{"id":201433,"date":"2025-05-10T08:59:28","date_gmt":"2025-05-10T00:59:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201433\/"},"modified":"2025-05-10T08:59:28","modified_gmt":"2025-05-10T00:59:28","slug":"%e7%a1%ac%e6%a0%b8%e5%b9%b2%e8%b4%a7%ef%bc%817600%e5%ad%97%e5%b8%a6%e4%bd%a0%e5%ad%a6%e4%bc%9a-redis-%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e7%82%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201433\/","title":{"rendered":"\u786c\u6838\u5e72\u8d27\uff017600\u5b57\u5e26\u4f60\u5b66\u4f1a Redis \u6027\u80fd\u4f18\u5316\u70b9"},"content":{"rendered":"

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

\u786c\u6838\u5e72\u8d27\uff017600\u5b57\u5e26\u4f60\u5b66\u4f1a Redis \u6027\u80fd\u4f18\u5316\u70b9<\/h1>\n

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

\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300a\u786c\u6838\u5e72\u8d27\uff017600\u5b57\u5e26\u4f60\u5b66\u4f1a Redis \u6027\u80fd\u4f18\u5316\u70b9\u300b\uff0c\u6d89\u53ca\u5230\u5206\u5e03\u5f0f\u3001Redis\u3001\u4f18\u5316\u70b9\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n

 <\/p>\n

<\/p>\n

\u5728\u4e00\u4e9b\u7f51\u7edc\u670d\u52a1\u7684\u7cfb\u7edf\u4e2d\uff0cRedis \u7684\u6027\u80fd\uff0c\u53ef\u80fd\u662f\u6bd4 MySQL \u7b49\u786c\u76d8\u6570\u636e\u5e93\u7684\u6027\u80fd\u66f4\u91cd\u8981\u7684\u8bfe\u9898\u3002\u6bd4\u5982\u5fae\u535a\uff0c\u628a\u70ed\u70b9\u5fae\u535a[1]<\/sup>\uff0c\u6700\u65b0\u7684\u7528\u6237\u5173\u7cfb\uff0c\u90fd\u5b58\u50a8\u5728 Redis \u4e2d\uff0c\u5927\u91cf\u7684\u67e5\u8be2\u51fb\u4e2d Redis\uff0c\u800c\u4e0d\u8d70 MySQL\u3002<\/p>\n

\u90a3\u4e48\uff0c\u9488\u5bf9 Redis \u670d\u52a1\uff0c\u6211\u4eec\u80fd\u505a\u54ea\u4e9b\u6027\u80fd\u4f18\u5316\u5462\uff1f\u6216\u8005\u8bf4\uff0c\u5e94\u8be5\u907f\u514d\u54ea\u4e9b\u6027\u80fd\u6d6a\u8d39\u5462\uff1f<\/p>\n

Redis \u6027\u80fd\u7684\u57fa\u672c\u9762<\/h2>\n

\u5728\u8ba8\u8bba\u4f18\u5316\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u77e5\u9053\uff0cRedis \u670d\u52a1\u672c\u8eab\u5c31\u6709\u4e00\u4e9b\u7279\u6027\uff0c\u6bd4\u5982\u5355\u7ebf\u7a0b\u8fd0\u884c\u3002\u9664\u975e\u4fee\u6539 Redis \u7684\u6e90\u4ee3\u7801\uff0c\u4e0d\u7136\u8fd9\u4e9b\u7279\u6027\uff0c\u5c31\u662f\u6211\u4eec\u601d\u8003\u6027\u80fd\u4f18\u5316\u7684\u57fa\u672c\u9762\u3002<\/p>\n

\u90a3\u4e48\uff0c\u6709\u54ea\u4e9b Redis \u57fa\u672c\u7279\u6027\u9700\u8981\u6211\u4eec\u8003\u8651\u5462\uff1fRedis \u7684\u9879\u76ee\u4ecb\u7ecd\u4e2d\u6982\u62ec\u4e86\u5b83\u7279\u6027\uff1a<\/p>\n

\n

Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported.<\/p>\n<\/blockquote>\n

\u9996\u5148\uff0cRedis \u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7684\u865a\u62df\u5185\u5b58\u6765\u5b58\u50a8\u6570\u636e\u3002\u800c\u4e14\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u4e00\u822c\u5c31\u662f\u6307 Unix\u3002Windows \u4e0a\u4e5f\u80fd\u8fd0\u884c Redis\uff0c\u4f46\u662f\u9700\u8981\u7279\u6b8a\u5904\u7406\u3002\u5982\u679c\u4f60\u7684\u64cd\u4f5c\u7cfb\u7edf\u4f7f\u7528\u4ea4\u6362\u7a7a\u95f4\uff0c\u90a3\u4e48 Redis \u7684\u6570\u636e\u53ef\u80fd\u4f1a\u88ab\u5b9e\u9645\u4fdd\u5b58\u5728\u786c\u76d8\u4e0a\u3002<\/p>\n

