{"id":201201,"date":"2025-05-10T09:03:44","date_gmt":"2025-05-10T01:03:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201201\/"},"modified":"2025-05-10T09:03:44","modified_gmt":"2025-05-10T01:03:44","slug":"redis%e6%95%b0%e6%8d%ae%e6%8c%81%e4%b9%85%e5%8c%96%e6%96%b9%e5%bc%8f%e6%8a%80%e6%9c%af%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201201\/","title":{"rendered":"Redis\u6570\u636e\u6301\u4e45\u5316\u65b9\u5f0f\u6280\u672f\u89e3\u6790"},"content":{"rendered":"

<\/b> <\/p>\n

Redis\u6570\u636e\u6301\u4e45\u5316\u65b9\u5f0f\u6280\u672f\u89e3\u6790<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300aRedis\u6570\u636e\u6301\u4e45\u5316\u65b9\u5f0f\u6280\u672f\u89e3\u6790\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u6301\u4e45\u5316\u3001redis\u6570\u636e\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n

RDB\uff08Redis DataBases\uff09<\/h2>\n

1\u3001RDB\u662f\u4ec0\u4e48\uff1a
\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u5c06\u5185\u5b58\u4e2d\u7684\u6570\u636e\u96c6\u5feb\u7167\u5199\u5165\u78c1\u76d8\uff0c\u4e5f\u5c31\u662fSnapshot\u5feb\u7167\uff0c\u5b83\u6062\u590d\u65f6\u662f\u5c06\u5feb\u7167\u6587\u4ef6\u76f4\u63a5\u8bfb\u5230\u5185\u5b58\u91cc\u3002
Redis\u4f1a\u5355\u72ec\u521b\u5efa\uff08fork\uff09\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u6765\u8fdb\u884c\u6301\u4e45\u5316\uff0c\u4f1a\u5c06\u6570\u636e\u5199\u5165\u5230\u4e00\u4e2a\u4e34\u65f6\u6587\u4ef6\u4e2d\uff0c\u6301\u4e45\u5316\u8fc7\u7a0b\u90fd\u7ed3\u675f\u4e86\uff0c\u518d\u7528\u8fd9\u4e2a\u4e34\u65f6\u6587\u4ef6\u66ff\u6362\u4e0a\u6b21\u6301\u4e45\u5316\u597d\u7684\u6587\u4ef6\u3002\u6574\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4e3b\u8fdb\u7a0b\u662f\u4e0d\u8fdb\u884c\u4efb\u4f55IO\u64cd\u4f5c\u7684\uff0c\u8fd9\u5c31\u786e\u4fdd\u4e86\u6781\u9ad8\u7684\u6027\u80fd\uff0c\u5982\u679c\u9700\u8981\u8fdb\u884c\u5927\u89c4\u6a21\u6570\u636e\u7684\u6062\u590d\uff0c\u4e14\u5bf9\u4e8e\u6570\u636e\u6062\u590d\u7684\u5b8c\u6574\u6027\u4e0d\u662f\u975e\u5e38\u654f\u611f\uff0c\u90a3RDB\u65b9\u5f0f\u662f\u8981\u6bd4AOF\u65b9\u5f0f\u66f4\u52a0\u7684\u9ad8\u6548\u3002RDB\u7684\u7f3a\u70b9\u662f\u6700\u540e\u4e00\u6b21\u6301\u4e45\u5316\u540e\u7684\u6570\u636e\u53ef\u80fd\u4e22\u5931\u3002<\/p>\n

