Page Cache<br \/>\n      \u2193<br \/>\nfsync()<br \/>\n      \u2193<br \/>\nDisk \/ SSD<\/p>\n<hr \/>\n<h3>1. \u7b2c\u4e00\u5c42&#xff1a;AOF Buffer<\/h3>\n<p>Redis \u4f1a\u5148\u5728\u7528\u6237\u6001\u7ef4\u62a4&#xff1a;<\/p>\n<p>AOF Buffer<\/p>\n<p>\u65b0\u4ea7\u751f\u7684 AOF \u65e5\u5fd7\u9996\u5148\u8ffd\u52a0\u5230\u8fd9\u5757\u7528\u6237\u6001\u7f13\u51b2\u533a\u57df\u3002<\/p>\n<p>\u4f8b\u5982\u8fde\u7eed\u6267\u884c&#xff1a;<\/p>\n<p>SET a 1<br \/>\nINCR count<br \/>\nHSET user name Tom<br \/>\nLPUSH list hello<\/p>\n<p>\u53ef\u4ee5\u5148\u5f62\u6210&#xff1a;<\/p>\n<p>AOF Buffer&#xff1a;<\/p>\n<p>SET &#8230;<br \/>\nINCR &#8230;<br \/>\nHSET &#8230;<br \/>\nLPUSH &#8230;<\/p>\n<p>\u8fd9\u91cc\u7684\u610f\u4e49\u5c31\u662f&#xff1a;<\/p>\n<p>\u903b\u8f91\u4e0a\u6bcf\u4e2a\u5199\u64cd\u4f5c\u90fd\u9700\u8981\u88ab\u8bb0\u5f55&#xff0c;\u4f46\u5e76\u4e0d\u610f\u5473\u7740\u6bcf\u4e2a\u5199\u64cd\u4f5c\u90fd\u5fc5\u987b\u5355\u72ec\u8c03\u7528\u4e00\u6b21 write\u3002<\/p>\n<hr \/>\n<h3>2. \u7b2c\u4e8c\u5c42&#xff1a;write()<\/h3>\n<p>\u5f53 Redis \u5728\u5408\u9002\u7684\u65f6\u673a\u5904\u7406 AOF Buffer \u65f6&#xff0c;\u4f1a\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u628a\u4e00\u6279 AOF \u6570\u636e\u5199\u5165\u6587\u4ef6\u3002<\/p>\n<p>\u4f46\u662f Linux \u4e2d\u666e\u901a\u6587\u4ef6\u7684 write() \u901a\u5e38\u5e76\u4e0d\u610f\u5473\u7740&#xff1a;<\/p>\n<p>\u6570\u636e\u5df2\u7ecf\u771f\u6b63\u5199\u8fdb\u7269\u7406\u78c1\u76d8<\/p>\n<p>\u66f4\u52a0\u5e38\u89c1\u7684\u8def\u5f84\u662f&#xff1a;<\/p>\n<p>Redis \u7528\u6237\u6001 Buffer<br \/>\n        \u2193<br \/>\nwrite()<br \/>\n        \u2193<br \/>\n\u5185\u6838 Page Cache<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>write \u66f4\u63a5\u8fd1\u201c\u6211\u628a\u6570\u636e\u4ea4\u7ed9\u5185\u6838\u4e86\u201d\u3002<\/p>\n<hr \/>\n<h3>3. write \u672c\u8eab\u4e5f\u4e0d\u662f\u6ca1\u6709\u6210\u672c<\/h3>\n<p>write() \u662f\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528&#xff0c;\u4f1a\u6d89\u53ca&#xff1a;<\/p>\n<p>\u7528\u6237\u6001<br \/>\n  \u2193<br \/>\n\u7cfb\u7edf\u8c03\u7528<br \/>\n  \u2193<br \/>\n\u5185\u6838\u6001<br \/>\n  \u2193<br \/>\n\u6587\u4ef6\u7cfb\u7edf \/ Page Cache<br \/>\n  \u2193<br \/>\n\u8fd4\u56de\u7528\u6237\u6001<\/p>\n<p>\u56e0\u6b64\u5982\u679c&#xff1a;<\/p>\n<p>\u4e00\u6761\u547d\u4ee4 \u2192 \u4e00\u6b21 write<\/p>\n<p>\u5927\u91cf\u7cfb\u7edf\u8c03\u7528\u672c\u8eab\u4e5f\u4f1a\u9020\u6210\u989d\u5916\u5f00\u9500\u3002<\/p>\n<p>\u6240\u4ee5 Redis \u4f1a\u901a\u8fc7\u7f13\u51b2\u548c\u6279\u5904\u7406&#xff0c;\u4f7f\u5f97&#xff1a;<\/p>\n<p>\u547d\u4ee41 \u2510<br \/>\n\u547d\u4ee42 \u2502<br \/>\n\u547d\u4ee43 \u251c\u2500\u2500\u2192 AOF Buffer \u2500\u2500\u2192 \u4e00\u6b21\/\u5c11\u91cf write()<br \/>\n\u547d\u4ee44 \u2502<br \/>\n\u547d\u4ee45 \u2518<\/p>\n<p>\u4ece\u800c\u644a\u8584 syscall \u5f00\u9500\u3002<\/p>\n<p>\u56e0\u6b64\u9700\u8981\u5efa\u7acb\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u8ba4\u8bc6&#xff1a;<\/p>\n<p>\u547d\u4ee4\u8bb0\u5f55\u7c92\u5ea6<br \/>\n\u2260<br \/>\nwrite \u7cfb\u7edf\u8c03\u7528\u7c92\u5ea6<\/p>\n<p>AOF \u53ef\u4ee5\u505a\u5230&#xff1a;<\/p>\n<p>\u6bcf\u6761\u5199\u547d\u4ee4\u90fd\u903b\u8f91\u8bb0\u5f55<\/p>\n<p>\u540c\u65f6\u53c8\u505a\u5230&#xff1a;<\/p>\n<p>\u591a\u6761\u8bb0\u5f55\u6279\u91cf write<\/p>\n<p>\u8fd9\u4e24\u4ef6\u4e8b\u60c5\u5b8c\u5168\u4e0d\u51b2\u7a81\u3002<\/p>\n<hr \/>\n<h3>4. \u7b2c\u4e09\u5c42&#xff1a;Page Cache<\/h3>\n<p>write() \u5b8c\u6210\u540e&#xff0c;\u6570\u636e\u901a\u5e38\u5df2\u7ecf\u8fdb\u5165&#xff1a;<\/p>\n<p>Linux Page Cache<\/p>\n<p>\u4f46\u662f Page Cache \u672c\u8d28\u4e0a\u4ecd\u7136\u662f\u5185\u5b58\u3002<\/p>\n<p>\u5982\u679c\u6b64\u65f6&#xff1a;<\/p>\n<p>\u673a\u5668\u7a81\u7136\u6389\u7535<\/p>\n<p>\u90a3\u4e48\u5c1a\u672a\u771f\u6b63\u6301\u4e45\u5316\u7684\u6570\u636e\u4ecd\u7136\u53ef\u80fd\u4e22\u5931\u3002<\/p>\n<p>Linux \u81ea\u5df1\u5b58\u5728\u810f\u9875\u56de\u5199\u673a\u5236&#xff1a;<\/p>\n<p>Page Cache \u4e2d\u7684\u6587\u4ef6\u9875\u88ab\u4fee\u6539<br \/>\n        \u2193<br \/>\n\u6210\u4e3a Dirty Page<br \/>\n        \u2193<br \/>\n\u5185\u6838\u6839\u636e\u81ea\u8eab\u7b56\u7565<br \/>\n        \u2193<br \/>\n\u5728\u5408\u9002\u65f6\u673a\u56de\u5199\u78c1\u76d8<\/p>\n<p>\u6240\u4ee5\u5373\u4f7f\u5e94\u7528\u7a0b\u5e8f\u4e0d\u4e3b\u52a8\u505a\u4efb\u4f55\u4e8b\u60c5&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u6700\u7ec8\u4e5f\u4f1a\u5c1d\u8bd5\u628a\u810f\u9875\u5199\u56de\u78c1\u76d8\u3002<\/p>\n<p>\u4f46\u662f\u95ee\u9898\u5728\u4e8e&#xff1a;<\/p>\n<p>\u64cd\u4f5c\u7cfb\u7edf\u7684\u76ee\u6807\u5e76\u4e0d\u662f\u5411 Redis \u4fdd\u8bc1\u201c\u6700\u591a\u53ea\u4e22 1 \u79d2\u7684\u6570\u636e\u201d\u3002<\/p>\n<p>Linux \u8981\u7efc\u5408\u8003\u8651&#xff1a;<\/p>\n<p>\u5185\u5b58\u538b\u529b<br \/>\n\u810f\u9875\u6bd4\u4f8b<br \/>\nIO \u8c03\u5ea6<br \/>\n\u78c1\u76d8\u541e\u5410<br \/>\n\u7cfb\u7edf\u6574\u4f53\u8d1f\u8f7d<\/p>\n<p>\u56e0\u6b64\u5982\u679c Redis \u5b8c\u5168\u4f9d\u8d56\u5185\u6838\u81ea\u884c\u56de\u5199&#xff0c;\u5c31\u65e0\u6cd5\u7cbe\u786e\u63a7\u5236\u6301\u4e45\u5316\u7684\u6570\u636e\u7a97\u53e3\u3002<\/p>\n<hr \/>\n<h2>\u516d\u3001fsync&#xff1a;\u4ece\u201c\u5199\u8fdb\u5185\u6838\u201d\u5230\u201c\u8981\u6c42\u771f\u6b63\u6301\u4e45\u5316\u201d<\/h2>\n<h3>1. fsync \u5230\u5e95\u662f\u4ec0\u4e48<\/h3>\n<p>fsync() \u662f\u4e00\u4e2a\u540c\u6b65\u7cfb\u7edf\u8c03\u7528\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p><span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">,<\/span> buf<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">fsync<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u53ef\u4ee5\u5148\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>write()<br \/>\n\u2193<br \/>\n\u6570\u636e\u8fdb\u5165 Page Cache<\/p>\n<p>fsync()<br \/>\n\u2193<br \/>\n\u8981\u6c42\u5185\u6838\u540c\u6b65\u8be5\u6587\u4ef6\u76f8\u5173\u810f\u6570\u636e<br \/>\n\u2193<br \/>\n\u7b49\u5f85\u6301\u4e45\u5316\u5b8c\u6210<br \/>\n\u2193<br \/>\nfsync \u8fd4\u56de<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>fsync \u4e0d\u662f\u201c\u914d\u7f6e\u5237\u76d8\u9891\u7387\u201d\u7684\u63a5\u53e3&#xff0c;\u800c\u662f\u4e00\u6b21\u201c\u73b0\u5728\u628a\u8fd9\u4e2a\u6587\u4ef6\u540c\u6b65\u4e0b\u53bb\u201d\u7684\u8bf7\u6c42\u3002<\/p>\n<p>\u771f\u6b63\u7684\u201c\u5237\u76d8\u9891\u7387\u201d\u6765\u81ea&#xff1a;<\/p>\n<p>\u5e94\u7528\u7a0b\u5e8f\u591a\u4e45\u8c03\u7528\u4e00\u6b21 fsync()<\/p>\n<hr \/>\n<h3>2. fsync \u4e3a\u4ec0\u4e48\u6602\u8d35<\/h3>\n<p>fsync() \u662f\u540c\u6b65\u8c03\u7528\u3002<\/p>\n<p>\u8c03\u7528\u7ebf\u7a0b\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token function\">fsync<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u4e4b\u540e&#xff1a;<\/p>\n<p>\u8fdb\u5165\u5185\u6838<br \/>\n\u2193<br \/>\n\u7b49\u5f85\u76f8\u5173\u6570\u636e\u5b8c\u6210\u6301\u4e45\u5316<br \/>\n\u2193<br \/>\nfsync \u8fd4\u56de<br \/>\n\u2193<br \/>\n\u7ebf\u7a0b\u7ee7\u7eed\u6267\u884c<\/p>\n<p>\u56e0\u6b64\u5982\u679c\u4e3b\u7ebf\u7a0b\u76f4\u63a5\u9891\u7e41\u8c03\u7528 fsync&#xff1a;<\/p>\n<p>Redis \u4e3b\u7ebf\u7a0b<br \/>\n\u2193<br \/>\nfsync<br \/>\n\u2193<br \/>\n\u7b49\u5f85\u78c1\u76d8<br \/>\n\u2193<br \/>\n\u624d\u80fd\u7ee7\u7eed<\/p>\n<p>\u90a3\u4e48\u78c1\u76d8\u5ef6\u8fdf\u5c31\u4f1a\u76f4\u63a5\u8fdb\u5165 Redis \u8bf7\u6c42\u8def\u5f84\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 AOF \u7684\u6027\u80fd\u6743\u8861\u6700\u7ec8\u96c6\u4e2d\u5230\u4e86&#xff1a;<\/p>\n<p>\u591a\u4e45 fsync \u4e00\u6b21\u3002<\/p>\n<hr \/>\n<h3>3. AOF \u6700\u91cd\u8981\u7684\u4e09\u5c42\u7c92\u5ea6<\/h3>\n<p>\u5230\u8fd9\u91cc\u53ef\u4ee5\u5efa\u7acb\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u5206\u5c42&#xff1a;<\/p>\n<p>\u7b2c\u4e00\u5c42&#xff1a;\u547d\u4ee4\u8bb0\u5f55\u7c92\u5ea6<br \/>\n\u2192 \u54ea\u4e9b\u5199\u547d\u4ee4\u9700\u8981\u8fdb\u5165 AOF<\/p>\n<p>\u7b2c\u4e8c\u5c42&#xff1a;write \u7c92\u5ea6<br \/>\n\u2192 AOF Buffer \u4e2d\u591a\u5c11\u6570\u636e\u4e00\u8d77\u4ea4\u7ed9\u5185\u6838<\/p>\n<p>\u7b2c\u4e09\u5c42&#xff1a;fsync \u7c92\u5ea6<br \/>\n\u2192 Page Cache \u4e2d\u7684\u6570\u636e\u591a\u4e45\u8981\u6c42\u771f\u6b63\u6301\u4e45\u5316\u4e00\u6b21<\/p>\n<p>\u4e5f\u5c31\u662f&#xff1a;<\/p>\n<p>\u8bb0\u5f55\u7c92\u5ea6<br \/>\n\u2260<br \/>\nwrite \u7c92\u5ea6<br \/>\n\u2260<br \/>\nfsync \u7c92\u5ea6<\/p>\n<p>\u5176\u4e2d&#xff1a;<\/p>\n<p>write \u6279\u5904\u7406<br \/>\n\u2192 \u4e3b\u8981\u5f71\u54cd\u7cfb\u7edf\u8c03\u7528\u5f00\u9500<\/p>\n<p>fsync \u9891\u7387<br \/>\n\u2192 \u76f4\u63a5\u5f71\u54cd\u6027\u80fd\u4e0e\u6570\u636e\u5b89\u5168\u6027\u4e4b\u95f4\u7684\u6743\u8861<\/p>\n<hr \/>\n<h2>\u4e03\u3001appendfsync&#xff1a;\u4e09\u79cd AOF \u5237\u76d8\u7b56\u7565<\/h2>\n<p>Redis \u914d\u7f6e\u6587\u4ef6\u4e2d\u6700\u6838\u5fc3\u7684\u4e09\u4e2a\u9009\u9879\u5c31\u662f&#xff1a;<\/p>\n<p>appendfsync always<br \/>\nappendfsync everysec<br \/>\nappendfsync no<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094106-6a9e86b2b979c.