\u5176\u6b21\uff0cRedis \u652f\u6301\u6301\u4e45\u5316\uff0c\u53ef\u4ee5\u628a\u6570\u636e\u4fdd\u5b58\u5728\u786c\u76d8\u4e0a\u3002\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u4e5f\u786e\u5b9e\u6709\u5fc5\u8981\u8fdb\u884c\u6301\u4e45\u5316\u6765\u5b9e\u73b0\u5907\u4efd\uff0c\u6570\u636e\u6062\u590d\u7b49\u9700\u6c42\u3002\u4f46\u6301\u4e45\u5316\u4e0d\u4f1a\u51ed\u7a7a\u53d1\u751f\uff0c\u5b83\u4e5f\u4f1a\u5360\u7528\u4e00\u90e8\u5206\u8d44\u6e90\u3002<\/p>\n

\u7b2c\u4e09\uff0cRedis \u662f\u7528 key-value \u7684\u65b9\u5f0f\u6765\u8bfb\u5199\u7684\uff0c\u800c value \u4e2d\u53c8\u53ef\u4ee5\u662f\u5f88\u591a\u4e0d\u540c\u79cd\u7c7b\u7684\u6570\u636e\uff1b\u66f4\u8fdb\u4e00\u6b65\uff0c\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u7684\u5e95\u5c42\u8fd8\u6709\u88ab\u5b58\u50a8\u4e3a\u4e0d\u540c\u7684\u7ed3\u6784\u3002\u4e0d\u540c\u7684\u5b58\u50a8\u7ed3\u6784\u51b3\u5b9a\u4e86\u6570\u636e\u589e\u5220\u6539\u67e5\u7684\u590d\u6742\u5ea6\u4ee5\u53ca\u6027\u80fd\u5f00\u9500\u3002<\/p>\n

\u6700\u540e\uff0c\u5728\u4e0a\u9762\u7684\u4ecb\u7ecd\u4e2d\u6ca1\u6709\u63d0\u5230\u7684\u662f\uff0cRedis \u5927\u591a\u6570\u65f6\u5019\u662f\u5355\u7ebf\u7a0b\u8fd0\u884c[2]<\/sup>\u7684\uff08single-threaded)\uff0c\u5373\u540c\u4e00\u65f6\u95f4\u53ea\u5360\u7528\u4e00\u4e2a CPU\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u6307\u4ee4\u5728\u8fd0\u884c\uff0c\u5e76\u884c\u8bfb\u5199\u662f\u4e0d\u5b58\u5728\u7684\u3002\u5f88\u591a\u64cd\u4f5c\u5e26\u6765\u7684\u5ef6\u8fdf\u95ee\u9898\uff0c\u90fd\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230\u7b54\u6848\u3002<\/p>\n

\u5173\u4e8e\u6700\u540e\u8fd9\u4e2a\u7279\u6027\uff0c\u4e3a\u4ec0\u4e48 Redis \u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u5374\u80fd\u6709\u5f88\u597d\u7684\u6027\u80fd(\u6839\u636e Amdahl\u2019s Law\uff0c\u4f18\u5316\u8017\u65f6\u5360\u6bd4\u5927\u7684\u8fc7\u7a0b\uff0c\u624d\u66f4\u6709\u610f\u4e49)\uff0c\u4e24\u53e5\u8bdd\u6982\u62ec\u662f\uff1aRedis \u5229\u7528\u4e86\u591a\u8def I\/O \u590d\u7528\u673a\u5236[3]<\/sup>\uff0c\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\uff0c\u4e0d\u4f1a\u963b\u585e\u4e3b\u7ebf\u7a0b\uff1bRedis \u5355\u7eaf\u6267\u884c\uff08\u5927\u591a\u6570\u6307\u4ee4\uff09\u4e00\u4e2a\u6307\u4ee4\u4e0d\u5230 1 \u5fae\u79d2[4]<\/sup>\uff0c\u5982\u6b64\uff0c\u5355\u6838 CPU \u4e00\u79d2\u5c31\u80fd\u5904\u7406 1 \u767e\u4e07\u4e2a\u6307\u4ee4\uff08\u5927\u6982\u5bf9\u5e94\u7740\u51e0\u5341\u4e07\u4e2a\u8bf7\u6c42\u5427\uff09\uff0c\u7528\u4e0d\u7740\u5b9e\u73b0\u591a\u7ebf\u7a0b\uff08\u7f51\u7edc\u624d\u662f\u74f6\u9888[5]<\/sup>\uff09\u3002<\/p>\n

\u4f18\u5316\u7f51\u7edc\u5ef6\u65f6<\/h2>\n

Redis \u7684\u5b98\u65b9\u535a\u5ba2\u5728\u51e0\u4e2a\u5730\u65b9\u90fd\u8bf4\uff0c\u6027\u80fd\u74f6\u9888\u66f4\u53ef\u80fd\u662f\u7f51\u7edc[6]<\/sup>\uff0c\u90a3\u4e48\u6211\u4eec\u5982\u4f55\u4f18\u5316\u7f51\u7edc\u4e0a\u7684\u5ef6\u65f6\u5462\uff1f<\/p>\n