2\u3001Fork\u7684\u4f5c\u7528\uff1a
Fork\u7684\u4f5c\u7528\u662f\u590d\u5236\u4e00\u4e2a\u4e0e\u5f53\u524d\u8fdb\u7a0b\u4e00\u6837\u7684\u8fdb\u7a0b\u3002\u65b0\u8fdb\u7a0b\u7684\u6240\u6709\u6570\u636e\uff08\u53d8\u91cf\u3001\u73af\u5883\u53d8\u91cf\u3001\u7a0b\u5e8f\u8ba1\u6570\u5668\u7b49\uff09\u6570\u503c\u90fd\u548c\u539f\u8fdb\u7a0b\u4e00\u81f4\uff0c\u4f46\u662f\u662f\u4e00\u4e2a\u5168\u65b0\u7684\u8fdb\u7a0b\uff0c\u5e76\u4f5c\u4e3a\u539f\u8fdb\u7a0b\u7684\u5b50\u8fdb\u7a0b\u3002<\/p>\n

3\u3001Rdb\u4fdd\u5b58\u7684\u662fdump.rdb\u6587\u4ef6\u3002<\/p>\n

4\u3001\u5982\u4f55\u89e6\u53d1RDB\u5feb\u7167
\uff081\uff09\u914d\u7f6e\u6587\u4ef6\u4e2d\u9ed8\u8ba4\u7684\u5feb\u7167\u914d\u7f6e\uff1a\u51b7\u62f7\u8d1d\u540e\u91cd\u65b0\u4f7f\u7528\uff08\u53ef\u4ee5cp dump.rdb dump_new.rdb\uff09\u3002
\uff082\uff09\u547d\u4ee4save\u6216\u8005bgsave\uff1aSave\uff0c\u53ea\u7ba1\u4fdd\u5b58\u5176\u4ed6\u4e0d\u7ba1\uff0c\u5168\u90e8\u963b\u585e\uff1bbgsave\uff0credis\u4f1a\u5728\u540e\u53f0\u5f02\u6b65\u8fdb\u884c\u5feb\u7167\u64cd\u4f5c\uff0c\u5feb\u7167\u540c\u65f6\u8fd8\u53ef\u4ee5\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002\u53ef\u4ee5\u901a\u8fc7lastsave\u547d\u4ee4\u83b7\u53d6\u6700\u540e\u4e00\u6b21\u6210\u529f\u6267\u884c\u5feb\u7167\u7684\u65f6\u95f4\u3002
\uff083\uff09\u6267\u884cflushall\u547d\u4ee4\uff0c\u4e5f\u4f1a\u4ea7\u751fdump.rdb\u6587\u4ef6\uff0c\u4f46\u91cc\u9762\u662f\u7a7a\u7684\uff0c\u65e0\u610f\u4e49\u3002<\/p>\n

5\u3001\u5982\u4f55\u6062\u590d\uff1a \u5c06\u5907\u4efd\u6587\u4ef6\uff08dump.rdb\uff09\u79fb\u52a8\u5230redis\u5b89\u88c5\u76ee\u5f55\u5e76\u542f\u52a8\u670d\u52a1\u5373\u53ef\u3002<\/p>\n

6\u3001\u4f18\u52bf\uff1a\u9002\u5408\u5927\u89c4\u6a21\u7684\u6570\u636e\u6062\u590d\uff1b\u5bf9\u6570\u636e\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u8981\u6c42\u4e0d\u9ad8\u3002<\/p>\n

7\u3001\u52a3\u52bf\uff1a\u5728\u4e00\u5b9a\u95f4\u9694\u65f6\u95f4\u505a\u4e00\u6b21\u5907\u4efd\uff0c\u6240\u4ee5\u5982\u679credis\u610f\u5916down\u6389\u7684\u8bdd\uff0c\u5c31\u4f1a\u4e22\u5931\u6700\u540e\u4e00\u6b21\u5feb\u7167\u540e\u7684\u6240\u6709\u4fee\u6539\u3002Fork\u7684\u65f6\u5019\uff0c\u5185\u5b58\u4e2d\u7684\u6570\u636e\u88ab\u514b\u9686\u4e86\u4e00\u4efd\uff0c\u5927\u81f42\u500d\u7684\u81a8\u80c0\u6027\u9700\u8981\u8003\u8651\u3002<\/p>\n