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h3>1. appendfsync always<\/h3>\n<p>always \u53ef\u4ee5\u5148\u7406\u89e3\u4e3a&#xff1a;<\/p>\n<p>AOF \u6570\u636e write \u5230 Page Cache \u540e&#xff0c;\u7acb\u5373\u8981\u6c42\u540c\u6b65 fsync&#xff0c;\u5e76\u4e14\u8bf7\u6c42\u5b8c\u6210\u8def\u5f84\u9700\u8981\u7b49\u5f85\u5237\u76d8\u6210\u529f\u3002<\/p>\n<p>\u57fa\u672c\u94fe\u8def&#xff1a;<\/p>\n<p>\u6267\u884c\u4e00\u6279\u5199\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u8ffd\u52a0 AOF Buffer<br \/>\n\u2193<br \/>\nwrite()<br \/>\n\u2193<br \/>\nPage Cache<br \/>\n\u2193<br \/>\nfsync()<br \/>\n\u2193<br \/>\n\u7b49\u5f85\u78c1\u76d8\u5b8c\u6210<br \/>\n\u2193<br \/>\n\u7ee7\u7eed<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>\u53ef\u9760\u6027\u6700\u9ad8<br \/>\n\u6027\u80fd\u6700\u4f4e<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff0c;\u4e0d\u8981\u673a\u68b0\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u6bcf\u4e00\u6761 Redis \u547d\u4ee4\u90fd\u72ec\u7acb\u4e00\u6b21 write &#043; fsync<\/p>\n<p>Redis \u53ef\u4ee5\u5bf9\u540c\u4e00\u8f6e\u5904\u7406\u4e2d\u7684\u591a\u6761\u5199\u547d\u4ee4\u8fdb\u884c\u6279\u91cf\u63d0\u4ea4&#xff0c;\u6240\u4ee5\u66f4\u9002\u5408\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u6bcf\u6279 AOF \u5199\u5165\u540e\u540c\u6b65\u7b49\u5f85\u6301\u4e45\u5316\u5b8c\u6210\u3002<\/p>\n<hr \/>\n<h3>2. appendfsync everysec<\/h3>\n<p>\u8fd9\u662f\u6700\u503c\u5f97\u7406\u89e3\u7684\u6a21\u5f0f\u3002<\/p>\n<p>\u53ef\u4ee5\u5148\u5efa\u7acb\u4e24\u4e2a\u89d2\u8272&#xff1a;<\/p>\n<p>Redis \u4e3b\u7ebf\u7a0b<br \/>\n&#043;<br \/>\nAOF fsync \u540e\u53f0\u7ebf\u7a0b<\/p>\n<p>\u4e3b\u7ebf\u7a0b\u8d1f\u8d23&#xff1a;<\/p>\n<p>\u6267\u884c\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u8ffd\u52a0 AOF Buffer<br \/>\n\u2193<br \/>\n\u6279\u91cf write \u5230 Page Cache<br \/>\n\u2193<br \/>\n\u7ee7\u7eed\u5904\u7406\u8bf7\u6c42<\/p>\n<p>\u540e\u53f0\u7ebf\u7a0b\u8d1f\u8d23&#xff1a;<\/p>\n<p>\u5927\u7ea6\u6bcf\u79d2\u5b89\u6392\u4e00\u6b21 fsync<br \/>\n\u2193<br \/>\n\u540e\u53f0\u7ebf\u7a0b\u8c03\u7528 fsync<br \/>\n\u2193<br \/>\n\u540e\u53f0\u7ebf\u7a0b\u81ea\u5df1\u963b\u585e\u7b49\u5f85<\/p>\n<p>\u8fd9\u6837&#xff1a;<\/p>\n<p>fsync() \u4f9d\u7136\u662f\u540c\u6b65\u963b\u585e\u63a5\u53e3&#xff0c;\u4f46\u662f\u88ab\u963b\u585e\u7684\u4e3b\u8981\u662f\u540e\u53f0\u7ebf\u7a0b&#xff0c;\u800c\u4e0d\u662f\u4e3b\u4e8b\u4ef6\u5faa\u73af\u7ebf\u7a0b\u3002<\/p>\n<p>\u56e0\u6b64\u76f8\u6bd4 always&#xff1a;<\/p>\n<p>\u6027\u80fd\u660e\u663e\u66f4\u597d<br \/>\n&#043;<br \/>\n\u901a\u5e38\u53ea\u627f\u62c5\u7ea6 1 \u79d2\u91cf\u7ea7\u7684\u6570\u636e\u4e22\u5931\u7a97\u53e3<\/p>\n<hr \/>\n<h3>3. \u201ceverysec \u6bcf\u79d2\u4e00\u6b21\u201d\u5230\u5e95\u662f\u4ec0\u4e48\u610f\u601d<\/h3>\n<p>\u8fd9\u91cc\u5f88\u5bb9\u6613\u4ea7\u751f\u4e00\u4e2a\u8bef\u533a&#xff1a;<\/p>\n<p>\u540e\u53f0\u7ebf\u7a0b\u6bcf sleep(1)<br \/>\n\u2193<br \/>\n\u65e0\u6761\u4ef6\u518d\u542f\u52a8\u4e00\u4e2a fsync<\/p>\n<p>\u4e0d\u662f\u8fd9\u6837\u3002<\/p>\n<p>\u66f4\u52a0\u51c6\u786e\u7684\u7406\u89e3\u662f&#xff1a;<\/p>\n<p>Redis \u4ee5\u201c\u5927\u7ea6\u6bcf\u79d2\u4e00\u6b21\u201d\u4e3a\u76ee\u6807\u8282\u594f\u5b89\u6392\u540e\u53f0 fsync\u3002<\/p>\n<p>\u5047\u8bbe&#xff1a;<\/p>\n<p>t &#061; 0<br \/>\n\u540e\u53f0\u7ebf\u7a0b\u5f00\u59cb fsync<\/p>\n<p>\u5982\u679c&#xff1a;<\/p>\n<p>0.1s<br \/>\nfsync \u8fd4\u56de<\/p>\n<p>\u90a3\u4e48\u540e\u7eed\u5927\u7ea6\u5230\u4e0b\u4e00\u79d2\u9644\u8fd1&#xff0c;\u518d\u6839\u636e\u72b6\u6001\u5b89\u6392\u65b0\u7684 fsync\u3002<\/p>\n<p>\u4f46\u662f\u5982\u679c\u78c1\u76d8\u975e\u5e38\u6162&#xff1a;<\/p>\n<p>t &#061; 0<br \/>\nfsync \u5f00\u59cb<\/p>\n<p>t &#061; 1s<br \/>\n\u4ecd\u7136\u6ca1\u6709\u8fd4\u56de<\/p>\n<p>t &#061; 2s<br \/>\n\u4ecd\u7136\u6ca1\u6709\u8fd4\u56de<\/p>\n<p>t &#061; 2.5s<br \/>\nfsync \u624d\u8fd4\u56de<\/p>\n<p>\u8fd9\u671f\u95f4\u4e0d\u4f1a\u51fa\u73b0&#xff1a;<\/p>\n<p>1s \u518d\u542f\u52a8\u4e00\u4e2a fsync<br \/>\n2s \u518d\u542f\u52a8\u4e00\u4e2a fsync<\/p>\n<p>\u56e0\u4e3a\u8d1f\u8d23 fsync \u7684\u540e\u53f0\u7ebf\u7a0b\u672c\u8eab\u8fd8\u963b\u585e\u5728\u4e0a\u4e00\u6b21\u7cfb\u7edf\u8c03\u7528\u4e2d\u3002<\/p>\n<p>\u5f53\u5b83\u6062\u590d\u4ee5\u540e&#xff0c;Redis \u518d\u6839\u636e&#xff1a;<\/p>\n<p>\u5f53\u524d\u65f6\u95f4<br \/>\n\u4e0a\u4e00\u6b21\u5237\u76d8\u72b6\u6001<br \/>\n\u662f\u5426\u5b58\u5728\u65b0\u7684 AOF \u6570\u636e<br \/>\n\u540e\u53f0 fsync \u662f\u5426\u53ef\u7528<\/p>\n<p>\u7b49\u6761\u4ef6\u51b3\u5b9a\u540e\u7eed\u5237\u76d8\u3002<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>everysec<br \/>\n\u2260<br \/>\n\u786c\u5b9e\u65f6\u4fdd\u8bc1\u201c\u6bcf\u79d2\u4e00\u5b9a\u5b8c\u6210\u4e00\u6b21 fsync\u201d<\/p>\n<p>everysec<br \/>\n&#061;<br \/>\n\u5c3d\u91cf\u4ee5\u4e00\u79d2\u5de6\u53f3\u7684\u7c92\u5ea6\u5b8c\u6210\u540e\u53f0\u5237\u76d8<\/p>\n<hr \/>\n<h3>4. Redis \u600e\u4e48\u77e5\u9053\u6709\u6ca1\u6709\u65b0\u7684 AOF \u6570\u636e\u9700\u8981\u5237<\/h3>\n<p>Redis \u5e76\u4e0d\u662f\u53bb\u8be2\u95ee Linux&#xff1a;<\/p>\n<p>\u201cPage Cache \u4e2d\u8fd9\u4e2a\u6587\u4ef6\u5230\u5e95\u662f\u4e0d\u662f Dirty&#xff1f;\u201d<\/p>\n<p>\u800c\u662f\u81ea\u5df1\u7ef4\u62a4 AOF \u5199\u5165\u72b6\u6001\u3002<\/p>\n<p>\u53ef\u4ee5\u62bd\u8c61\u6210&#xff1a;<\/p>\n<p>\u5f53\u524d\u5df2\u7ecf\u6210\u529f write \u5230\u54ea\u91cc<br \/>\n        \u2193<br \/>\n\u4f8b\u5982 offset &#061; 1200<\/p>\n<p>\u4e0a\u4e00\u6b21\u5df2\u7ecf\u5b8c\u6210\u6301\u4e45\u5316\u7684\u4f4d\u7f6e<br \/>\n        \u2193<br \/>\n\u4f8b\u5982 offset &#061; 1000<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p>1200 &gt; 1000<\/p>\n<p>\u8bf4\u660e&#xff1a;<\/p>\n<p>\u4e0a\u4e00\u6b21 fsync \u4e4b\u540e\u53c8\u4ea7\u751f\u4e86\u65b0\u7684 AOF \u5199\u5165\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>fsync() \u7684\u8fd4\u56de\u503c\u5e76\u4e0d\u4f1a\u544a\u8bc9 Redis&#xff1a;<\/p>\n<p>\u201c\u6211\u5237\u5230\u4e86 offset &#061; 1200\u201d<\/p>\n<p>fsync \u7684\u8fd4\u56de\u503c\u4e3b\u8981\u7528\u4e8e\u544a\u8bc9\u8c03\u7528\u8005\u8fd9\u6b21\u540c\u6b65\u662f\u5426\u6210\u529f\u3002<\/p>\n<p>Redis \u672c\u8eab\u5df2\u7ecf\u6839\u636e\u6b64\u524d write() \u6210\u529f\u7684\u5b57\u8282\u6570\u77e5\u9053\u5f53\u524d\u6587\u4ef6\u5199\u5165\u4f4d\u7f6e&#xff0c;\u56e0\u6b64\u5728 fsync \u6210\u529f\u4ee5\u540e&#xff0c;\u53ef\u4ee5\u63a8\u8fdb\u81ea\u5df1\u7ef4\u62a4\u7684\u6301\u4e45\u5316\u72b6\u6001\u3002<\/p>\n<hr \/>\n<h3>5. appendfsync no<\/h3>\n<p>no \u8868\u793a&#xff1a;<\/p>\n<p>Redis \u81ea\u5df1\u4e0d\u4e3b\u52a8\u6309\u7167\u56fa\u5b9a\u7b56\u7565\u8c03\u7528 fsync&#xff0c;\u628a\u771f\u6b63\u7684\u810f\u9875\u56de\u5199\u65f6\u673a\u4e3b\u8981\u4ea4\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n<p>\u94fe\u8def\u4ecd\u7136\u6709&#xff1a;<\/p>\n<p>AOF Buffer<br \/>\n\u2193<br \/>\nwrite()<br \/>\n\u2193<br \/>\nPage Cache<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>Page Cache<br \/>\n\u2193<br \/>\n\u4ec0\u4e48\u65f6\u5019\u771f\u6b63\u5237\u5230\u78c1\u76d8<br \/>\n\u2193<br \/>\n\u4e3b\u8981\u7531\u64cd\u4f5c\u7cfb\u7edf\u51b3\u5b9a<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>\u6027\u80fd\u901a\u5e38\u6700\u597d<br \/>\n&#043;<br \/>\n\u6570\u636e\u6301\u4e45\u5316\u7a97\u53e3\u6700\u4e0d\u53ef\u63a7<\/p>\n<hr \/>\n<h3>6. \u4e09\u79cd\u7b56\u7565\u603b\u7ed3<\/h3>\n<table>\n<tr>\u7b56\u7565fsync \u884c\u4e3a\u6027\u80fd\u6570\u636e\u5b89\u5168<\/tr>\n<tbody>\n<tr>\n<td>always<\/td>\n<td>\u6bcf\u6279 AOF \u5199\u5165\u540e\u540c\u6b65 fsync<\/td>\n<td>\u6700\u4f4e<\/td>\n<td>\u6700\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>everysec<\/td>\n<td>\u5927\u7ea6\u6bcf\u79d2\u540e\u53f0 fsync<\/td>\n<td>\u8f83\u9ad8<\/td>\n<td>\u8f83\u9ad8<\/td>\n<\/tr>\n<tr>\n<td>no<\/td>\n<td>Redis \u4e0d\u4e3b\u52a8\u63a7\u5236&#xff0c;\u4e3b\u8981\u4ea4\u7ed9 OS<\/td>\n<td>\u6700\u9ad8<\/td>\n<td>\u6700\u5f31<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u56e0\u6b64 Redis \u9ed8\u8ba4\u901a\u5e38\u9009\u62e9&#xff1a;<\/p>\n<p>appendfsync everysec<\/p>\n<p>\u5176\u672c\u8d28\u5c31\u662f\u5728&#xff1a;<\/p>\n<p>\u541e\u5410 \/ \u5ef6\u8fdf<br \/>\n\u4e0e<br \/>\n\u6570\u636e\u53ef\u9760\u6027<\/p>\n<p>\u4e4b\u95f4\u505a\u6298\u4e2d\u3002<\/p>\n<hr \/>\n<h2>\u516b\u3001no-appendfsync-on-rewrite&#xff1a;\u91cd\u5199\u671f\u95f4\u8fd8\u8981\u4e0d\u8981\u7ee7\u7eed fsync<\/h2>\n<p>\u914d\u7f6e\u6587\u4ef6\u4e2d\u8fd8\u6709&#xff1a;<\/p>\n<p>no-appendfsync-on-rewrite no<\/p>\n<p>\u8fd9\u4e2a\u540d\u5b57\u6bd4\u8f83\u7ed5&#xff0c;\u56e0\u4e3a\u5305\u542b\u53cc\u91cd\u5426\u5b9a\u3002<\/p>\n<p>\u5148\u770b&#xff1a;<\/p>\n<p>no-appendfsync-on-rewrite no<\/p>\n<p>\u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u5728 BGSAVE \/ BGREWRITEAOF \u7b49\u540e\u53f0\u6301\u4e45\u5316\u4efb\u52a1\u671f\u95f4&#xff0c;\u4e0d\u7981\u6b62 AOF fsync\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5982\u679c\u539f\u6765\u914d\u7f6e&#xff1a;<\/p>\n<p>appendfsync everysec<\/p>\n<p>\u90a3\u4e48\u540e\u53f0\u6b63\u5728\u751f\u6210 RDB \u6216 AOF Rewrite \u65f6&#xff0c;AOF \u4ecd\u7136\u6309\u7167 everysec \u7684\u7b56\u7565\u5237\u76d8\u3002<\/p>\n<p>\u4f18\u70b9&#xff1a;<\/p>\n<p>\u6570\u636e\u6301\u4e45\u6027\u66f4\u597d<\/p>\n<p>\u7f3a\u70b9&#xff1a;<\/p>\n<p>\u540e\u53f0\u5b50\u8fdb\u7a0b\u6b63\u5728\u5927\u91cf\u78c1\u76d8 IO<br \/>\n&#043;<br \/>\nAOF \u4ecd\u5728 fsync<br \/>\n\u2193<br \/>\n\u78c1\u76d8\u7ade\u4e89\u52a0\u5267<br \/>\n\u2193<br \/>\n\u5ef6\u8fdf\u53ef\u80fd\u4e0a\u5347<\/p>\n<p>\u5982\u679c\u914d\u7f6e&#xff1a;<\/p>\n<p>no-appendfsync-on-rewrite yes<\/p>\n<p>\u8868\u793a&#xff1a;<\/p>\n<p>\u5728 BGSAVE \/ BGREWRITEAOF \u671f\u95f4\u6682\u65f6\u4e0d\u4e3b\u52a8 fsync AOF\u3002<\/p>\n<p>\u6b64\u65f6 AOF \u7684 durability \u5728\u8fd9\u4e00\u6bb5\u65f6\u95f4\u5185\u66f4\u63a5\u8fd1&#xff1a;<\/p>\n<p>appendfsync no<\/p>\n<p>\u4e5f\u5c31\u662f\u4e3b\u8981\u4f9d\u8d56\u64cd\u4f5c\u7cfb\u7edf\u81ea\u884c\u56de\u5199\u3002<\/p>\n<p>\u6240\u4ee5\u672c\u8d28\u662f&#xff1a;<\/p>\n<p>yes<br \/>\n\u2192 \u7528\u4e00\u90e8\u5206\u6570\u636e\u53ef\u9760\u6027\u6362\u5ef6\u8fdf<\/p>\n<p>no<br \/>\n\u2192 \u91cd\u5199\u671f\u95f4\u4ecd\u4fdd\u6301\u539f fsync \u7b56\u7565<br \/>\n\u2192 \u66f4\u5b89\u5168<\/p>\n<p>\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a&#xff1a;<\/p>\n<p>no<\/p>\n<p>\u6b63\u662f\u56e0\u4e3a\u4ece\u6301\u4e45\u6027\u89d2\u5ea6\u66f4\u52a0\u7a33\u59a5\u3002<\/p>\n<hr \/>\n<h2>\u4e5d\u3001\u4e3a\u4ec0\u4e48 AOF \u5fc5\u987b\u91cd\u5199<\/h2>\n<p>AOF \u7684\u6838\u5fc3\u5199\u5165\u65b9\u5f0f\u662f&#xff1a;<\/p>\n<p>Append Only<\/p>\n<p>\u5373\u53ea\u8ffd\u52a0&#xff0c;\u4e0d\u4fee\u6539\u524d\u9762\u5df2\u7ecf\u5b58\u5728\u7684\u5386\u53f2\u8bb0\u5f55\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>SET age 1<br \/>\nSET age 2<br \/>\nSET age 3<br \/>\nSET age 4<br \/>\nSET age 5<\/p>\n<p>\u6700\u7ec8\u771f\u6b63\u6709\u610f\u4e49\u7684\u72b6\u6001\u53ea\u6709&#xff1a;<\/p>\n<p>age &#061; 5<\/p>\n<p>\u4f46\u662f AOF \u5982\u679c\u4e00\u76f4\u4e0d\u5904\u7406&#xff0c;\u524d\u9762\u7684\u5386\u53f2\u547d\u4ee4\u4ecd\u7136\u5168\u90e8\u4fdd\u7559\u3002<\/p>\n<p>\u8fd0\u884c\u65f6\u95f4\u8d8a\u6765\u8d8a\u957f\u4ee5\u540e&#xff1a;<\/p>\n<p>\u5199\u64cd\u4f5c\u8d8a\u6765\u8d8a\u591a<br \/>\n\u2193<br \/>\nAOF \u6587\u4ef6\u8d8a\u6765\u8d8a\u5927<\/p>\n<p>\u4f1a\u5e26\u6765\u51e0\u4e2a\u95ee\u9898\u3002<\/p>\n<hr \/>\n<h3>1. \u78c1\u76d8\u7a7a\u95f4\u4e0d\u65ad\u589e\u5927<\/h3>\n<p>\u8fd9\u662f\u6700\u76f4\u89c2\u7684\u95ee\u9898\u3002<\/p>\n<p>AOF \u4fdd\u5b58\u5927\u91cf\u5386\u53f2\u547d\u4ee4&#xff0c;\u800c\u5176\u4e2d\u5f88\u591a\u547d\u4ee4\u4ece\u6700\u7ec8\u72b6\u6001\u89d2\u5ea6\u770b\u5df2\u7ecf\u6ca1\u6709\u610f\u4e49\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>SET x 1<br \/>\nSET x 2<br \/>\nSET x 3<br \/>\nDEL x<br \/>\nSET x 100<\/p>\n<p>\u771f\u6b63\u6062\u590d\u5f53\u524d\u72b6\u6001\u53ea\u9700\u8981&#xff1a;<\/p>\n<p>SET x 100<\/p>\n<p>\u524d\u9762\u7684\u64cd\u4f5c\u90fd\u5c5e\u4e8e\u5386\u53f2\u8fc7\u7a0b\u3002<\/p>\n<hr \/>\n<h3>2. Redis \u542f\u52a8\u6062\u590d\u8d8a\u6765\u8d8a\u6162<\/h3>\n<p>AOF \u6062\u590d\u4e0d\u662f\u5355\u7eaf&#xff1a;<\/p>\n<p>\u8bfb\u53d6\u6587\u4ef6<\/p>\n<p>\u8fd8\u9700\u8981&#xff1a;<\/p>\n<p>\u89e3\u6790 RESP<br \/>\n\u2193<br \/>\n\u6062\u590d\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u91cd\u65b0\u6267\u884c\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u4fee\u6539 Redis \u5185\u90e8\u6570\u636e\u7ed3\u6784<\/p>\n<p>\u800c\u6b64\u524d\u5b66\u4e60 Redis \u547d\u4ee4\u65f6&#xff0c;\u6211\u4eec\u5df2\u7ecf\u5206\u6790\u8fc7&#xff1a;<\/p>\n<p>SET<br \/>\nZADD<br \/>\nLPUSH<br \/>\nHSET<br \/>\n&#8230;<\/p>\n<p>\u8fd9\u4e9b\u64cd\u4f5c\u672c\u8eab\u90fd\u6709\u81ea\u5df1\u7684\u6267\u884c\u6210\u672c\u548c\u590d\u6742\u5ea6\u3002<\/p>\n<p>\u56e0\u6b64\u5982\u679c Redis \u8fd0\u884c\u51e0\u5e74\u4ee5\u540e\u79ef\u7d2f\u4e86\u6d77\u91cf\u5386\u53f2\u547d\u4ee4&#xff1a;<\/p>\n<p>AOF \u8bfb\u53d6\u6210\u672c<br \/>\n&#043;<br \/>\nRESP \u89e3\u6790\u6210\u672c<br \/>\n&#043;<br \/>\n\u547d\u4ee4\u91cd\u653e\u6210\u672c<\/p>\n<p>\u90fd\u4f1a\u589e\u52a0\u3002<\/p>\n<p>\u6700\u7ec8&#xff1a;<\/p>\n<p>Redis \u91cd\u542f\u6062\u590d\u4f1a\u8d8a\u6765\u8d8a\u6162\u3002<\/p>\n<p>\u6240\u4ee5 AOF \u5fc5\u987b\u62e5\u6709\u4e00\u4e2a\u201c\u538b\u7f29\u5386\u53f2\u201d\u7684\u673a\u5236\u3002<\/p>\n<p>\u8fd9\u4e2a\u673a\u5236\u5c31\u662f&#xff1a;<\/p>\n<p>AOF Rewrite<\/p>\n<hr \/>\n<h2>\u5341\u3001AOF Rewrite&#xff1a;\u4e0d\u662f\u626b\u63cf\u65e7\u65e5\u5fd7\u505a\u53bb\u91cd<\/h2>\n<p>\u8fd9\u91cc\u4e00\u5b9a\u8981\u7ea0\u6b63\u4e00\u4e2a\u975e\u5e38\u5bb9\u6613\u5f62\u6210\u7684\u8bef\u533a\u3002<\/p>\n<p>\u6240\u8c13 AOF Rewrite&#xff0c;\u4e0d\u662f&#xff1a;<\/p>\n<p>\u6253\u5f00\u65e7 AOF<br \/>\n\u2193<br \/>\n\u4ece\u5934\u626b\u63cf<br \/>\n\u2193<br \/>\n\u89e3\u6790\u6bcf\u6761\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u8fdb\u884c\u8bed\u6cd5\u5206\u6790<br \/>\n\u2193<br \/>\n\u5224\u65ad\u54ea\u4e9b\u547d\u4ee4\u5197\u4f59<br \/>\n\u2193<br \/>\n\u5220\u9664\u91cd\u590d\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u5f97\u5230\u538b\u7f29\u6587\u4ef6<\/p>\n<p>Redis \u4e0d\u9700\u8981\u8fd9\u6837\u505a\u3002<\/p>\n<p>\u56e0\u4e3a Redis \u5185\u5b58\u4e2d\u5df2\u7ecf\u5b58\u5728&#xff1a;<\/p>\n<p>\u6240\u6709\u5386\u53f2\u547d\u4ee4\u6267\u884c\u5b8c\u6210\u4ee5\u540e\u5f97\u5230\u7684\u6700\u7ec8\u6570\u636e\u5e93\u72b6\u6001\u3002<\/p>\n<p>\u6240\u4ee5\u66f4\u52a0\u76f4\u63a5\u7684\u65b9\u5f0f\u662f&#xff1a;<\/p>\n<p>\u76f4\u63a5\u8bfb\u53d6 Redis \u5f53\u524d\u6570\u636e\u5e93\u72b6\u6001<br \/>\n\u2193<br \/>\n\u6839\u636e\u5f53\u524d\u72b6\u6001<br \/>\n\u2193<br \/>\n\u91cd\u65b0\u751f\u6210\u4e00\u7ec4\u80fd\u591f\u76f4\u63a5\u6784\u9020\u51fa\u8be5\u72b6\u6001\u7684\u547d\u4ee4<\/p>\n<p>\u4f8b\u5982\u65e7 AOF&#xff1a;<\/p>\n<p>SET age 1<br \/>\nSET age 2<br \/>\nSET age 3<br \/>\nDEL age<br \/>\nSET age 100<\/p>\n<p>\u5f53\u524d\u5185\u5b58&#xff1a;<\/p>\n<p>age &#061; 100<\/p>\n<p>\u90a3\u4e48 Rewrite \u53ea\u9700\u8981\u751f\u6210\u8db3\u591f\u6062\u590d\u5f53\u524d\u72b6\u6001\u7684\u547d\u4ee4&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p>SET age 100<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>AOF Rewrite \u7684\u8f93\u5165\u6838\u5fc3\u662f\u5f53\u524d\u5185\u5b58\u72b6\u6001&#xff0c;\u800c\u4e0d\u662f\u65e7 AOF \u5386\u53f2\u672c\u8eab\u3002<\/p>\n<hr \/>\n<h3>1. AOF Rewrite \u548c RDB \u4e3a\u4ec0\u4e48\u770b\u8d77\u6765\u5f88\u50cf<\/h3>\n<p>\u8fd9\u91cc\u4f1a\u51fa\u73b0\u4e00\u4e2a\u975e\u5e38\u81ea\u7136\u7684\u95ee\u9898&#xff1a;<\/p>\n<p>AOF Rewrite \u65e2\u7136\u4e5f\u662f\u6839\u636e\u5f53\u524d\u72b6\u6001\u91cd\u65b0\u751f\u6210\u4e00\u4efd\u57fa\u51c6&#xff0c;\u90a3\u8fd9\u4e0d\u5c31\u662f\u201c\u62cd\u5feb\u7167\u201d\u5417&#xff1f;<\/p>\n<p>\u4ece\u201c\u601d\u60f3\u201d\u4e0a\u770b&#xff0c;\u4e24\u8005\u786e\u5b9e\u975e\u5e38\u63a5\u8fd1&#xff1a;<\/p>\n<p>RDB<br \/>\n\u2192 \u6839\u636e\u5f53\u524d\u72b6\u6001\u751f\u6210\u72b6\u6001\u5feb\u7167<\/p>\n<p>AOF Rewrite<br \/>\n\u2192 \u6839\u636e\u5f53\u524d\u72b6\u6001\u751f\u6210\u4e00\u4efd\u65b0\u7684\u6062\u590d\u57fa\u51c6<\/p>\n<p>\u533a\u522b\u4e3b\u8981\u5728\u6700\u7ec8\u8868\u793a\u65b9\u5f0f\u3002<\/p>\n<p>\u7ecf\u5178 AOF Rewrite \u4e2d&#xff1a;<\/p>\n<p>\u5f53\u524d\u72b6\u6001<br \/>\n\u2193<br \/>\n\u8f6c\u6362\u6210\u80fd\u591f\u6062\u590d\u8be5\u72b6\u6001\u7684\u547d\u4ee4<\/p>\n<p>RDB \u4e2d&#xff1a;<\/p>\n<p>\u5f53\u524d\u72b6\u6001<br \/>\n\u2193<br \/>\n\u7f16\u7801\u6210 RDB \u4e8c\u8fdb\u5236\u5feb\u7167<\/p>\n<p>\u6240\u4ee5\u53ef\u4ee5\u8fdb\u4e00\u6b65\u5f62\u6210&#xff1a;<\/p>\n<p>AOF Rewrite \u628a\u4e00\u6bb5\u5f88\u957f\u7684\u5386\u53f2\u8fc7\u7a0b\u6298\u53e0\u6210\u4e00\u4e2a\u65b0\u7684\u5f53\u524d\u72b6\u6001\u8d77\u70b9\u3002<\/p>\n<hr \/>\n<h3>2. \u4e3a\u4ec0\u4e48\u4e4b\u524d\u7684 