\u9996\u5148\uff0c\u5982\u679c\u4f60\u4eec\u4f7f\u7528\u5355\u673a\u90e8\u7f72\uff08\u5e94\u7528\u670d\u52a1\u548c Redis \u5728\u540c\u4e00\u53f0\u673a\u5668\u4e0a\uff09\u7684\u8bdd\uff0c\u4f7f\u7528 Unix \u8fdb\u7a0b\u95f4\u901a\u8baf\u6765\u8bf7\u6c42 Redis \u670d\u52a1\uff0c\u901f\u5ea6\u6bd4 localhost \u5c40\u57df\u7f51\uff08\u5b66\u540d loopback\uff09\u66f4\u5feb\u3002\u5b98\u65b9\u6587\u6863[7]<\/sup>\u662f\u8fd9\u4e48\u8bf4\u7684\uff0c\u60f3\u4e00\u60f3\uff0c\u7406\u8bba\u4e0a\u4e5f\u5e94\u8be5\u662f\u8fd9\u6837\u7684\u3002<\/p>\n

\u4f46\u5f88\u591a\u516c\u53f8\u7684\u4e1a\u52a1\u89c4\u6a21\u4e0d\u662f\u5355\u673a\u90e8\u7f72\u80fd\u652f\u6491\u7684\uff0c\u6240\u4ee5\u8fd8\u662f\u5f97\u7528 TCP\u3002<\/p>\n

Redis \u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7684\u901a\u8baf\u4e00\u822c\u4f7f\u7528 TCP \u957f\u94fe\u63a5\u3002\u5982\u679c\u5ba2\u6237\u7aef\u53d1\u9001\u8bf7\u6c42\u540e\u9700\u8981\u7b49\u5f85 Redis \u8fd4\u56de\u7ed3\u679c\u518d\u53d1\u9001\u4e0b\u4e00\u4e2a\u6307\u4ee4\uff0c\u5ba2\u6237\u7aef\u548c Redis \u7684\u591a\u4e2a\u8bf7\u6c42\u5c31\u6784\u6210\u4e0b\u9762\u7684\u5173\u7cfb\uff1a<\/p>\n<\/p>\n

<\/p>\n

\uff08\u5907\u6ce8\uff1a\u5982\u679c\u4e0d\u662f\u4f60\u8981\u53d1\u9001\u7684 key \u7279\u522b\u957f\uff0c\u4e00\u4e2a TCP \u5305\u5b8c\u5168\u80fd\u653e\u4e0b Redis \u6307\u4ee4\uff0c\u6240\u4ee5\u53ea\u753b\u4e86\u4e00\u4e2a push \u5305\uff09<\/p>\n

\u8fd9\u6837\u8fd9\u4e24\u6b21\u8bf7\u6c42\u4e2d\uff0c\u5ba2\u6237\u7aef\u90fd\u9700\u8981\u7ecf\u5386\u4e00\u6bb5\u7f51\u7edc\u4f20\u8f93\u65f6\u95f4\u3002<\/p>\n

\u4f46\u5982\u679c\u6709\u53ef\u80fd\uff0c\u5b8c\u5168\u53ef\u4ee5\u4f7f\u7528 multi-key \u7c7b\u7684\u6307\u4ee4\u6765\u5408\u5e76\u8bf7\u6c42\uff0c\u6bd4\u5982\u4e24\u4e2a GET key<\/code>\u53ef\u4ee5\u7528MGET key1 key2<\/code>\u5408\u5e76\u3002\u8fd9\u6837\u5728\u5b9e\u9645\u901a\u8baf\u4e2d\uff0c\u8bf7\u6c42\u6570\u4e5f\u51cf\u5c11\u4e86\uff0c\u5ef6\u65f6\u81ea\u7136\u5f97\u5230\u597d\u8f6c\u3002<\/p>\n

\u5982\u679c\u4e0d\u80fd\u7528 multi-key \u6307\u4ee4\u6765\u5408\u5e76\uff0c\u6bd4\u5982\u4e00\u4e2a SET<\/code>\uff0c\u4e00\u4e2aGET<\/code>\u65e0\u6cd5\u5408\u5e76\u3002\u600e\u4e48\u529e\uff1f<\/p>\n

Redis \u4e2d\u6709\u81f3\u5c11\u8fd9\u6837\u4e24\u4e2a\u65b9\u6cd5\u80fd\u5408\u5e76\u591a\u4e2a\u6307\u4ee4\u5230\u4e00\u4e2a request \u4e2d\uff0c\u4e00\u4e2a\u662f MULTI\/EXEC<\/code>\uff0c\u4e00\u4e2a\u662f script\u3002\u524d\u8005\u672c\u6765\u662f\u6784\u5efa Redis \u4e8b\u52a1\u7684\u65b9\u6cd5\uff0c\u4f46\u786e\u5b9e\u53ef\u4ee5\u5408\u5e76\u591a\u4e2a\u6307\u4ee4\u4e3a\u4e00\u4e2a request\uff0c\u5b83\u5230\u901a\u8baf\u8fc7\u7a0b\u5982\u4e0b\u3002\u81f3\u4e8e script\uff0c\u6700\u597d\u5229\u7528\u7f13\u5b58\u811a\u672c\u7684 sha1 hash key \u6765\u8c03\u8d77\u811a\u672c\uff0c\u8fd9\u6837\u901a\u8baf\u91cf\u66f4\u5c0f\u3002<\/p>\n<\/p>\n

<\/p>\n

\u8fd9\u6837\u786e\u5b9e\u66f4\u80fd\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u65f6\u95f4\uff0c\u4e0d\u662f\u4e48\uff1f\u4f46\u5982\u6b64\u4ee5\u6765\uff0c\u5c31\u5fc5\u987b\u8981\u6c42\u8fd9\u4e2a transaction \/ script \u4e2d\u6d89\u53ca\u7684 key \u5728\u540c\u4e00\u4e2a node \u4e0a\uff0c\u6240\u4ee5\u8981\u914c\u60c5\u8003\u8651\u3002<\/p>\n