8\u3001\u5982\u4f55\u505c\u6b62\uff1a\u52a8\u6001\u6240\u6709\u505c\u6b62RDB\u4fdd\u5b58\u89c4\u5219\u7684\u65b9\u6cd5\uff1aredis-cli config set save \u201c\u201d<\/p>\n

\u603b\u7ed3<\/h3>\n

<\/p>\n

1\u3001RDB\u662f\u4e00\u4e2a\u975e\u5e38\u7d27\u51d1\u7684\u6587\u4ef6\u3002
2\u3001RDB\u5728\u4fdd\u5b58RDB\u6587\u4ef6\u65f6\u7236\u8fdb\u7a0b\u552f\u4e00\u9700\u8981\u505a\u7684\u5c31\u662ffork\u51fa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u63a5\u4e0b\u6765\u7684\u5de5\u4f5c\u5168\u90e8\u7531\u5b50\u8fdb\u7a0b\u6765\u505a\uff0c\u7236\u8fdb\u7a0b\u4e0d\u9700\u8981\u518d\u505a\u5176\u4ed6IO\u64cd\u4f5c\uff0c\u6240\u4ee5RDB\u6301\u4e45\u5316\u65b9\u5f0f\u53ef\u4ee5\u6700\u5927\u5316redis\u7684\u6027\u80fd\u3002
3\u3001\u4e0eAOF\u76f8\u6bd4\uff0c\u518d\u6062\u590d\u5927\u7684\u6570\u636e\u96c6\u7684\u65f6\u5019\uff0cRDB\u65b9\u5f0f\u4f1a\u66f4\u5feb\u4e00\u4e9b\u3002
4\u3001\u6570\u636e\u4e22\u5931\u98ce\u9669\u5927\u3002
5\u3001RDB\u9700\u8981\u7ecf\u5e38fork\u5b50\u8fdb\u7a0b\u6765\u4fdd\u5b58\u6570\u636e\u96c6\u5230\u786c\u76d8\u4e0a\uff0c\u5f53\u6570\u636e\u96c6\u6bd4\u8f83\u5927\u7684\u65f6\u5019\uff0cfork\u7684\u8fc7\u7a0b\u662f\u975e\u5e38\u8017\u65f6\u7684\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4Redis\u5728\u4e00\u4e9b\u6beb\u79d2\u7ea7\u4e0d\u80fd\u54cd\u5e94\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002<\/p>\n

AOF(Append Only File)<\/h2>\n

1\u3001AOF\u662f\u4ec0\u4e48\uff1a\u4ee5\u65e5\u5fd7\u7684\u5f62\u5f0f\u6765\u8bb0\u5f55\u6bcf\u4e2a\u5199\u64cd\u4f5c\uff0c\u5c06Redis\u6267\u884c\u8fc7\u7684\u6240\u6709\u5199\u6307\u4ee4\u8bb0\u5f55\u4e0b\u6765\uff08\u8bfb\u64cd\u4f5c\u4e0d\u8bb0\u5f55\uff09\uff0c\u53ea\u8bb8\u8ffd\u52a0\u6587\u4ef6\u4f46\u4e0d\u53ef\u4ee5\u6539\u5199\u6587\u4ef6\uff0credis\u542f\u52a8\u4e4b\u521d\u4f1a\u8bfb\u53d6\u8be5\u6587\u4ef6\u91cd\u65b0\u6784\u5efa\u6570\u636e\uff0c\u6362\u8a00\u4e4b\uff0credis\u91cd\u542f\u7684\u8bdd\u5c31\u6839\u636e\u65e5\u5fd7\u6587\u4ef6\u7684\u5185\u5bb9\u5c06\u5199\u6307\u4ee4\u4ece\u524d\u5230\u540e\u6267\u884c\u4e00\u6b21\u4ee5\u5b8c\u6210\u6570\u636e\u7684\u6062\u590d\u5de5\u4f5c\u3002<\/p>\n