AOF \u589e\u91cf\u8bb0\u5f55\u4e0d\u662f\u767d\u5199<\/h3>\n<p>\u5982\u679c\u6211\u4eec\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u624d\u751f\u6210\u4e00\u6b21\u57fa\u51c6&#xff0c;\u800c\u4e2d\u95f4\u5b8c\u5168\u4e0d\u8bb0\u5f55\u53d8\u5316&#xff1a;<\/p>\n<p>t0&#xff1a;\u751f\u6210\u57fa\u51c6<br \/>\n\u2193<br \/>\nt0 ~ t1&#xff1a;\u53d1\u751f\u5927\u91cf\u4fee\u6539<br \/>\n\u2193<br \/>\nRedis \u7a81\u7136\u5b95\u673a<\/p>\n<p>\u90a3\u4e48 t0 \u5230\u5b95\u673a\u4e4b\u95f4\u7684\u6570\u636e\u8fd8\u662f\u5168\u90e8\u4e22\u5931&#xff0c;\u8fd9\u53c8\u9000\u5316\u6210\u4e86 RDB \u7684\u6570\u636e\u7a97\u53e3\u95ee\u9898\u3002<\/p>\n<p>\u6240\u4ee5 AOF \u7684\u672c\u8d28\u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u57fa\u51c6<br \/>\n&#043;<br \/>\n\u57fa\u51c6\u4e4b\u540e\u7684\u589e\u91cf\u65e5\u5fd7<\/p>\n<p>\u5373&#xff1a;<\/p>\n<p>Checkpoint &#043; Incremental Log<\/p>\n<p>\u91cd\u5199\u53ea\u662f&#xff1a;<\/p>\n<p>\u65e7\u57fa\u51c6 &#043; \u5927\u91cf\u589e\u91cf\u5386\u53f2<br \/>\n        \u2193<br \/>\n\u91cd\u65b0\u6298\u53e0<br \/>\n        \u2193<br \/>\n\u65b0\u57fa\u51c6<\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>\u65b0\u57fa\u51c6<br \/>\n&#043;<br \/>\n\u7ee7\u7eed\u8bb0\u5f55\u65b0\u7684\u589e\u91cf<\/p>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48 AOF \u53ef\u4ee5\u540c\u65f6\u517c\u987e&#xff1a;<\/p>\n<p>\u6062\u590d\u57fa\u51c6\u4e0d\u8981\u592a\u5e9e\u5927<br \/>\n&#043;<br \/>\n\u4e2d\u95f4\u53d8\u5316\u4ecd\u7136\u7ec6\u7c92\u5ea6\u8bb0\u5f55<\/p>\n<hr \/>\n<h2>\u5341\u4e00\u3001Redis 7.0 \u4e4b\u524d&#xff1a;\u7ecf\u5178 AOF Rewrite \u673a\u5236<\/h2>\n<p>\u7406\u89e3\u4e86\u539f\u7406\u4ee5\u540e&#xff0c;\u518d\u770b\u5b9e\u73b0\u673a\u5236\u3002<\/p>\n<p>\u7ecf\u5178 Redis AOF Rewrite \u540c\u6837\u4f7f\u7528&#xff1a;<\/p>\n<p>fork &#043; Copy On Write<\/p>\n<hr \/>\n<h3>1. fork \u5b50\u8fdb\u7a0b<\/h3>\n<p>\u89e6\u53d1&#xff1a;<\/p>\n<p>BGREWRITEAOF<\/p>\n<p>\u4ee5\u540e&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b<br \/>\n\u2193<br \/>\nfork()<br \/>\n\u2193<br \/>\n\u5b50\u8fdb\u7a0b<\/p>\n<p>\u5b50\u8fdb\u7a0b\u770b\u5230&#xff1a;<\/p>\n<p>fork \u65f6\u523b t0 \u7684\u6570\u636e\u5e93\u89c6\u56fe<\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>\u904d\u5386\u5f53\u524d KV<br \/>\n\u2193<br \/>\n\u6839\u636e\u6700\u7ec8\u72b6\u6001<br \/>\n\u2193<br \/>\n\u751f\u6210\u65b0\u7684\u4e34\u65f6 AOF<\/p>\n<p>\u4e0e\u6b64\u540c\u65f6&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b\u7ee7\u7eed\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42<\/p>\n<p>\u8fd9\u91cc\u81ea\u7136\u4f1a\u51fa\u73b0\u4e00\u4e2a\u95ee\u9898&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b\u751f\u6210\u7684\u662f t0 \u65f6\u523b\u7684\u6570\u636e&#xff0c;\u800c\u7236\u8fdb\u7a0b t0 \u4e4b\u540e\u8fd8\u5728\u7ee7\u7eed\u5904\u7406 SET\u3001INCR\u3001DEL \u7b49\u64cd\u4f5c&#xff0c;\u8fd9\u4e9b\u65b0\u7684\u53d8\u5316\u600e\u4e48\u529e&#xff1f;<\/p>\n<hr \/>\n<h3>2. \u7236\u8fdb\u7a0b\u9700\u8981\u5199\u201c\u4e24\u4efd\u201d<\/h3>\n<p>Redis 7.0 \u4e4b\u524d\u7684\u7ecf\u5178\u5fc3\u667a\u6a21\u578b\u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>t0 \u4e4b\u540e\u7684\u65b0\u5199\u547d\u4ee4<br \/>\n        \u2502<br \/>\n        \u251c\u2500\u2500\u2192 \u6b63\u5e38 AOF Buffer<br \/>\n        \u2502       \u2193<br \/>\n        \u2502     \u7ee7\u7eed\u5199\u65e7 AOF<br \/>\n        \u2502<br \/>\n        \u2514\u2500\u2500\u2192 AOF Rewrite Buffer<\/p>\n<p>\u4e3a\u4ec0\u4e48\u8fd8\u8981\u7ee7\u7eed\u5199\u65e7 AOF&#xff1f;<\/p>\n<p>\u56e0\u4e3a&#xff1a;<\/p>\n<p>\u5982\u679c\u8fd9\u6b21 Rewrite \u5931\u8d25\u4e86&#xff0c;\u65e7 AOF \u4ecd\u7136\u5fc5\u987b\u4fdd\u6301\u5b8c\u6574\u53ef\u6062\u590d\u3002<\/p>\n<p>\u6240\u4ee5\u65e7 AOF \u4e0d\u80fd\u56e0\u4e3a\u201c\u6211\u73b0\u5728\u51c6\u5907\u751f\u6210\u65b0 AOF\u201d\u5c31\u505c\u6b62\u7ef4\u62a4\u3002<\/p>\n<p>\u4e0e\u6b64\u540c\u65f6&#xff0c;AOF Rewrite Buffer \u4fdd\u5b58&#xff1a;<\/p>\n<p>t0 \u4e4b\u540e\u4ea7\u751f\u7684\u589e\u91cf\u53d8\u5316<\/p>\n<p>\u8fd9\u4e9b\u53d8\u5316\u6700\u7ec8\u8981\u8865\u5230\u5b50\u8fdb\u7a0b\u751f\u6210\u7684\u65b0 AOF \u540e\u9762\u3002<\/p>\n<hr \/>\n<h3>3. \u5b50\u8fdb\u7a0b\u5b8c\u6210\u4ee5\u540e<\/h3>\n<p>\u5b50\u8fdb\u7a0b\u6700\u7ec8\u751f\u6210&#xff1a;<\/p>\n<p>\u4e34\u65f6\u65b0 AOF<br \/>\n&#061;<br \/>\nt0 \u65f6\u523b\u72b6\u6001\u5bf9\u5e94\u7684\u6062\u590d\u547d\u4ee4<\/p>\n<p>\u5b50\u8fdb\u7a0b\u5b8c\u6210\u4efb\u52a1\u540e\u9000\u51fa\u3002<\/p>\n<p>\u7236\u8fdb\u7a0b\u68c0\u6d4b\u5230\u5b50\u8fdb\u7a0b\u7ed3\u675f\u4ee5\u540e&#xff1a;<\/p>\n<p>AOF Rewrite Buffer<br \/>\n\u2193<br \/>\n\u8ffd\u52a0\u5230\u4e34\u65f6\u65b0 AOF \u6587\u4ef6\u672b\u5c3e<\/p>\n<p>\u6700\u7ec8&#xff1a;<\/p>\n<p>\u65b0 AOF<br \/>\n&#061;<br \/>\nt0 \u65f6\u523b\u57fa\u51c6<br \/>\n&#043;<br \/>\nt0 \u4e4b\u540e\u7684\u65b0\u589e\u547d\u4ee4<\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>rename<br \/>\n\u2193<br \/>\n\u539f\u5b50\u66ff\u6362\u65e7 AOF<\/p>\n<p>\u6240\u4ee5\u5b8c\u6574\u94fe\u8def&#xff1a;<\/p>\n<p>             fork &#064; t0<br \/>\n                \u2502<br \/>\n      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n      \u2193                   \u2193<br \/>\n    \u5b50\u8fdb\u7a0b              \u7236\u8fdb\u7a0b<br \/>\n      \u2193                   \u2193<br \/>\n\u6839\u636e t0 \u72b6\u6001       \u7ee7\u7eed\u6267\u884c\u65b0\u5199\u547d\u4ee4<br \/>\n\u751f\u6210\u4e34\u65f6 AOF            \u2502<br \/>\n                         \u251c\u2192 \u65e7 AOF<br \/>\n                         \u2502<br \/>\n                         \u2514\u2192 Rewrite Buffer<br \/>\n      \u2502<br \/>\n      \u2193<br \/>\n\u5b50\u8fdb\u7a0b\u5b8c\u6210<br \/>\n      \u2193<br \/>\n\u7236\u8fdb\u7a0b\u5c06 Rewrite Buffer<br \/>\n\u8ffd\u52a0\u5230\u4e34\u65f6 AOF \u5c3e\u90e8<br \/>\n      \u2193<br \/>\nrename<br \/>\n      \u2193<br \/>\n\u66ff\u6362\u65e7 AOF<\/p>\n<p>\u6e90\u7801\u7248\u672c\u7684\u7ec6\u8282\u53ef\u80fd\u8fd8\u4f1a\u901a\u8fc7\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7b49\u65b9\u5f0f\u51cf\u5c11\u6700\u7ec8\u8865\u5c3e\u9636\u6bb5\u7684\u505c\u987f&#xff0c;\u4f46\u662f\u5b66\u4e60\u4e3b\u7ebf\u65f6&#xff0c;\u5148\u7528\u201c\u65e7 AOF &#043; Rewrite Buffer &#043; \u4e34\u65f6\u65b0 AOF &#043; rename\u201d\u5efa\u7acb\u6a21\u578b\u5373\u53ef\u3002<\/p>\n<hr \/>\n<h2>\u5341\u4e8c\u3001BGREWRITEAOF&#xff1a;\u624b\u52a8\u89e6\u53d1\u4e0e\u5e76\u53d1\u9650\u5236<\/h2>\n<p>\u624b\u52a8\u89e6\u53d1 AOF Rewrite \u4f7f\u7528&#xff1a;<\/p>\n<p>BGREWRITEAOF<\/p>\n<p>\u5176\u4f5c\u7528\u5c31\u662f&#xff1a;<\/p>\n<p>\u8bf7\u6c42 Redis<br \/>\n\u2193<br \/>\n\u5728\u540e\u53f0\u8fdb\u884c\u4e00\u6b21 AOF Rewrite<\/p>\n<p>\u5982\u679c\u5f53\u524d\u5df2\u7ecf\u5b58\u5728\u4e00\u4e2a AOF Rewrite \u5b50\u8fdb\u7a0b&#xff1a;<\/p>\n<p>BGREWRITEAOF<br \/>\n\u2193<br \/>\n\u4e0d\u4f1a\u518d fork \u7b2c\u4e8c\u4e2a AOF Rewrite \u5b50\u8fdb\u7a0b<\/p>\n<p>Redis \u4f1a\u62d2\u7edd\u91cd\u590d\u6267\u884c\u3002<\/p>\n<p>\u56e0\u4e3a\u591a\u4e2a\u91cd\u578b\u6301\u4e45\u5316\u5b50\u8fdb\u7a0b\u540c\u65f6\u5de5\u4f5c&#xff0c;\u4f1a\u5e26\u6765&#xff1a;<\/p>\n<p>fork \u6210\u672c<br \/>\n&#043;<br \/>\nCOW \u5185\u5b58\u538b\u529b<br \/>\n&#043;<br \/>\nCPU \u7ade\u4e89<br \/>\n&#043;<br \/>\n\u78c1\u76d8 IO \u7ade\u4e89<\/p>\n<hr \/>\n<h3>1. \u5982\u679c\u6b64\u65f6\u6b63\u5728 BGSAVE \u5462<\/h3>\n<p>\u5982\u679c\u5f53\u524d\u4e0d\u662f AOF Rewrite&#xff0c;\u800c\u662f&#xff1a;<\/p>\n<p>BGSAVE \u6b63\u5728\u8fdb\u884c<\/p>\n<p>\u6b64\u65f6\u8bf7\u6c42&#xff1a;<\/p>\n<p>BGREWRITEAOF<\/p>\n<p>Redis \u4e0d\u4f1a\u540c\u65f6\u518d\u542f\u52a8\u4e00\u4e2a AOF Rewrite \u5b50\u8fdb\u7a0b\u3002<\/p>\n<p>\u4f46\u662f\u8fd9\u4e2a\u8bf7\u6c42\u53ef\u4ee5\u88ab&#xff1a;<\/p>\n<p>\u6807\u8bb0\u4e3a\u7a0d\u540e\u6267\u884c<\/p>\n<p>\u7b49 BGSAVE \u5b50\u8fdb\u7a0b\u7ed3\u675f\u4ee5\u540e&#xff0c;\u518d\u542f\u52a8 AOF Rewrite\u3002<\/p>\n<p>\u56e0\u6b64\u53ef\u4ee5\u8bb0\u6210&#xff1a;<\/p>\n<p>\u5df2\u6709 AOF Rewrite<br \/>\n\u2192 \u65b0 BGREWRITEAOF \u62d2\u7edd<\/p>\n<p>\u5df2\u6709 BGSAVE<br \/>\n\u2192 BGREWRITEAOF \u5ef6\u540e<br \/>\n\u2192 \u7b49 BGSAVE \u7ed3\u675f\u540e\u518d\u6267\u884c<\/p>\n<hr \/>\n<h2>\u5341\u4e09\u3001\u5b50\u8fdb\u7a0b\u7ed3\u675f\u4ee5\u540e&#xff0c;\u7236\u8fdb\u7a0b\u600e\u4e48\u77e5\u9053<\/h2>\n<p>Linux \u4e2d&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b\u9000\u51fa<\/p>\n<p>\u4f1a\u4ea7\u751f\u5b50\u8fdb\u7a0b\u72b6\u6001\u53d8\u5316&#xff0c;\u7236\u8fdb\u7a0b\u6700\u7ec8\u9700\u8981\u901a\u8fc7&#xff1a;<\/p>\n<p><span class=\"token