\u5982\u679c\u4e0a\u9762\u7684\u65b9\u6cd5\u6211\u4eec\u90fd\u8003\u8651\u8fc7\u4e86\uff0c\u8fd8\u662f\u6ca1\u6709\u529e\u6cd5\u5408\u5e76\u591a\u4e2a\u8bf7\u6c42\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u8003\u8651\u5408\u5e76\u591a\u4e2a responses\u3002\u6bd4\u5982\u628a 2 \u4e2a\u56de\u590d\u4fe1\u606f\u5408\u5e76\uff1a<\/p>\n<\/p>\n

<\/p>\n

\u8fd9\u6837\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u7701\u53bb 1 \u6b21\u56de\u590d\u6240\u7528\u7684\u7f51\u7edc\u4f20\u8f93\u65f6\u95f4\u3002\u8fd9\u5c31\u662f pipeline \u505a\u7684\u4e8b\u60c5\u3002\u4e3e\u4e2a ruby \u5ba2\u6237\u7aef\u4f7f\u7528 pipeline \u7684\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n

    \n
  1. require ‘redis’<\/span> <\/li>\n
  2. @redis<\/span> = Redis.new<\/span> <\/li>\n
  3. @redis<\/span>.pipelined do<\/span> <\/li>\n
  4. @redis<\/span>.get ‘key1’<\/span> <\/li>\n
  5. @redis<\/span>.set ‘key2’<\/span> ‘some value’<\/span> <\/li>\n
  6. end <\/li>\n
  7. # => [1<\/span>, 2<\/span>] <\/li>\n<\/ol>\n

    \u636e\u8bf4\uff0c\u6709\u4e9b\u8bed\u8a00\u7684\u5ba2\u6237\u7aef\uff0c\u751a\u81f3\u9ed8\u8ba4\u5c31\u4f7f\u7528 pipeline \u6765\u4f18\u5316\u5ef6\u65f6\u95ee\u9898\uff0c\u6bd4\u5982 node_redis\u3002<\/p>\n

    \u53e6\u5916\uff0c\u4e0d\u662f\u4efb\u610f\u591a\u4e2a\u56de\u590d\u4fe1\u606f\u90fd\u53ef\u4ee5\u653e\u8fdb\u4e00\u4e2a TCP \u5305\u4e2d\uff0c\u5982\u679c\u8bf7\u6c42\u6570\u592a\u591a\uff0c\u56de\u590d\u7684\u6570\u636e\u5f88\u957f\uff08\u6bd4\u5982 get \u4e00\u4e2a\u957f\u5b57\u7b26\u4e32\uff09\uff0cTCP \u8fd8\u662f\u4f1a\u5206\u5305\u4f20\u8f93\uff0c\u4f46\u4f7f\u7528 pipeline\uff0c\u4f9d\u7136\u53ef\u4ee5\u51cf\u5c11\u4f20\u8f93\u6b21\u6570\u3002<\/p>\n

    pipeline \u548c\u4e0a\u9762\u7684\u5176\u4ed6\u65b9\u6cd5\u90fd\u4e0d\u4e00\u6837\u7684\u662f\uff0c\u5b83\u4e0d\u5177\u6709\u539f\u5b50\u6027\u3002\u6240\u4ee5\u5728 cluster \u72b6\u6001\u4e0b\u7684\u96c6\u7fa4\u4e0a\uff0c\u5b9e\u73b0 pipeline \u6bd4\u90a3\u4e9b\u539f\u5b50\u6027\u7684\u65b9\u6cd5\u66f4\u6709\u53ef\u80fd\u3002<\/p>\n

    \u5c0f\u7ed3\u4e00\u4e0b\uff1a<\/p>\n

      \n
    1. \n

      \u4f7f\u7528 unix \u8fdb\u7a0b\u95f4\u901a\u4fe1\uff0c\u5982\u679c\u5355\u673a\u90e8\u7f72<\/p>\n<\/li>\n

    2. \n

      \u4f7f\u7528 multi-key \u6307\u4ee4\u5408\u5e76\u591a\u4e2a\u6307\u4ee4\uff0c\u51cf\u5c11\u8bf7\u6c42\u6570\uff0c\u5982\u679c\u6709\u53ef\u80fd\u7684\u8bdd<\/p>\n<\/li>\n

    3. \n

      \u4f7f\u7528 transaction\u3001script \u5408\u5e76 requests \u4ee5\u53ca responses<\/p>\n<\/li>\n