2\u3001rewrite\u662f\u4ec0\u4e48\uff1aAOF\u91c7\u7528\u6587\u4ef6\u8ffd\u52a0\u7684\u65b9\u5f0f\uff0c\u6587\u4ef6\u4f1a\u8d8a\u6765\u8d8a\u5927\u4e3a\u907f\u514d\u51fa\u73b0\u6b64\u79cd\u60c5\u51b5\uff0c\u65b0\u589e\u4e86\u91cd\u5199\u673a\u5236\uff0c\u5f53AOF\u6587\u4ef6\u7684\u5927\u5c0f\u8d85\u8fc7\u6240\u8bbe\u5b9a\u7684\u9608\u503c\u65f6\uff0cRedis\u5c31\u4f1a\u542f\u52a8AOF\u6587\u4ef6\u7684\u5185\u5bb9\u538b\u7f29\uff0c\u53ea\u4fdd\u7559\u53ef\u4ee5\u6062\u590d\u6570\u636e\u7684\u6700\u5c0f\u6307\u4ee4\u96c6\uff0c\u53ef\u4ee5\u4f7f\u7528\u547d\u4ee4bgrewriteaof\u3002<\/p>\n

3\u3001\u91cd\u5199\u539f\u7406\uff1aAOF\u6587\u4ef6\u6301\u7eed\u589e\u957f\u800c\u8fc7\u5927\u65f6\uff0c\u4f1afork\u51fa\u4e00\u6761\u65b0\u8fdb\u7a0b\u6765\u5c06\u6587\u4ef6\u91cd\u5199\uff08\u4e5f\u662f\u5148\u5199\u4e34\u65f6\u6587\u4ef6\u6700\u540e\u518drename\uff09\uff0c\u904d\u5386\u65b0\u8fdb\u7a0b\u7684\u5185\u5b58\u4e2d\u6570\u636e\uff0c\u6bcf\u6761\u8bb0\u5f55\u6709\u4e00\u6761\u7684set\u8bed\u53e5\u3002\u91cd\u5199aof\u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u5e76\u6ca1\u6709\u8bfb\u53d6\u65e7\u7684aof\u6587\u4ef6\uff0c\u800c\u662f\u5c06\u6574\u4e2a\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5e93\u5185\u5bb9\u7528\u547d\u4ee4\u7684\u65b9\u5f0f\u91cd\u5199\u4e86\u4e00\u4e2a\u65b0\u7684aof\u6587\u4ef6\uff0c\u8fd9\u70b9\u548c\u5feb\u7167\u70b9\u6570\u7c7b\u4f3c\u3002<\/p>\n

4\u3001\u91cd\u5199\u7684\u89e6\u53d1\u673a\u5236\uff1aRedis\u4f1a\u8bb0\u5f55\u4e0a\u6b21\u91cd\u5199\u65f6AOF\u7684\u5927\u5c0f\uff0c\u9ed8\u8ba4\u914d\u7f6e\u65f6\u5f53AOF\u6587\u4ef6\u5927\u5c0f\u662f\u4e0a\u6b21rewrite\u540e\u5927\u5c0f\u7684\u4e00\u500d\u4e14\u6587\u4ef6\u5927\u4e8e64MB\u65f6\u89e6\u53d1\u3002<\/p>\n