function\">waitpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">,<\/span> WNOHANG<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u4e4b\u7c7b\u7684\u65b9\u5f0f\u56de\u6536\u5b50\u8fdb\u7a0b\u5e76\u83b7\u53d6\u9000\u51fa\u72b6\u6001\u3002<\/p>\n<p>\u4ece\u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5\u4e0a\u770b&#xff0c;\u5b50\u8fdb\u7a0b\u9000\u51fa\u548c&#xff1a;<\/p>\n<p>SIGCHLD<\/p>\n<p>\u8054\u7cfb\u5728\u4e00\u8d77&#xff0c;\u56e0\u6b64\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210\u4e00\u79cd\u5f02\u6b65\u4e8b\u4ef6\u901a\u77e5\u8bed\u4e49\u3002<\/p>\n<p>\u4f46\u662f\u8fd9\u91cc\u9700\u8981\u8fdb\u4e00\u6b65\u628a Redis \u7684\u5b9e\u73b0\u6a21\u578b\u8bf4\u4e25\u8c28&#xff1a;<\/p>\n<p>Redis \u4e0d\u4f1a\u8ba9\u4e3b\u7ebf\u7a0b\u963b\u585e\u5728 wait \u4e0a\u7b49\u5f85\u540e\u53f0\u5b50\u8fdb\u7a0b\u7ed3\u675f&#xff0c;\u4e5f\u4e0d\u4f1a\u628a\u590d\u6742\u7684 RDB\/AOF \u6536\u5c3e\u903b\u8f91\u5168\u90e8\u585e\u5230 signal handler \u91cc\u3002<\/p>\n<p>Redis \u4e3b\u5faa\u73af\u4e2d\u7684\u5468\u671f\u4efb\u52a1\u4f1a\u975e\u963b\u585e\u68c0\u67e5\u540e\u53f0\u5b50\u8fdb\u7a0b&#xff1a;<\/p>\n<p>serverCron<br \/>\n\u2193<br \/>\ncheckChildrenDone<br \/>\n\u2193<br \/>\nwaitpid(&#8230;, WNOHANG)<\/p>\n<p>\u4e00\u65e6\u53d1\u73b0\u540e\u53f0\u5b50\u8fdb\u7a0b\u7ed3\u675f&#xff0c;\u518d\u6839\u636e&#xff1a;<\/p>\n<p>RDB child<br \/>\n\u8fd8\u662f<br \/>\nAOF child<\/p>\n<p>\u8c03\u7528\u76f8\u5e94\u7684\u5b8c\u6210\u5904\u7406\u903b\u8f91\u3002<\/p>\n<p>\u6240\u4ee5\u8fd9\u91cc\u771f\u6b63\u5e94\u8be5\u5efa\u7acb\u7684\u662f&#xff1a;<\/p>\n<p>\u540e\u53f0\u5b50\u8fdb\u7a0b\u5de5\u4f5c<br \/>\n\u2193<br \/>\n\u4e3b\u8fdb\u7a0b\u7ee7\u7eed\u670d\u52a1<br \/>\n\u2193<br \/>\n\u4e3b\u8fdb\u7a0b\u5468\u671f\u6027\u975e\u963b\u585e\u68c0\u67e5\u5b50\u8fdb\u7a0b\u72b6\u6001<br \/>\n\u2193<br \/>\n\u53d1\u73b0\u7ed3\u675f<br \/>\n\u2193<br \/>\n\u6267\u884c RDB \/ AOF \u5bf9\u5e94\u6536\u5c3e<\/p>\n<hr \/>\n<h2>\u5341\u56db\u3001Redis 7.0&#xff1a;AOF Rewrite \u673a\u5236\u7684\u91cd\u8981\u6f14\u8fdb<\/h2>\n<p>Redis 7.0 \u4e4b\u540e&#xff0c;AOF \u7ed3\u6784\u53d1\u751f\u4e86\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u53d8\u5316&#xff1a;<\/p>\n<p>Single AOF<br \/>\n\u2193<br \/>\nMulti-Part AOF<\/p>\n<p>\u4e5f\u5c31\u662f&#xff1a;<\/p>\n<p>AOF \u4e0d\u518d\u5fc5\u987b\u7531\u5355\u4e00\u6587\u4ef6\u627f\u62c5\u5168\u90e8\u804c\u8d23\u3002<\/p>\n<p>Redis 7.0&#043; \u53ef\u4ee5\u628a AOF \u62c6\u6210&#xff1a;<\/p>\n<p>Base AOF<br \/>\n&#043;<br \/>\n\u4e00\u4e2a\u6216\u591a\u4e2a Incremental AOF<br \/>\n&#043;<br \/>\nManifest<\/p>\n<hr \/>\n<h3>1. Base&#xff1a;\u8d1f\u8d23\u4fdd\u5b58\u4e00\u4e2a\u5b8c\u6574\u57fa\u51c6<\/h3>\n<p>Base \u7684\u804c\u8d23\u662f&#xff1a;<\/p>\n<p>\u63cf\u8ff0\u67d0\u4e00\u4e2a\u65f6\u523b\u5b8c\u6574\u7684\u6570\u636e\u5e93\u72b6\u6001\u3002<\/p>\n<p>\u5b83\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p>AOF \u683c\u5f0f<\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528&#xff1a;<\/p>\n<p>RDB \u683c\u5f0f<\/p>\n<p>\u800c\u9ed8\u8ba4\u901a\u5e38\u66f4\u503e\u5411 RDB \u683c\u5f0f&#xff0c;\u56e0\u4e3a&#xff1a;<\/p>\n<p>\u6587\u4ef6\u66f4\u7d27\u51d1<br \/>\n&#043;<br \/>\n\u52a0\u8f7d\u66f4\u5feb<br \/>\n&#043;<br \/>\n\u4f5c\u4e3a\u201c\u72b6\u6001\u57fa\u51c6\u201d\u975e\u5e38\u5408\u9002<\/p>\n<p>\u6240\u4ee5\u8fd9\u91cc\u53ef\u4ee5\u770b\u5230\u4e00\u4e2a\u5f88\u81ea\u7136\u7684\u7ec4\u5408&#xff1a;<\/p>\n<p>Base<br \/>\n\u2192 RDB \u64c5\u957f\u4fdd\u5b58\u5b8c\u6574\u72b6\u6001<\/p>\n<p>Incremental<br \/>\n\u2192 AOF \u64c5\u957f\u8bb0\u5f55\u540e\u7eed\u53d8\u5316<\/p>\n<hr \/>\n<h3>2. Incremental AOF&#xff1a;\u8d1f\u8d23\u4fdd\u5b58\u57fa\u51c6\u4e4b\u540e\u7684\u65b0\u53d8\u5316<\/h3>\n<p>\u5047\u8bbe&#xff1a;<\/p>\n<p>t0<\/p>\n<p>\u5f00\u59cb\u4e00\u6b21 Rewrite\u3002<\/p>\n<p>\u7236\u8fdb\u7a0b\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684&#xff1a;<\/p>\n<p>incr.aof<\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>t0 \u4e4b\u540e\u53d1\u751f\u7684 SET<br \/>\nt0 \u4e4b\u540e\u53d1\u751f\u7684 INCR<br \/>\nt0 \u4e4b\u540e\u53d1\u751f\u7684 DEL<br \/>\n&#8230;<\/p>\n<p>\u5168\u90e8\u7ee7\u7eed\u8ffd\u52a0\u5230\u65b0\u7684 Incremental AOF\u3002<\/p>\n<p>\u4e0e\u6b64\u540c\u65f6\u5b50\u8fdb\u7a0b&#xff1a;<\/p>\n<p>\u6839\u636e t0 \u65f6\u523b\u7684\u5185\u5b58\u89c6\u56fe<br \/>\n\u2193<br \/>\n\u751f\u6210\u65b0\u7684 Base<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b<br \/>\n\u2192 \u65b0 Base<\/p>\n<p>\u7236\u8fdb\u7a0b<br \/>\n\u2192 \u65b0 Incremental AOF<\/p>\n<p>\u5b83\u4eec\u5199\u7684\u662f\u4e0d\u540c\u6587\u4ef6\u3002<\/p>\n<p>\u6240\u4ee5\u4e0d\u9700\u8981&#xff1a;<\/p>\n<p>\u7236\u5b50\u8fdb\u7a0b\u62a2\u540c\u4e00\u4e2a AOF \u6587\u4ef6<br \/>\n&#043;<br \/>\n\u901a\u8fc7\u6587\u4ef6\u9501\u534f\u8c03<\/p>\n<p>\u771f\u6b63\u5b58\u5728\u7684\u7ade\u4e89\u4e3b\u8981\u53d8\u6210&#xff1a;<\/p>\n<p>\u78c1\u76d8 IO \u5e26\u5bbd\u7ade\u4e89<\/p>\n<hr \/>\n<h3>3. \u4e3a\u4ec0\u4e48 Redis 7.0 \u4ee5\u540e\u4e0d\u9700\u8981\u7ecf\u5178 Rewrite Buffer<\/h3>\n<p>Redis 7.0 \u4e4b\u524d&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b<br \/>\n\u2192 \u7ee7\u7eed\u5199\u65e7 AOF<br \/>\n&#043;<br \/>\n\u2192 Rewrite Buffer<\/p>\n<p>\u589e\u91cf\u9700\u8981\u989d\u5916\u7ef4\u62a4\u4e00\u4efd\u5185\u5b58\u7f13\u5b58\u3002<\/p>\n<p>Redis 7.0&#043;&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b<br \/>\n\u2192 \u65b0 Base<\/p>\n<p>\u7236\u8fdb\u7a0b<br \/>\n\u2192 \u76f4\u63a5\u5199\u65b0\u7684 incr.aof<\/p>\n<p>\u4e8e\u662f\u91cd\u5199\u671f\u95f4\u4ea7\u751f\u7684\u65b0\u53d8\u5316\u5df2\u7ecf\u76f4\u63a5\u6210\u4e3a\u65b0 AOF \u4f53\u7cfb\u4e2d\u7684\u589e\u91cf\u6587\u4ef6\u3002<\/p>\n<p>\u56e0\u6b64\u7ecf\u5178\u7684&#xff1a;<\/p>\n<p>AOF Rewrite Buffer<\/p>\n<p>\u4e0d\u518d\u662f\u8fd9\u5957 Multi-Part AOF \u7684\u6838\u5fc3\u673a\u5236\u3002<\/p>\n<hr \/>\n<h3>4. Redis 7.0&#043; \u7684\u5b8c\u6574 Rewrite \u5fc3\u667a\u6a21\u578b<\/h3>\n<p>\u89e6\u53d1 AOF Rewrite<br \/>\n        \u2193<br \/>\nfork &#064; t0<br \/>\n        \u2193<br \/>\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510<br \/>\n\u2502                    \u2502                    \u2502<br \/>\n\u2193                    \u2193<br \/>\n\u5b50\u8fdb\u7a0b               \u7236\u8fdb\u7a0b<br \/>\n\u2502                    \u2502<br \/>\n\u251c\u2192 \u904d\u5386 t0 \u6570\u636e       \u251c\u2192 \u7ee7\u7eed\u5904\u7406\u8bf7\u6c42<br \/>\n\u2502                    \u2502<br \/>\n\u2514\u2192 \u751f\u6210\u65b0 Base        \u2514\u2192 \u521b\u5efa\u65b0\u7684 incr.aof<br \/>\n                           \u2193<br \/>\n                        \u8bb0\u5f55 t0 \u540e\u53d8\u5316<br \/>\n        \u2502<br \/>\n        \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<br \/>\n                     \u2193<br \/>\n                Base \u751f\u6210\u6210\u529f<br \/>\n                     \u2193<br \/>\n               \u66f4\u65b0 Manifest<br \/>\n                     \u2193<br \/>\n       \u65b0 Base &#043; \u65b0 Incremental \u751f\u6548<\/p>\n<hr \/>\n<h2>\u5341\u4e94\u3001Manifest&#xff1a;AOF \u6587\u4ef6\u96c6\u5408\u7684\u201c\u76ee\u5f55\u201d<\/h2>\n<p>\u65e2\u7136 Redis 7.0&#043; \u53ef\u80fd\u5b58\u5728&#xff1a;<\/p>\n<p>Base<br \/>\n&#043;<br \/>\nincr1.aof<br \/>\n&#043;<br \/>\nincr2.aof<br \/>\n&#043;<br \/>\nincr3.aof<\/p>\n<p>\u90a3\u4e48 Redis \u542f\u52a8\u65f6\u5c31\u5fc5\u987b\u77e5\u9053&#xff1a;<\/p>\n<p>\u54ea\u4e2a Base \u662f\u5f53\u524d\u6709\u6548\u7684&#xff1f;<br \/>\n\u6709\u54ea\u4e9b Incremental&#xff1f;<br \/>\n\u8fd9\u4e9b Incremental \u7684\u987a\u5e8f\u662f\u4ec0\u4e48&#xff1f;<\/p>\n<p>\u4e8e\u662f\u5c31\u9700\u8981&#xff1a;<\/p>\n<p>Manifest<\/p>\n<p>Manifest \u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u5f53\u524d AOF \u6587\u4ef6\u96c6\u5408\u7684\u6e05\u5355\u3002<\/p>\n<p>\u5b83\u4e0d\u8d1f\u8d23\u4fdd\u5b58\u771f\u6b63\u7684\u4e1a\u52a1\u6570\u636e&#xff0c;\u800c\u662f\u63cf\u8ff0&#xff1a;<\/p>\n<p>\u5f53\u524d Base \u662f\u8c01<br \/>\n&#043;<br \/>\n\u5f53\u524d\u6709\u6548 Incremental \u6709\u54ea\u4e9b<br \/>\n&#043;<br \/>\n\u52a0\u8f7d\u987a\u5e8f\u662f\u4ec0\u4e48<\/p>\n<p>\u6240\u4ee5\u6062\u590d\u65f6&#xff1a;<\/p>\n<p>\u8bfb\u53d6 Manifest<br \/>\n\u2193<br \/>\n\u627e\u5230 Base<br \/>\n\u2193<br \/>\n\u52a0\u8f7d Base<br \/>\n\u2193<br \/>\n\u6309\u7167\u987a\u5e8f\u91cd\u653e Incremental<br \/>\n\u2193<br \/>\n\u6062\u590d\u5b8c\u6574\u72b6\u6001<\/p>\n<hr \/>\n<h3>1. \u4e3a\u4ec0\u4e48\u4e00\u4e2a Base \u540e\u9762\u53ef\u4ee5\u6709\u591a\u4e2a Incremental<\/h3>\n<p>\u4e00\u5957\u6709\u6548 AOF \u4e2d&#xff1a;<\/p>\n<p>Base<\/p>\n<p>\u901a\u5e38\u6700\u591a\u53ea\u6709\u4e00\u4e2a\u6709\u6548\u57fa\u51c6\u3002<\/p>\n<p>\u4f46\u662f&#xff1a;<\/p>\n<p>Incremental<\/p>\n<p>\u53ef\u80fd\u5b58\u5728\u591a\u4e2a\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u65e7 Base<br \/>\n&#043;<br \/>\nincr1<\/p>\n<p>\u968f\u540e\u53c8\u53d1\u8d77\u4e00\u6b21 Rewrite&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b\u65b0\u5efa incr2<\/p>\n<p>\u4f46\u662f\u8fd9\u6b21 Rewrite \u5931\u8d25\u4e86\u3002<\/p>\n<p>\u65b0\u7684 Base \u6ca1\u6709\u751f\u6210\u6210\u529f&#xff0c;\u4f46\u662f&#xff1a;<\/p>\n<p>incr2<\/p>\n<p>\u91cc\u9762\u5df2\u7ecf\u4fdd\u5b58\u4e86\u91cd\u5199\u671f\u95f4\u4ea7\u751f\u7684\u65b0\u53d8\u5316\u3002<\/p>\n<p>\u90a3\u4e48\u4e3a\u4e86\u4fdd\u6301\u5b8c\u6574\u6062\u590d\u80fd\u529b&#xff1a;<\/p>\n<p>\u65e7 Base<br \/>\n&#043;<br \/>\nincr1<br \/>\n&#043;<br \/>\nincr2<\/p>\n<p>\u4f9d\u7136\u662f\u4e00\u5957\u6709\u6548\u94fe\u8def\u3002<\/p>\n<p>\u6240\u4ee5\u4e0d\u80fd\u7b80\u5355\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u4e00\u4e2a Base<br \/>\n\u53ea\u80fd\u914d\u4e00\u4e2a incr<\/p>\n<p>\u66f4\u51c6\u786e\u662f&#xff1a;<\/p>\n<p>1 \u4e2a Base<br \/>\n&#043;<br \/>\n0 ~ N \u4e2a Incremental AOF<\/p>\n<hr \/>\n<h2>\u5341\u516d\u3001Redis 7.0&#043; \u7684\u6062\u590d\u8fc7\u7a0b<\/h2>\n<p>\u5982\u679c Base \u4f7f\u7528 RDB \u683c\u5f0f&#xff1a;<\/p>\n<p>Base RDB<br \/>\n\u2193<br \/>\n\u5feb\u901f\u6062\u590d\u5230 t0 \u65f6\u523b\u7684\u6570\u636e\u72b6\u6001<\/p>\n<p>\u7136\u540e&#xff1a;<\/p>\n<p>Incremental AOF<br \/>\n\u2193<br \/>\n\u89e3\u6790 RESP<br \/>\n\u2193<br \/>\n\u5f97\u5230\u547d\u4ee4<br \/>\n\u2193<br \/>\n\u4f9d\u6b21\u91cd\u653e<\/p>\n<p>\u6700\u7ec8&#xff1a;<\/p>\n<p>\u5f53\u524d\u5185\u5b58\u72b6\u6001<br \/>\n&#061;<br \/>\nBase \u57fa\u51c6\u72b6\u6001<br \/>\n&#043;<br \/>\nBase \u4e4b\u540e\u7684\u589e\u91cf\u53d8\u5316<\/p>\n<p>\u8fd9\u5c31\u662f Redis 7.0&#043; AOF \u975e\u5e38\u6e05\u6670\u7684\u4e00\u6761\u6062\u590d\u94fe\u8def\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\u8fd9\u91cc\u7684 Base \u867d\u7136\u4f7f\u7528 RDB \u683c\u5f0f&#xff0c;\u4f46\u5b83\u4ecd\u7136\u5c5e\u4e8e AOF \u4f53\u7cfb\u4e2d\u7684 Base \u6587\u4ef6\u3002<\/p>\n<p>\u5b83\u548c Redis \u72ec\u7acb\u7684&#xff1a;<\/p>\n<p>dump.rdb<\/p>\n<p>\u4e0d\u662f\u540c\u4e00\u4e2a\u6982\u5ff5\u3002<\/p>\n<hr \/>\n<h2>\u5341\u4e03\u3001AOF Rewrite \u7684\u81ea\u52a8\u89e6\u53d1<\/h2>\n<p>\u9664\u4e86&#xff1a;<\/p>\n<p>BGREWRITEAOF<\/p>\n<p>\u624b\u52a8\u89e6\u53d1\u4ee5\u5916&#xff0c;Redis \u8fd8\u53ef\u4ee5\u81ea\u52a8\u5224\u65ad AOF \u662f\u5426\u5df2\u7ecf\u81a8\u80c0\u5230\u503c\u5f97 Rewrite\u3002<\/p>\n<p>\u6838\u5fc3\u914d\u7f6e&#xff1a;<\/p>\n<p>auto-aof-rewrite-percentage 100<br \/>\nauto-aof-rewrite-min-size 64mb<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094107-6a9e86b374299.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h3>1. auto-aof-rewrite-min-size<\/h3>\n<p>\u5b83\u8868\u793a&#xff1a;<\/p>\n<p>\u5f53\u524d AOF \u81f3\u5c11\u8fbe\u5230\u4e00\u5b9a\u89c4\u6a21&#xff0c;\u624d\u8003\u8651\u81ea\u52a8 Rewrite\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>auto-aof-rewrite-min-size 64mb<\/p>\n<p>\u610f\u5473\u7740\u5982\u679c AOF \u8fd8\u975e\u5e38\u5c0f&#xff0c;\u5373\u4f7f\u589e\u957f\u6bd4\u4f8b\u5df2\u7ecf\u5f88\u5927&#xff0c;\u4e5f\u6ca1\u6709\u5fc5\u8981\u9891\u7e41 Rewrite\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>1MB \u2192 2MB<\/p>\n<p>\u867d\u7136\u589e\u957f&#xff1a;<\/p>\n<p>100%<\/p>\n<p>\u4f46\u6587\u4ef6\u672c\u8eab\u5f88\u5c0f&#xff0c;\u4e3a\u6b64 fork \u4e00\u4e2a\u91cd\u5199\u5b50\u8fdb\u7a0b\u663e\u7136\u610f\u4e49\u4e0d\u5927\u3002<\/p>\n<p>\u6240\u4ee5\u6700\u5c0f\u5927\u5c0f\u8d1f\u8d23\u8fc7\u6ee4&#xff1a;<\/p>\n<p>\u6587\u4ef6\u867d\u7136\u589e\u957f\u6bd4\u4f8b\u5927&#xff0c;\u4f46\u7edd\u5bf9\u89c4\u6a21\u4ecd\u7136\u5f88\u5c0f\u3002<\/p>\n<hr \/>\n<h3>2. auto-aof-rewrite-percentage<\/h3>\n<p>Redis \u4f1a\u8bb0\u5f55&#xff1a;<\/p>\n<p>\u4e0a\u4e00\u6b21 Rewrite \u5b8c\u6210\u540e\u7684 AOF \u57fa\u51c6\u5927\u5c0f<\/p>\n<p>\u518d\u548c&#xff1a;<\/p>\n<p>\u5f53\u524d AOF \u5927\u5c0f<\/p>\n<p>\u6bd4\u8f83\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u4e0a\u4e00\u6b21 Rewrite \u540e<br \/>\nAOF &#061; 100MB<\/p>\n<p>\u914d\u7f6e&#xff1a;<\/p>\n<p>auto-aof-rewrite-percentage 100<\/p>\n<p>\u90a3\u4e48&#xff1a;<\/p>\n<p>\u5f53\u524d AOF \u2248 200MB<\/p>\n<p>\u65f6&#xff0c;\u76f8\u6bd4\u4e0a\u4e00\u6b21 Rewrite \u540e\u7684\u5927\u5c0f\u589e\u957f\u4e86\u7ea6&#xff1a;<\/p>\n<p>100%<\/p>\n<p>\u4e8e\u662f\u6ee1\u8db3\u589e\u957f\u6bd4\u4f8b\u6761\u4ef6\u3002<\/p>\n<p>\u6240\u4ee5\u81ea\u52a8 Rewrite \u53ef\u4ee5\u7b80\u5355\u7406\u89e3\u6210\u4e24\u4e2a\u95e8\u69db&#xff1a;<\/p>\n<p>\u5f53\u524d AOF \u5927\u5c0f &gt;&#061; \u6700\u5c0f\u9608\u503c<br \/>\n        &amp;&amp;<br \/>\n\u5f53\u524d AOF \u76f8\u6bd4\u4e0a\u6b21 Rewrite \u540e<br \/>\n\u589e\u957f\u6bd4\u4f8b &gt;&#061; \u914d\u7f6e\u767e\u5206\u6bd4<\/p>\n<p>\u6ee1\u8db3\u4ee5\u540e&#xff1a;<\/p>\n<p>\u81ea\u52a8\u89e6\u53d1 BGREWRITEAOF \u5bf9\u5e94\u7684\u540e\u53f0 Rewrite \u6d41\u7a0b<\/p>\n<p>\u5982\u679c&#xff1a;<\/p>\n<p>auto-aof-rewrite-percentage 0<\/p>\n<p>\u5219\u53ef\u4ee5\u5173\u95ed\u81ea\u52a8 AOF Rewrite\u3002<\/p>\n<hr \/>\n<h2>\u5341\u516b\u3001AOF \u5176\u4ed6\u51e0\u4e2a\u91cd\u8981\u914d\u7f6e\u9879<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094108-6a9e86b4432b8.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<h3>1. aof-load-truncated<\/h3>\n<p>\u914d\u7f6e&#xff1a;<\/p>\n<p>aof-load-truncated yes<\/p>\n<p>\u63a7\u5236&#xff1a;<\/p>\n<p>Redis \u542f\u52a8\u52a0\u8f7d AOF \u65f6&#xff0c;\u5982\u679c\u53d1\u73b0\u6587\u4ef6\u5c3e\u90e8\u56e0\u4e3a\u5f02\u5e38\u4e2d\u65ad\u800c\u6ca1\u6709\u5199\u5b8c\u6574&#xff0c;\u8be5\u600e\u4e48\u529e\u3002<\/p>\n<p>\u4f8b\u5982\u539f\u672c\u5e94\u8be5&#xff1a;<\/p>\n<p>SET a 1<br \/>\nSET b 2<br \/>\nSET c 3<\/p>\n<p>\u4f46\u662f\u6700\u540e\u4e00\u6b21\u5199\u5165\u65f6\u673a\u5668\u5b95\u673a&#xff1a;<\/p>\n<p>SET a 1<br \/>\nSET b 2<br \/>\nSET c &#8230;<\/p>\n<p>\u5c3e\u90e8\u51fa\u73b0\u622a\u65ad\u3002<\/p>\n<p>\u5982\u679c&#xff1a;<\/p>\n<p>aof-load-truncated yes<\/p>\n<p>Redis \u4f1a&#xff1a;<\/p>\n<p>\u5c3d\u53ef\u80fd\u52a0\u8f7d\u524d\u9762\u5b8c\u6574\u7684 AOF<br \/>\n&#043;<br \/>\n\u8bb0\u5f55\u76f8\u5173\u65e5\u5fd7<br \/>\n&#043;<br \/>\n\u7ee7\u7eed\u542f\u52a8<\/p>\n<p>\u5982\u679c&#xff1a;<\/p>\n<p>aof-load-truncated no<\/p>\n<p>Redis \u4f1a&#xff1a;<\/p>\n<p>\u53d1\u73b0\u5c3e\u90e8\u622a\u65ad<br \/>\n\u2193<br \/>\n\u62d2\u7edd\u542f\u52a8<br \/>\n\u2193<br \/>\n\u9700\u8981\u4eba\u5de5\u68c0\u67e5 \/ \u4fee\u590d AOF<\/p>\n<p>\u9700\u8981\u6ce8\u610f&#xff1a;<\/p>\n<p>\u8fd9\u4e2a\u9009\u9879\u4e3b\u8981\u9488\u5bf9\u6587\u4ef6\u5c3e\u90e8\u622a\u65ad&#xff0c;\u4e0d\u4ee3\u8868 AOF \u4e2d\u95f4\u4efb\u610f\u4f4d\u7f6e\u635f\u574f\u90fd\u53ef\u4ee5\u5ffd\u7565\u3002<\/p>\n<p>\u5982\u679c AOF \u4e2d\u95f4\u53d1\u751f\u7ed3\u6784\u6027\u635f\u574f&#xff0c;Redis \u4ecd\u53ef\u80fd\u62d2\u7edd\u542f\u52a8\u3002<\/p>\n<hr \/>\n<h3>2. aof-use-rdb-preamble<\/h3>\n<p>\u914d\u7f6e&#xff1a;<\/p>\n<p>aof-use-rdb-preamble yes<\/p>\n<p>\u8868\u793a&#xff1a;<\/p>\n<p>AOF Rewrite \u751f\u6210 Base \u65f6&#xff0c;\u53ef\u4ee5\u4f7f\u7528 RDB \u683c\u5f0f\u4fdd\u5b58\u57fa\u51c6\u72b6\u6001\u3002<\/p>\n<p>\u8fd9\u6b63\u597d\u5bf9\u5e94\u524d\u9762 Redis 7.0&#043; \u7684&#xff1a;<\/p>\n<p>Base RDB<br \/>\n&#043;<br \/>\nIncremental AOF<\/p>\n<p>RDB \u4f5c\u4e3a Base \u7684\u4f18\u52bf&#xff1a;<\/p>\n<p>\u7d27\u51d1<br \/>\n\u52a0\u8f7d\u5feb<br \/>\n\u975e\u5e38\u9002\u5408\u63cf\u8ff0\u5b8c\u6574\u57fa\u51c6\u72b6\u6001<\/p>\n<p>\u5982\u679c\u914d\u7f6e\u4e3a&#xff1a;<\/p>\n<p>no<\/p>\n<p>\u5219 Base \u53ef\u4ee5\u7ee7\u7eed\u91c7\u7528 AOF \u547d\u4ee4\u5f62\u5f0f&#xff0c;\u4e3b\u8981\u7528\u4e8e\u517c\u5bb9\u573a\u666f\u3002<\/p>\n<hr \/>\n<h3>3. aof-timestamp-enabled<\/h3>\n<p>\u914d\u7f6e&#xff1a;<\/p>\n<p>aof-timestamp-enabled no<\/p>\n<p>\u8868\u793a\u9ed8\u8ba4\u4e0d\u5728 AOF \u4e2d\u5f00\u542f\u65f6\u95f4\u6233\u6ce8\u89e3\u3002<\/p>\n<p>\u5982\u679c\u5f00\u542f&#xff1a;<\/p>\n<p>aof-timestamp-enabled yes<\/p>\n<p>AOF \u4f1a\u8bb0\u5f55\u989d\u5916\u7684\u65f6\u95f4\u4fe1\u606f&#xff0c;\u4ece\u800c\u5e2e\u52a9\u652f\u6301&#xff1a;<\/p>\n<p>Point-In-Time Restore<\/p>\n<p>\u4e5f\u5c31\u662f&#xff1a;<\/p>\n<p>\u6309\u6307\u5b9a\u65f6\u95f4\u70b9\u6062\u590d\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>\u6211\u4e0d\u60f3\u6062\u590d\u5230\u6700\u65b0\u72b6\u6001<br \/>\n\u800c\u662f\u60f3\u6062\u590d\u5230 10:30 \u5de6\u53f3<\/p>\n<p>\u65f6\u95f4\u6233\u53ef\u4ee5\u5e2e\u52a9\u6062\u590d\u5de5\u5177\u5224\u65ad&#xff1a;<\/p>\n<p>\u54ea\u4e9b AOF \u64cd\u4f5c\u4f4d\u4e8e\u8be5\u65f6\u95f4\u70b9\u4e4b\u524d<br \/>\n\u54ea\u4e9b\u4f4d\u4e8e\u8be5\u65f6\u95f4\u70b9\u4e4b\u540e<\/p>\n<p>\u4ee3\u4ef7\u662f&#xff1a;<\/p>\n<p>AOF \u683c\u5f0f\u53d1\u751f\u6269\u5c55<br \/>\n&#043;<br \/>\n\u90e8\u5206\u65e7\u89e3\u6790\u5668 \/ \u7b2c\u4e09\u65b9\u5de5\u5177\u53ef\u80fd\u4e0d\u517c\u5bb9<\/p>\n<p>\u6240\u4ee5\u9ed8\u8ba4\u901a\u5e38\u4fdd\u6301&#xff1a;<\/p>\n<p>no<\/p>\n<hr \/>\n<h2>\u5341\u4e5d\u3001RDB \u548c AOF \u53ef\u4ee5\u540c\u65f6\u5f00\u542f\u5417<\/h2>\n<p>\u53ef\u4ee5\u3002<\/p>\n<p>\u8fd9\u91cc\u4e00\u5b9a\u4e0d\u8981\u5efa\u7acb&#xff1a;<\/p>\n<p>\u5f00\u542f RDB<br \/>\n\u2192 \u5c31\u4e0d\u80fd\u5f00\u542f AOF<\/p>\n<p>\u6216\u8005&#xff1a;<\/p>\n<p>\u5f00\u542f AOF<br \/>\n\u2192 RDB \u5c31\u505c\u6b62<\/p>\n<p>\u8fd9\u79cd\u4e8c\u9009\u4e00\u8ba4\u77e5\u3002<\/p>\n<p>Redis \u53ef\u4ee5\u540c\u65f6\u7ef4\u62a4&#xff1a;<\/p>\n<p>RDB<br \/>\n&#043;<br \/>\nAOF<\/p>\n<p>\u4e24\u5957\u72ec\u7acb\u6301\u4e45\u5316\u4f53\u7cfb\u3002<\/p>\n<p>\u6b63\u5e38\u8fd0\u884c\u65f6&#xff1a;<\/p>\n<p>Redis \u5185\u5b58<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 RDB<br \/>\n\u2502   \u2514\u2192 \u6ee1\u8db3 save \u6761\u4ef6\u65f6\u751f\u6210\u5feb\u7167<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 AOF<br \/>\n    \u2514\u2192 \u6301\u7eed\u8bb0\u5f55\u5199\u64cd\u4f5c\u5e76\u6309\u7167\u7b56\u7565\u6301\u4e45\u5316<\/p>\n<hr \/>\n<h3>1. \u4e24\u8005\u540c\u65f6\u5f00\u542f\u65f6&#xff0c;\u6062\u590d\u4f18\u5148\u8c01<\/h3>\n<p>\u6b63\u5e38\u60c5\u51b5\u4e0b&#xff1a;<\/p>\n<p>RDB &#043; AOF \u90fd\u5f00\u542f<\/p>\n<p>Redis \u542f\u52a8\u4f1a\u4f18\u5148\u4f7f\u7528&#xff1a;<\/p>\n<p>AOF<\/p>\n<p>\u6765\u6062\u590d\u6570\u636e\u5e93\u3002<\/p>\n<p>\u539f\u56e0\u975e\u5e38\u76f4\u63a5&#xff1a;<\/p>\n<p>AOF \u901a\u5e38\u62e5\u6709\u66f4\u7ec6\u7684\u8bb0\u5f55\u7c92\u5ea6&#xff0c;\u80fd\u591f\u6062\u590d\u5230\u6bd4\u5468\u671f\u6027 RDB \u5feb\u7167\u66f4\u65b0\u7684\u72b6\u6001\u3002<\/p>\n<p>\u6240\u4ee5\u4e0d\u8981\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u5148\u7528 RDB \u6062\u590d<br \/>\n&#043;<br \/>\n\u518d\u628a\u72ec\u7acb AOF \u5168\u90e8\u7ee7\u7eed\u91cd\u653e<\/p>\n<p>\u8fd9\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u6301\u4e45\u5316\u4f53\u7cfb\u3002<\/p>\n<hr \/>\n<h3>2. \u90a3\u540c\u65f6\u5f00\u542f\u4ee5\u540e&#xff0c;RDB \u6709\u4ec0\u4e48\u4ef7\u503c<\/h3>\n<p>\u65e2\u7136\u6062\u590d\u4e3b\u8981\u4f9d\u8d56 AOF&#xff0c;\u90a3\u4e48 RDB \u4ecd\u7136\u53ef\u4ee5\u627f\u62c5&#xff1a;<\/p>\n<p>\u72ec\u7acb\u5feb\u7167<br \/>\n&#043;<br \/>\n\u5468\u671f\u6027\u5907\u4efd<br \/>\n&#043;<br \/>\n\u5f02\u5730\u5907\u4efd<br \/>\n&#043;<br \/>\n\u707e\u96be\u6062\u590d\u65f6\u7684\u91cd\u8981\u5907\u4efd\u526f\u672c<\/p>\n<p>\u6240\u4ee5\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>AOF \u4e3b\u8981\u627f\u62c5\u66f4\u7ec6\u7c92\u5ea6\u7684\u6301\u4e45\u5316\u6062\u590d&#xff0c;RDB \u4ecd\u7136\u662f\u4e00\u4efd\u975e\u5e38\u6709\u4ef7\u503c\u7684\u72ec\u7acb\u72b6\u6001\u5907\u4efd\u3002<\/p>\n<p>\u4f46\u662f\u4e0d\u8981\u7b80\u5355\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>AOF \u4e00\u574f<br \/>\nRedis \u81ea\u52a8\u65e0\u6761\u4ef6\u5207\u6362 RDB<\/p>\n<p>\u201c\u72ec\u7acb\u5907\u4efd\u201d\u4e0e\u201c\u81ea\u52a8\u6545\u969c\u5207\u6362\u201d\u4e0d\u662f\u4e00\u56de\u4e8b\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u5341\u3001BGSAVE \u4e0e BGREWRITEAOF \u4e3a\u4ec0\u4e48\u4e0d\u4f1a\u540c\u65f6\u8dd1\u4e24\u4e2a\u91cd\u578b\u5b50\u8fdb\u7a0b<\/h2>\n<p>RDB \u7684\u540e\u53f0\u5feb\u7167&#xff1a;<\/p>\n<p>BGSAVE<\/p>\n<p>\u4ee5\u53ca AOF Rewrite&#xff1a;<\/p>\n<p>BGREWRITEAOF<\/p>\n<p>\u90fd\u4f1a\u6d89\u53ca&#xff1a;<\/p>\n<p>fork<br \/>\n&#043;<br \/>\n\u904d\u5386\u5927\u91cf\u5185\u5b58<br \/>\n&#043;<br \/>\n\u5927\u91cf\u78c1\u76d8\u5199\u5165<\/p>\n<p>\u5982\u679c\u4e24\u8005\u540c\u65f6 fork&#xff1a;<\/p>\n<p>RDB Child<br \/>\n&#043;<br \/>\nAOF Rewrite Child<\/p>\n<p>\u4f1a\u660e\u663e\u589e\u52a0&#xff1a;<\/p>\n<p>COW \u5185\u5b58\u538b\u529b<br \/>\n&#043;<br \/>\nCPU \u538b\u529b<br \/>\n&#043;<br \/>\n\u78c1\u76d8 IO \u7ade\u4e89<\/p>\n<p>\u6240\u4ee5 Redis \u4f1a\u907f\u514d\u4e24\u4e2a\u4e92\u65a5\u7684\u91cd\u578b\u540e\u53f0\u6301\u4e45\u5316\u5b50\u8fdb\u7a0b\u540c\u65f6\u8fd0\u884c\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<p>BGSAVE \u6b63\u5728\u6267\u884c<br \/>\n\u2193<br \/>\n\u6b64\u65f6\u89e6\u53d1 BGREWRITEAOF<br \/>\n\u2193<br \/>\nAOF Rewrite \u5ef6\u540e<br \/>\n\u2193<br \/>\n\u7b49\u5f85 BGSAVE \u7ed3\u675f<br \/>\n\u2193<br \/>\n\u518d\u6267\u884c Rewrite<\/p>\n<p>\u4f46\u662f\u6ce8\u610f&#xff1a;<\/p>\n<p>\u7b49\u5f85\u7684\u662f AOF Rewrite&#xff0c;\u800c\u4e0d\u662f\u6b63\u5e38 AOF \u8ffd\u52a0\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5728 BGSAVE \u671f\u95f4&#xff1a;<\/p>\n<p>AOF Buffer<br \/>\n\u2193<br \/>\nwrite<br \/>\n\u2193<br \/>\nPage Cache<br \/>\n\u2193<br \/>\n\u6309\u7167 appendfsync \u7b56\u7565\u5237\u76d8<\/p>\n<p>\u4ecd\u7136\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u5341\u4e00\u3001Redis 7.0&#043; \u4e2d\u201c\u4e24\u79cd RDB\u201d\u4e00\u5b9a\u4e0d\u8981\u6df7<\/h2>\n<p>\u5b66\u4e60\u5230 Redis 7.0&#043; \u540e&#xff0c;\u975e\u5e38\u5bb9\u6613\u770b\u5230&#xff1a;<\/p>\n<p>RDB<\/p>\n<p>\u8fd9\u4e2a\u8bcd\u51fa\u73b0\u4e24\u6b21&#xff0c;\u7136\u540e\u6df7\u4e3a\u4e00\u8c08\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\u6709\u4e24\u4e2a\u5b8c\u5168\u4e0d\u540c\u5c42\u6b21\u3002<\/p>\n<hr \/>\n<h3>1. \u72ec\u7acb\u7684 RDB \u6301\u4e45\u5316<\/h3>\n<p>Redis Persistence<br \/>\n\u2193<br \/>\nRDB<br \/>\n\u2193<br \/>\ndump.rdb<\/p>\n<p>\u8fd9\u662f&#xff1a;<\/p>\n<p>SAVE \/ BGSAVE \/ save condition<\/p>\n<p>\u5bf9\u5e94\u7684\u72ec\u7acb RDB \u6301\u4e45\u5316\u673a\u5236\u3002<\/p>\n<hr \/>\n<h3>2. AOF \u5185\u90e8\u7684 Base RDB<\/h3>\n<p>Redis 7.0&#043; \u7684 AOF&#xff1a;<\/p>\n<p>AOF<br \/>\n\u251c\u2500\u2500 Base<br \/>\n\u2502   \u2514\u2500\u2500 \u53ef\u4ee5\u4f7f\u7528 RDB \u683c\u5f0f<br \/>\n\u251c\u2500\u2500 Incremental AOF<br \/>\n\u2514\u2500\u2500 Manifest<\/p>\n<p>\u8fd9\u91cc\u7684&#xff1a;<\/p>\n<p>base.rdb<\/p>\n<p>\u867d\u7136\u4f7f\u7528 RDB \u4e8c\u8fdb\u5236\u683c\u5f0f&#xff0c;\u4f46\u5b83\u7684\u8eab\u4efd\u662f&#xff1a;<\/p>\n<p>AOF \u6587\u4ef6\u96c6\u5408\u4e2d\u7684 Base\u3002<\/p>\n<p>\u6240\u4ee5\u6700\u7ec8\u7ed3\u6784\u53ef\u4ee5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>Redis \u6301\u4e45\u5316<br \/>\n\u2502<br \/>\n\u251c\u2500\u2500 \u72ec\u7acb RDB<br \/>\n\u2502     \u2514\u2500\u2500 dump.rdb<br \/>\n\u2502<br \/>\n\u2514\u2500\u2500 AOF<br \/>\n      \u251c\u2500\u2500 Base<br \/>\n      \u2502     \u2514\u2500\u2500 \u53ef\u4ee5\u4f7f\u7528 RDB \u683c\u5f0f<br \/>\n      \u251c\u2500\u2500 Incremental AOF<br \/>\n      \u2514\u2500\u2500 Manifest<\/p>\n<p>\u8fd9\u4e24\u4e2a\u5c42\u6b21\u4e00\u5b9a\u4e0d\u8981\u6df7\u6dc6\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u5341\u4e8c\u3001\u6700\u7ec8\u628a\u6574\u5957\u6301\u4e45\u5316\u673a\u5236\u4e32\u8d77\u6765<\/h2>\n<p>\u5230\u8fd9\u91cc\u53ef\u4ee5\u628a\u6574\u4e2a Redis \u6301\u4e45\u5316\u538b\u7f29\u6210\u4e00\u6761\u5b8c\u6574\u903b\u8f91\u94fe\u3002<\/p>\n<p>Redis \u6570\u636e\u4e3b\u8981\u9a7b\u7559\u5185\u5b58<br \/>\n        \u2193<br \/>\n\u5185\u5b58\u6389\u7535\u4f1a\u4e22\u5931<br \/>\n        \u2193<br \/>\n\u9700\u8981\u6301\u4e45\u5316<br \/>\n        \u2193<br \/>\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br \/>\n        \u2193<br \/>\nRDB<br \/>\n        \u2193<br \/>\n\u5468\u671f\u6027\u4fdd\u5b58\u67d0\u4e00\u65f6\u523b\u5b8c\u6574\u72b6\u6001<br \/>\n        \u2193<br \/>\nSAVE \/ BGSAVE \/ \u81ea\u52a8 save<br \/>\n        \u2193<br \/>\nBGSAVE \u4f7f\u7528 fork &#043; COW<br \/>\n        \u2193<br \/>\n\u751f\u6210\u4e8c\u8fdb\u5236\u5feb\u7167<br \/>\n        \u2193<br \/>\n\u6062\u590d\u5feb\u3001\u6587\u4ef6\u7d27\u51d1<br \/>\n        \u2193<br \/>\n\u4f46\u662f\u5b58\u5728\u5feb\u7167\u95f4\u7684\u6570\u636e\u7a97\u53e3<br \/>\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br \/>\n        \u2193<br \/>\nAOF<br \/>\n        \u2193<br \/>\n\u6301\u7eed\u8bb0\u5f55\u5199\u64cd\u4f5c<br \/>\n        \u2193<br \/>\nRESP \u547d\u4ee4\u65e5\u5fd7<br \/>\n        \u2193<br \/>\nAOF Buffer<br \/>\n        \u2193<br \/>\n\u6279\u91cf write()<br \/>\n        \u2193<br \/>\nPage Cache<br \/>\n        \u2193<br \/>\n\u6309\u7167 appendfsync \u7b56\u7565 fsync<br \/>\n        \u2193<br \/>\n\u78c1\u76d8<br \/>\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br \/>\n        \u2193<br \/>\nAOF \u65e5\u5fd7\u4e0d\u65ad\u589e\u957f<br \/>\n        \u2193<br \/>\n\u6062\u590d\u547d\u4ee4\u8d8a\u6765\u8d8a\u591a<br \/>\n        \u2193<br \/>\n\u9700\u8981 AOF Rewrite<br \/>\n        \u2193<br \/>\n\u4e0d\u662f\u626b\u63cf\u65e7 AOF \u53bb\u91cd<br \/>\n        \u2193<br \/>\n\u6839\u636e\u5f53\u524d\u5185\u5b58\u72b6\u6001\u751f\u6210\u65b0\u7684\u6062\u590d\u57fa\u51c6<br \/>\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br \/>\n        \u2193<br \/>\nRedis &lt; 7.0<br \/>\n        \u2193<br \/>\n\u5b50\u8fdb\u7a0b\u751f\u6210\u4e34\u65f6\u65b0 AOF<br \/>\n\u7236\u8fdb\u7a0b\u7ee7\u7eed\u5199\u65e7 AOF &#043; Rewrite Buffer<br \/>\n        \u2193<br \/>\n\u5b50\u8fdb\u7a0b\u5b8c\u6210<br \/>\n        \u2193<br \/>\nRewrite Buffer \u8ffd\u52a0\u5230\u65b0 AOF<br \/>\n        \u2193<br \/>\nrename \u66ff\u6362<br \/>\n\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500<br \/>\n        \u2193<br \/>\nRedis &gt;&#061; 7.0<br \/>\n        \u2193<br \/>\nMulti-Part AOF<br \/>\n        \u2193<br \/>\nBase &#043; Incremental AOF &#043; Manifest<br \/>\n        \u2193<br \/>\nBase \u53ef\u91c7\u7528 RDB \u683c\u5f0f<br \/>\n        \u2193<br \/>\n\u7236\u8fdb\u7a0b\u76f4\u63a5\u521b\u5efa\u65b0\u7684 Incremental AOF<br \/>\n        \u2193<br \/>\n\u91cd\u5199\u6210\u529f\u540e\u5207\u6362\u65b0\u7684 AOF \u6587\u4ef6\u96c6\u5408<\/p>\n<hr \/>\n<h2>\u4e8c\u5341\u4e09\u3001RDB \u4e0e AOF \u7684\u6700\u7ec8\u5bf9\u6bd4<\/h2>\n<table>\n<tr>\u7ef4\u5ea6RDBAOF<\/tr>\n<tbody>\n<tr>\n<td>\u6838\u5fc3\u601d\u60f3<\/td>\n<td>\u4fdd\u5b58\u67d0\u4e00\u65f6\u523b\u72b6\u6001<\/td>\n<td>\u6301\u7eed\u8bb0\u5f55\u5199\u64cd\u4f5c<\/td>\n<\/tr>\n<tr>\n<td>\u8bb0\u5f55\u7c92\u5ea6<\/td>\n<td>\u5feb\u7167\u7ea7<\/td>\n<td>\u5199\u64cd\u4f5c\u7ea7<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u4ef6\u5f62\u5f0f<\/td>\n<td>RDB \u4e8c\u8fdb\u5236<\/td>\n<td>RESP\/AOF \u65e5\u5fd7&#xff1b;Redis 7&#043; Base \u53ef\u4e3a RDB<\/td>\n<\/tr>\n<tr>\n<td>\u6062\u590d\u65b9\u5f0f<\/td>\n<td>\u8bfb\u53d6\u5feb\u7167\u91cd\u5efa\u72b6\u6001<\/td>\n<td>\u52a0\u8f7d Base &#043; \u91cd\u653e\u589e\u91cf\u547d\u4ee4<\/td>\n<\/tr>\n<tr>\n<td>\u6062\u590d\u901f\u5ea6<\/td>\n<td>\u901a\u5e38\u66f4\u5feb<\/td>\n<td>\u4f20\u7edf\u7eaf AOF \u91cd\u653e\u8f83\u6162<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u4ef6\u4f53\u79ef<\/td>\n<td>\u901a\u5e38\u66f4\u7d27\u51d1<\/td>\n<td>\u957f\u671f\u8ffd\u52a0\u5bb9\u6613\u81a8\u80c0<\/td>\n<\/tr>\n<tr>\n<td>\u6570\u636e\u7a97\u53e3<\/td>\n<td>\u901a\u5e38\u66f4\u5927<\/td>\n<td>\u53d6\u51b3\u4e8e appendfsync \u7b56\u7565<\/td>\n<\/tr>\n<tr>\n<td>\u540e\u53f0\u4f18\u5316<\/td>\n<td>BGSAVE &#043; fork &#043; COW<\/td>\n<td>BGREWRITEAOF &#043; fork &#043; COW<\/td>\n<\/tr>\n<tr>\n<td>\u4e3b\u8981\u95ee\u9898<\/td>\n<td>\u5feb\u7167\u4e4b\u95f4\u53ef\u80fd\u4e22\u6570\u636e<\/td>\n<td>\u6587\u4ef6\u4e0d\u65ad\u81a8\u80c0&#xff0c;\u9700\u8981 Rewrite<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>\u4e8c\u5341\u56db\u3001\u6700\u540e\u5efa\u7acb\u51e0\u4e2a\u6700\u91cd\u8981\u7684\u8ba4\u77e5<\/h2>\n<h4>\u8ba4\u77e5\u4e00&#xff1a;Redis \u6301\u4e45\u5316\u4e0d\u662f\u56e0\u4e3a Redis \u53ea\u80fd\u505a\u7f13\u5b58<\/h4>\n<p>Redis<br \/>\n\u2260<br \/>\nMySQL \u524d\u9762\u7684\u4e34\u65f6\u7f13\u5b58\u5c42<\/p>\n<p>Redis<br \/>\n\u4e5f\u53ef\u4ee5\u627f\u62c5\u91cd\u8981\u6570\u636e\u5b58\u50a8<\/p>\n<p>\u6240\u4ee5\u6301\u4e45\u5316\u672c\u8eab\u662f Redis \u975e\u5e38\u6838\u5fc3\u7684\u80fd\u529b\u3002<\/p>\n<hr \/>\n<h4>\u8ba4\u77e5\u4e8c&#xff1a;RDB \u548c AOF \u7684\u6839\u672c\u533a\u522b\u4e0d\u662f\u201c\u4e00\u4e2a\u4e8c\u8fdb\u5236&#xff0c;\u4e00\u4e2a\u6587\u672c\u201d<\/h4>\n<p>\u66f4\u52a0\u672c\u8d28\u7684\u662f&#xff1a;<\/p>\n<p>RDB<br \/>\n\u2192 \u4fdd\u5b58\u72b6\u6001<\/p>\n<p>AOF<br \/>\n\u2192 \u4fdd\u5b58\u53d8\u5316<\/p>\n<p>\u6587\u4ef6\u683c\u5f0f\u53ea\u662f\u8fd9\u79cd\u8bbe\u8ba1\u601d\u60f3\u6700\u7ec8\u843d\u5730\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<hr \/>\n<h4>\u8ba4\u77e5\u4e09&#xff1a;AOF \u7684\u5b9e\u65f6\u6027\u4e0d\u7b49\u4e8e\u6bcf\u6761\u547d\u4ee4\u90fd\u540c\u6b65\u78c1\u76d8 IO<\/h4>\n<p>\u771f\u6b63\u7684\u94fe\u8def&#xff1a;<\/p>\n<p>\u5199\u547d\u4ee4<br \/>\n\u2193<br \/>\nAOF Buffer<br \/>\n\u2193<br \/>\nwrite()<br \/>\n\u2193<br \/>\nPage Cache<br \/>\n\u2193<br \/>\nfsync()<br \/>\n\u2193<br \/>\n\u78c1\u76d8<\/p>\n<p>\u6240\u4ee5&#xff1a;<\/p>\n<p>\u6bcf\u6761\u547d\u4ee4\u90fd\u8bb0\u5f55<br \/>\n\u2260<br \/>\n\u6bcf\u6761\u547d\u4ee4\u4e00\u6b21 write<br \/>\n\u2260<br \/>\n\u6bcf\u6761\u547d\u4ee4\u4e00\u6b21 fsync<\/p>\n<hr \/>\n<h4>\u8ba4\u77e5\u56db&#xff1a;AOF \u7684\u6838\u5fc3\u6027\u80fd\u6743\u8861\u5728 fsync<\/h4>\n<p>fsync \u8d8a\u9891\u7e41<br \/>\n\u2192 \u6570\u636e\u5b89\u5168\u6027\u8d8a\u9ad8<br \/>\n\u2192 \u78c1\u76d8\u540c\u6b65\u6210\u672c\u8d8a\u9ad8<\/p>\n<p>fsync \u8d8a\u5c11<br \/>\n\u2192 \u6027\u80fd\u8d8a\u597d<br \/>\n\u2192 \u6570\u636e\u4e22\u5931\u7a97\u53e3\u8d8a\u5927<\/p>\n<p>\u6240\u4ee5\u624d\u6709&#xff1a;<\/p>\n<p>always<br \/>\neverysec<br \/>\nno<\/p>\n<p>\u4e09\u79cd\u7b56\u7565\u3002<\/p>\n<hr \/>\n<h4>\u8ba4\u77e5\u4e94&#xff1a;AOF Rewrite \u4e0d\u662f\u65e7\u65e5\u5fd7\u53bb\u91cd<\/h4>\n<p>\u9519\u8bef\u7406\u89e3&#xff1a;<br \/>\n\u626b\u63cf\u65e7 AOF<br \/>\n\u2192 \u89e3\u6790<br \/>\n\u2192 \u5224\u65ad\u5197\u4f59<br \/>\n\u2192 \u5220\u9664<\/p>\n<p>\u6b63\u786e\u7406\u89e3&#xff1a;<br \/>\n\u76f4\u63a5\u770b\u5f53\u524d\u6570\u636e\u5e93\u72b6\u6001<br \/>\n\u2192 \u91cd\u65b0\u751f\u6210\u80fd\u591f\u6062\u590d\u5f53\u524d\u72b6\u6001\u7684\u57fa\u51c6<\/p>\n<hr \/>\n<h4>\u8ba4\u77e5\u516d&#xff1a;Redis 7.0&#043; \u628a\u201c\u57fa\u51c6\u201d\u548c\u201c\u589e\u91cf\u201d\u771f\u6b63\u62c6\u6210\u4e86\u4e0d\u540c\u6587\u4ef6<\/h4>\n<p>Base<br \/>\n\u2192 \u5b8c\u6574\u57fa\u51c6<\/p>\n<p>Incremental AOF<br \/>\n\u2192 \u57fa\u51c6\u540e\u7684\u53d8\u5316<\/p>\n<p>Manifest<br \/>\n\u2192 \u63cf\u8ff0\u5f53\u524d\u6709\u6548\u6587\u4ef6\u96c6\u5408<\/p>\n<p>\u5f53 Base \u4f7f\u7528 RDB \u683c\u5f0f\u4ee5\u540e&#xff1a;<\/p>\n<p>RDB \u7684\u7d27\u51d1\u3001\u5feb\u901f\u6062\u590d<br \/>\n&#043;<br \/>\nAOF \u7684\u7ec6\u7c92\u5ea6\u589e\u91cf\u8bb0\u5f55<\/p>\n<p>\u88ab\u7ec4\u5408\u5230\u4e86 AOF \u81ea\u5df1\u7684\u4f53\u7cfb\u5185\u90e8\u3002<\/p>\n<hr \/>\n<h3>\u603b\u7ed3<\/h3>\n<p>Redis \u7684\u4e24\u79cd\u6301\u4e45\u5316\u673a\u5236\u770b\u8d77\u6765\u5b9e\u73b0\u65b9\u5f0f\u4e0d\u540c&#xff0c;\u4f46\u662f\u4ece\u66f4\u9ad8\u5c42\u6b21\u6765\u770b&#xff0c;\u5b83\u4eec\u5b9e\u9645\u4e0a\u4e00\u76f4\u5728\u89e3\u51b3\u540c\u4e00\u4e2a\u95ee\u9898&#xff1a;<\/p>\n<p>\u5982\u4f55\u5728\u6027\u80fd\u3001\u6062\u590d\u901f\u5ea6\u4ee5\u53ca\u6570\u636e\u53ef\u9760\u6027\u4e4b\u95f4\u505a\u6743\u8861\u3002<\/p>\n<p>RDB \u9009\u62e9&#xff1a;<\/p>\n<p>\u5468\u671f\u6027\u4fdd\u5b58\u5b8c\u6574\u72b6\u6001<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>\u6062\u590d\u5feb<br \/>\n&#043;<br \/>\n\u6301\u4e45\u5316\u5f00\u9500\u76f8\u5bf9\u96c6\u4e2d<br \/>\n&#043;<br \/>\n\u5b58\u5728\u8f83\u5927\u7684\u6570\u636e\u65f6\u95f4\u7a97\u53e3<\/p>\n<p>AOF \u9009\u62e9&#xff1a;<\/p>\n<p>\u6301\u7eed\u8bb0\u5f55\u589e\u91cf\u53d8\u5316<\/p>\n<p>\u56e0\u6b64&#xff1a;<\/p>\n<p>\u6570\u636e\u7a97\u53e3\u66f4\u5c0f<br \/>\n&#043;<br \/>\n\u9700\u8981\u5904\u7406 write \/ fsync \u6027\u80fd\u95ee\u9898<br \/>\n&#043;<br \/>\n\u9700\u8981\u901a\u8fc7 Rewrite \u63a7\u5236\u65e5\u5fd7\u81a8\u80c0<\/p>\n<p>\u800c Redis 7.0&#043; \u7684 Multi-Part AOF \u53c8\u8fdb\u4e00\u6b65\u8bf4\u660e&#xff1a;<\/p>\n<p>\u201c\u5feb\u7167\u201d\u548c\u201c\u589e\u91cf\u65e5\u5fd7\u201d\u5e76\u4e0d\u662f\u4e92\u65a5\u601d\u60f3&#xff0c;\u771f\u6b63\u4f18\u79c0\u7684\u5b58\u50a8\u7cfb\u7edf\u5f80\u5f80\u4f1a\u628a\u4e24\u8005\u7ec4\u5408\u8d77\u6765&#xff1a;\u7528\u4e00\u4e2a\u5b8c\u6574\u57fa\u51c6\u89e3\u51b3\u5386\u53f2\u8fc7\u957f\u7684\u95ee\u9898&#xff0c;\u518d\u7528\u589e\u91cf\u65e5\u5fd7\u89e3\u51b3\u57fa\u51c6\u4e4b\u95f4\u7684\u6570\u636e\u5b9e\u65f6\u6027\u95ee\u9898\u3002<\/p>\n<p>\u8fd9\u4e5f\u5c31\u662f\u6211\u4eec\u5728\u5176\u4ed6\u6570\u636e\u5e93\u3001\u6587\u4ef6\u7cfb\u7edf\u4ee5\u53ca\u5b58\u50a8\u7cfb\u7edf\u4e2d\u7ecf\u5e38\u770b\u5230\u7684&#xff1a;<\/p>\n<p>Checkpoint<br \/>\n&#043;<br \/>\nIncremental Log<\/p>\n<p>\u8fd9\u4e00\u7c7b\u8bbe\u8ba1\u601d\u60f3\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260907094108-6a9e86b4b795f.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#x1f525; 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