    4. \n

      \u4f7f\u7528 pipeline \u5408\u5e76 response<\/p>\n<\/li>\n<\/ol>\n

      \u8b66\u60d5\u6267\u884c\u65f6\u95f4\u957f\u7684\u64cd\u4f5c<\/h2>\n

      \u5728\u5927\u6570\u636e\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u6709\u4e9b\u64cd\u4f5c\u7684\u6267\u884c\u65f6\u95f4\u4f1a\u76f8\u5bf9\u957f\uff0c\u6bd4\u5982 KEYS *<\/code>\uff0cLRANGE mylist 0 -1<\/code>\uff0c\u4ee5\u53ca\u5176\u4ed6\u7b97\u6cd5\u590d\u6742\u5ea6\u4e3a O(n) \u7684\u6307\u4ee4\u3002\u56e0\u4e3a Redis \u53ea\u7528\u4e00\u4e2a\u7ebf\u7a0b\u6765\u505a\u6570\u636e\u67e5\u8be2\uff0c\u5982\u679c\u8fd9\u4e9b\u6307\u4ee4\u8017\u65f6\u5f88\u957f\uff0c\u5c31\u4f1a\u963b\u585e Redis\uff0c\u9020\u6210\u5927\u91cf\u5ef6\u65f6\u3002<\/p>\n

      \u5c3d\u7ba1\u5b98\u65b9\u6587\u6863\u4e2d\u8bf4 KEYS *<\/code>\u7684\u67e5\u8be2\u633a\u5feb\u7684\uff0c\uff08\u5728\u666e\u901a\u7b14\u8bb0\u672c\u4e0a\uff09\u626b\u63cf 1 \u767e\u4e07\u4e2a key\uff0c\u53ea\u9700 40 \u6beb\u79d2(\u53c2\u89c1\uff1ahttps:\/\/redis.io\/commands\/keys)\uff0c\u4f46\u51e0\u5341 ms \u5bf9\u4e8e\u4e00\u4e2a\u6027\u80fd\u8981\u6c42\u5f88\u9ad8\u7684\u7cfb\u7edf\u6765\u8bf4\uff0c\u5df2\u7ecf\u4e0d\u77ed\u4e86\uff0c\u66f4\u4f55\u51b5\u5982\u679c\u6709\u51e0\u4ebf\u4e2a key\uff08\u4e00\u53f0\u673a\u5668\u5b8c\u5168\u53ef\u80fd\u5b58\u51e0\u4ebf\u4e2a key\uff0c\u6bd4\u5982\u4e00\u4e2a key 100\u5b57\u8282\uff0c1 \u4ebf\u4e2a key \u53ea\u6709 10GB\uff09\uff0c\u65f6\u95f4\u66f4\u957f\u3002<\/p>\n

      \u6240\u4ee5\uff0c\u5c3d\u91cf\u4e0d\u8981\u5728\u751f\u4ea7\u73af\u5883\u7684\u4ee3\u7801\u4f7f\u7528\u8fd9\u4e9b\u6267\u884c\u5f88\u6162\u7684\u6307\u4ee4\uff0c\u8fd9\u4e00\u70b9 Redis \u7684\u4f5c\u8005\u5728\u535a\u5ba2[8]<\/sup>\u4e2d\u4e5f\u63d0\u5230\u4e86\u3002\u53e6\u5916\uff0c\u8fd0\u7ef4\u540c\u5b66\u67e5\u8be2 Redis \u7684\u65f6\u5019\u4e5f\u5c3d\u91cf\u4e0d\u8981\u7528\u3002\u751a\u81f3\uff0cRedis Essential \u8fd9\u672c\u4e66\u5efa\u8bae\u5229\u7528rename-command KEYS ''<\/code>\u6765\u7981\u6b62\u4f7f\u7528\u8fd9\u4e2a\u8017\u65f6\u7684\u6307\u4ee4\u3002<\/p>\n

      \u9664\u4e86\u8fd9\u4e9b\u8017\u65f6\u7684\u6307\u4ee4\uff0cRedis \u4e2d transaction\uff0cscript\uff0c\u56e0\u4e3a\u53ef\u4ee5\u5408\u5e76\u591a\u4e2a commands \u4e3a\u4e00\u4e2a\u5177\u6709\u539f\u5b50\u6027\u7684\u6267\u884c\u8fc7\u7a0b\uff0c\u6240\u4ee5\u4e5f\u53ef\u80fd\u5360\u7528 Redis \u5f88\u957f\u65f6\u95f4\uff0c\u9700\u8981\u6ce8\u610f\u3002<\/p>\n

      \u5982\u679c\u4f60\u60f3\u627e\u51fa\u751f\u4ea7\u73af\u5883\u4f7f\u7528\u7684\u300c\u6162\u6307\u4ee4\u300d\uff0c\u90a3\u4e48\u53ef\u4ee5\u5229\u7528 SLOWLOG GET count<\/code>\u6765\u67e5\u770b\u6700\u8fd1\u7684 count \u4e2a\u6267\u884c\u65f6\u95f4\u5f88\u957f\u7684\u6307\u4ee4\u3002\u81f3\u4e8e\u591a\u957f\u7b97\u957f\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728 redis.conf \u4e2d\u8bbe\u7f6e slowlog-log-slower-than \u6765\u5b9a\u4e49\u3002<\/p>\n