5\u3001\u4f18\u52bf\uff1a
\uff081\uff09\u6bcf\u79d2\u540c\u6b65\uff1aappendfsync always\u540c\u6b65\u6301\u4e45\u5316\u6bcf\u6b21\u53d1\u751f\u6570\u636e\u53d8\u66f4\u4f1a\u88ab\u7acb\u5373\u8bb0\u5f55\u5230\u78c1\u76d8\uff0c\u6027\u80fd\u8f83\u5dee\u4f46\u6570\u636e\u5b8c\u6574\u6027\u6bd4\u8f83\u597d\u3002
\uff082\uff09\u6bcf\u6b21\u4fee\u6539\u540c\u6b65\uff1aappendfsync everysec \u5f02\u6b65\u64cd\u4f5c\uff0c\u6bcf\u79d2\u8bb0\u5f55\u5982\u679c\u4e00\u79d2\u5185\u5b95\u673a\uff0c\u6709\u6570\u636e\u4e22\u5931\u3002
\uff083\uff09\u4e0d\u540c\u6b65\uff1aappendfsync no \u4ece\u4e0d\u540c\u6b65\u3002<\/p>\n

6\u3001\u52a3\u52bf\uff1a
\uff081\uff09\u76f8\u540c\u6570\u636e\u96c6\u7684\u6570\u636e\u800c\u8a00aof\u6587\u4ef6\u8981\u8fdc\u5927\u4e8erdb\u6587\u4ef6\uff0c\u6062\u590d\u901f\u5ea6\u6162\u4e8erdb\u3002
\uff082\uff09AOF\u8fd0\u884c\u6548\u7387\u8981\u6162\u4e8erdb\uff0c\u6bcf\u79d2\u540c\u6b65\u7b56\u7565\u6548\u7387\u8f83\u597d\uff0c\u4e0d\u540c\u6b65\u6548\u7387\u548crdb\u76f8\u540c\u3002<\/p>\n

\u603b\u7ed3<\/h3>\n

<\/p>\n

1\u3001AOF\u6587\u4ef6\u662f\u4e00\u4e2a\u53ea\u8fdb\u884c\u8ffd\u52a0\u7684\u65e5\u5fd7\u6587\u4ef6\u3002
2\u3001Redis\u53ef\u4ee5\u518dAOF\u6587\u4ef6\u4f53\u79ef\u53d8\u5f97\u8fc7\u5927\u65f6\uff0c\u81ea\u52a8\u5730\u5728\u540e\u53f0\u5bf9AOF\u8fdb\u884c\u91cd\u5199\u3002
3\u3001AOF\u6587\u4ef6\u6709\u5e8f\u5730\u4fdd\u5b58\u4e86\u5bf9\u6570\u636e\u5e93\u6267\u884c\u7684\u6240\u6709\u5199\u5165\u64cd\u4f5c\uff0c\u8fd9\u4e9b\u5199\u5165\u64cd\u4f5c\u4ee5Redis\u534f\u8bae\u7684\u683c\u5f0f\u4fdd\u5b58\uff0c\u56e0\u6b64AOF\u6587\u4ef6\u7684\u5185\u5bb9\u975e\u5e38\u5bb9\u6613\u88ab\u4eba\u8bfb\u61c2\uff0c\u5bf9\u6587\u4ef6\u8fdb\u884c\u5206\u6790\u4e5f\u5f88\u8f7b\u677e\u3002
4\u3001\u5bf9\u4e8e\u76f8\u540c\u7684\u6570\u636e\u96c6\u6765\u8bf4\uff0cAOF\u6587\u4ef6\u7684\u4f53\u79ef\u901a\u5e38\u8981\u5927\u4e8eRDB\u6587\u4ef6\u7684\u4f53\u79ef\u3002
5\u3001\u6839\u636e\u6240\u4f7f\u7528\u7684fsync\u7b56\u7565\uff0cAOF\u7684\u901f\u5ea6\u53ef\u80fd\u4f1a\u6162\u4e8eRDB\u3002<\/p>\n

\u4e24\u79cd\u65b9\u5f0f\u7684\u603b\u7ed3<\/h2>\n

1\u3001RDB\u6301\u4e45\u5316\u65b9\u5f0f\u80fd\u591f\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u80fd\u5bf9\u4f60\u7684\u6570\u636e\u8fdb\u884c\u5feb\u7167\u5b58\u50a8\u3002
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