      \u9664\u6b64\u4e4b\u5916\uff0c\u5728\u5f88\u591a\u5730\u65b9\u90fd\u6ca1\u6709\u63d0\u5230\u7684\u4e00\u4e2a\u53ef\u80fd\u7684\u6162\u6307\u4ee4\u662f DEL<\/code>\uff0c\u4f46 redis.conf \u6587\u4ef6\u7684\u6ce8\u91ca[9]<\/sup>\u4e2d\u5012\u662f\u8bf4\u4e86\u3002\u957f\u8bdd\u77ed\u8bf4\u5c31\u662f DEL \u4e00\u4e2a\u5927\u7684 object \u65f6\u5019\uff0c\u56de\u6536\u76f8\u5e94\u7684\u5185\u5b58\u53ef\u80fd\u4f1a\u9700\u8981\u5f88\u957f\u65f6\u95f4\uff08\u751a\u81f3\u51e0\u79d2\uff09\uff0c\u6240\u4ee5\uff0c\u5efa\u8bae\u7528 DEL \u7684\u5f02\u6b65\u7248\u672c\uff1aUNLINK<\/code>\u3002\u540e\u8005\u4f1a\u542f\u52a8\u4e00\u4e2a\u65b0\u7684 thread \u6765\u5220\u9664\u76ee\u6807 key\uff0c\u800c\u4e0d\u963b\u585e\u539f\u6765\u7684\u7ebf\u7a0b\u3002<\/p>\n

      \u66f4\u8fdb\u4e00\u6b65\uff0c\u5f53\u4e00\u4e2a key \u8fc7\u671f\u4e4b\u540e\uff0cRedis \u4e00\u822c\u4e5f\u9700\u8981\u540c\u6b65\u7684\u628a\u5b83\u5220\u9664\u3002\u5176\u4e2d\u4e00\u79cd\u5220\u9664 keys \u7684\u65b9\u5f0f\u662f\uff0c\u6bcf\u79d2 10 \u6b21\u7684\u68c0\u67e5\u4e00\u6b21\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684 keys\uff0c\u8fd9\u4e9b keys \u5b58\u50a8\u5728\u4e00\u4e2a\u5168\u5c40\u7684 struct \u4e2d\uff0c\u53ef\u4ee5\u7528 server.db->expires<\/code>\u8bbf\u95ee\u3002\u68c0\u67e5\u7684\u65b9\u5f0f\u662f\uff1a<\/p>\n

        \n
      1. \n

        \u4ece\u4e2d\u968f\u673a\u53d6\u51fa 20 \u4e2a keys<\/p>\n<\/li>\n

      2. \n

        \u628a\u8fc7\u671f\u7684\u5220\u6389\u3002<\/p>\n<\/li>\n

      3. \n

        \u5982\u679c\u521a\u521a 20 \u4e2a keys \u4e2d\uff0c\u6709 25% \u4ee5\u4e0a\uff08\u4e5f\u5c31\u662f 5 \u4e2a\u4ee5\u4e0a\uff09\u90fd\u662f\u8fc7\u671f\u7684\uff0cRedis \u8ba4\u4e3a\uff0c\u8fc7\u671f\u7684 keys \u8fd8\u633a\u591a\u7684\uff0c\u7ee7\u7eed\u91cd\u590d\u6b65\u9aa4 1\uff0c\u76f4\u5230\u6ee1\u8db3\u9000\u51fa\u6761\u4ef6\uff1a\u67d0\u6b21\u53d6\u51fa\u7684 keys \u4e2d\u6ca1\u6709\u90a3\u4e48\u591a\u8fc7\u53bb\u7684 keys\u3002<\/p>\n<\/li>\n<\/ol>\n

        \u8fd9\u91cc\u5bf9\u4e8e\u6027\u80fd\u7684\u5f71\u54cd\u662f\uff0c\u5982\u679c\u771f\u7684\u6709\u5f88\u591a\u7684 keys \u5728\u540c\u4e00\u65f6\u95f4\u8fc7\u671f\uff0c\u90a3\u4e48 Redis \u771f\u7684\u4f1a\u4e00\u76f4\u5faa\u73af\u6267\u884c\u5220\u9664\uff0c\u5360\u7528\u4e3b\u7ebf\u7a0b\u3002<\/p>\n

        \u5bf9\u6b64\uff0cRedis \u4f5c\u8005\u7684\u5efa\u8bae[10]<\/sup>\u662f\u8b66\u60d5EXPIREAT<\/code>\u8fd9\u4e2a\u6307\u4ee4\uff0c\u56e0\u4e3a\u5b83\u66f4\u5bb9\u6613\u4ea7\u751f keys \u540c\u65f6\u8fc7\u671f\u7684\u73b0\u8c61\u3002\u6211\u8fd8\u89c1\u5230\u8fc7\u4e00\u4e9b\u5efa\u8bae\u662f\u7ed9 keys \u7684\u8fc7\u671f\u65f6\u95f4\u8bbe\u7f6e\u4e00\u4e2a\u968f\u673a\u6ce2\u52a8\u91cf\u3002\u6700\u540e\uff0credis.conf \u4e2d\u4e5f\u7ed9\u51fa\u4e86\u4e00\u4e2a\u65b9\u6cd5\uff0c\u628a keys \u7684\u8fc7\u671f\u5220\u9664\u64cd\u4f5c\u53d8\u4e3a\u5f02\u6b65\u7684\uff0c\u5373\uff0c\u5728 redis.conf \u4e2d\u8bbe\u7f6elazyfree-lazy-expire yes<\/code>\u3002<\/p>\n

        \u4f18\u5316\u6570\u636e\u7ed3\u6784\u3001\u4f7f\u7528\u6b63\u786e\u7684\u7b97\u6cd5<\/h2>\n

        \u4e00\u79cd\u6570\u636e\u7c7b\u578b\uff08\u6bd4\u5982 string\uff0clist\uff09\u8fdb\u884c\u589e\u5220\u6539\u67e5\u7684\u6548\u7387\u662f\u7531\u5176\u5e95\u5c42\u7684\u5b58\u50a8\u7ed3\u6784\u51b3\u5b9a\u7684\u3002<\/p>\n

        \u6211\u4eec\u5728\u4f7f\u7528\u4e00\u79cd\u6570\u636e\u7c7b\u578b\u65f6\uff0c\u53ef\u4ee5\u9002\u5f53\u5173\u6ce8\u4e00\u4e0b\u5b83\u5e95\u5c42\u7684\u5b58\u50a8\u7ed3\u6784\u53ca\u5176\u7b97\u6cd5\uff0c\u907f\u514d\u4f7f\u7528\u590d\u6742\u5ea6\u592a\u9ad8\u7684\u65b9\u6cd5\u3002\u4e3e\u4e24\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

          \n
        1. ZADD<\/code>\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662f O(log(N))\uff0c\u8fd9\u6bd4\u5176\u4ed6\u6570\u636e\u7c7b\u578b\u589e\u52a0\u4e00\u4e2a\u65b0\u5143\u7d20\u7684\u64cd\u4f5c\u66f4\u590d\u6742\uff0c\u6240\u4ee5\u8981\u5c0f\u5fc3\u4f7f\u7528\u3002<\/li>\n
        2. \n

          \u82e5 Hash \u7c7b\u578b\u7684\u503c\u7684 fields \u6570\u91cf\u6709\u9650\uff0c\u5b83\u5f88\u6709\u53ef\u80fd\u91c7\u7528 ziplist \u8fd9\u79cd\u7ed3\u6784\u505a\u5b58\u50a8\uff0c\u800c ziplist \u7684\u67e5\u8be2\u6548\u7387\u53ef\u80fd\u6ca1\u6709\u540c\u7b49\u5b57\u6bb5\u6570\u91cf\u7684 hashtable \u6548\u7387\u9ad8\uff0c\u5728\u5fc5\u8981\u65f6\uff0c\u53ef\u4ee5\u8c03\u6574 Redis \u7684\u5b58\u50a8\u7ed3\u6784\u3002<\/p>\n<\/li>\n<\/ol>\n

          \u9664\u4e86\u65f6\u95f4\u6027\u80fd\u4e0a\u7684\u8003\u8651\uff0c\u6709\u65f6\u5019\u6211\u4eec\u8fd8\u9700\u8981\u8282\u7701\u5b58\u50a8\u7a7a\u95f4\u3002\u6bd4\u5982\u4e0a\u9762\u63d0\u5230\u7684 ziplist \u7ed3\u6784\uff0c\u5c31\u6bd4 hashtable \u7ed3\u6784\u8282\u7701\u5b58\u50a8\u7a7a\u95f4\uff08Redis Essentials \u7684\u4f5c\u8005\u5206\u522b\u5728 hashtable \u548c ziplist \u7ed3\u6784\u7684 Hash \u4e2d\u63d2\u5165 500 \u4e2a fields\uff0c\u6bcf\u4e2a field \u548c value \u90fd\u662f\u4e00\u4e2a 15 \u4f4d\u5de6\u53f3\u7684\u5b57\u7b26\u4e32\uff0c\u7ed3\u679c\u662f hashtable \u7ed3\u6784\u4f7f\u7528\u7684\u7a7a\u95f4\u662f ziplist \u7684 4 \u500d\u3002\uff09\u3002\u4f46\u8282\u7701\u7a7a\u95f4\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5176\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u53ef\u80fd\u5f88\u9ad8\u3002\u6240\u4ee5\uff0c\u8fd9\u91cc\u5c31\u9700\u8981\u5728\u5177\u4f53\u95ee\u9898\u9762\u524d\u505a\u51fa\u6743\u8861\u3002\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff1a\u6731\u5c0f\u53ae\u7684\u535a\u5ba2\uff0c\u56de\u590d\uff1a1024\uff0c\u53ef\u4ee5\u9886\u53d6redis\u4e13\u5c5e\u8d44\u6599\u3002<\/p>\n

          \u5982\u4f55\u505a\u51fa\u66f4\u597d\u7684\u6743\u8861\uff1f\u6211\u89c9\u5f97\u5f97\u6df1\u6316 Redis \u7684\u5b58\u50a8\u7ed3\u6784\u624d\u80fd\u8ba9\u81ea\u5df1\u5b89\u5fc3\u3002\u8fd9\u65b9\u9762\u7684\u5185\u5bb9\u6211\u4eec\u4e0b\u6b21\u518d\u8bf4\u3002<\/p>\n

          \u4ee5\u4e0a\u8fd9\u4e09\u70b9\u90fd\u662f\u7f16\u7a0b\u5c42\u9762\u7684\u8003\u8651\uff0c\u5199\u7a0b\u5e8f\u65f6\u5e94\u8be5\u6ce8\u610f\u554a\u3002\u4e0b\u9762\u8fd9\u51e0\u70b9\uff0c\u4e5f\u4f1a\u5f71\u54cd Redis \u7684\u6027\u80fd\uff0c\u4f46\u89e3\u51b3\u8d77\u6765\uff0c\u5c31\u4e0d\u53ea\u662f\u9760\u4ee3\u7801\u5c42\u9762\u7684\u8c03\u6574\u4e86\uff0c\u8fd8\u9700\u8981\u67b6\u6784\u548c\u8fd0\u7ef4\u4e0a\u7684\u8003\u8651\u3002<\/p>\n

          \u8003\u8651\u64cd\u4f5c\u7cfb\u7edf\u548c\u786c\u4ef6\u662f\u5426\u5f71\u54cd\u6027\u80fd<\/h2>\n

          Redis \u8fd0\u884c\u7684\u5916\u90e8\u73af\u5883\uff0c\u4e5f\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u548c\u786c\u4ef6\u663e\u7136\u4e5f\u4f1a\u5f71\u54cd Redis \u7684\u6027\u80fd\u3002\u5728\u5b98\u65b9\u6587\u6863\u4e2d\uff0c\u5c31\u7ed9\u51fa\u4e86\u4e00\u4e9b\u4f8b\u5b50\uff1a<\/p>\n

            \n
          1. \n

            CPU\uff1aIntel \u591a\u79cd CPU \u90fd\u6bd4 AMD \u7693\u9f99\u7cfb\u5217\u597d<\/p>\n<\/li>\n

          2. \n

            \u865a\u62df\u5316\uff1a\u5b9e\u4f53\u673a\u6bd4\u865a\u62df\u673a\u597d\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u90e8\u5206\u865a\u62df\u673a\u4e0a\uff0c\u786c\u76d8\u4e0d\u662f\u672c\u5730\u786c\u76d8\uff0c\u76d1\u63a7\u8f6f\u4ef6\u5bfc\u81f4 fork \u6307\u4ee4\u7684\u901f\u5ea6\u6162\uff08\u6301\u4e45\u5316\u65f6\u4f1a\u7528\u5230 fork\uff09\uff0c\u5c24\u5176\u662f\u7528 Xen \u6765\u505a\u865a\u62df\u5316\u65f6\u3002<\/p>\n<\/li>\n

          3. \u5185\u5b58\u7ba1\u7406\uff1a\u5728 linux \u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u4e3a\u4e86\u8ba9 translation lookaside buffer\uff0c\u5373 TLB\uff0c\u80fd\u591f\u7ba1\u7406\u66f4\u591a\u5185\u5b58\u7a7a\u95f4\uff08TLB \u53ea\u80fd\u7f13\u5b58\u6709\u9650\u4e2a page\uff09\uff0c\u64cd\u4f5c\u7cfb\u7edf\u628a\u4e00\u4e9b memory page \u53d8\u5f97\u66f4\u5927\uff0c\u6bd4\u5982 2MB \u6216\u8005 1GB\uff0c\u800c\u4e0d\u662f\u901a\u5e38\u7684 4096 \u5b57\u8282\uff0c\u8fd9\u4e9b\u5927\u7684\u5185\u5b58\u9875\u53eb\u505a huge pages\u3002\u540c\u65f6\uff0c\u4e3a\u4e86\u65b9\u4fbf\u7a0b\u5e8f\u5458\u4f7f\u7528\u8fd9\u4e9b\u5927\u7684\u5185\u5b58 page\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u5b9e\u73b0\u4e86\u4e00\u4e2a transparent huge pages\uff08THP\uff09\u673a\u5236\uff0c\u4f7f\u5f97\u5927\u5185\u5b58\u9875\u5bf9\u4ed6\u4eec\u6765\u8bf4\u662f\u900f\u660e\u7684\uff0c\u53ef\u4ee5\u50cf\u4f7f\u7528\u6b63\u5e38\u7684\u5185\u5b58 page \u4e00\u6837\u4f7f\u7528\u4ed6\u4eec\u3002\u4f46\u8fd9\u79cd\u673a\u5236\u5e76\u4e0d\u662f\u6570\u636e\u5e93\u6240\u9700\u8981\u7684\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a THP \u4f1a\u628a\u5185\u5b58\u7a7a\u95f4\u53d8\u5f97\u7d27\u51d1\u800c\u8fde\u7eed\u5427\uff0c\u5c31\u50cfmongodb \u7684\u6587\u6863[11]<\/sup>\u4e2d\u660e\u786e\u8bf4\u7684\uff0c\u6570\u636e\u5e93\u9700\u8981\u7684\u662f\u7a00\u758f\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u6240\u4ee5\u8bf7\u7981\u6389 THP \u529f\u80fd\u3002Redis \u4e5f\u4e0d\u4f8b\u5916\uff0c\u4f46 Redis \u5b98\u65b9\u535a\u5ba2\u4e0a\u7ed9\u51fa\u7684\u7406\u7531\u662f\uff1a\u4f7f\u7528\u5927\u5185\u5b58 page \u4f1a\u4f7f bgsave \u65f6\uff0cfork \u7684\u901f\u5ea6\u53d8\u6162\uff1b\u5982\u679c fork \u4e4b\u540e\uff0c\u8fd9\u4e9b\u5185\u5b58 page \u5728\u539f\u8fdb\u7a0b\u4e2d\u88ab\u4fee\u6539\u4e86\uff0c\u4ed6\u4eec\u5c31\u9700\u8981\u88ab\u590d\u5236\uff08\u5373 copy on write\uff09\uff0c\u8fd9\u6837\u7684\u590d\u5236\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u5185\u5b58\uff08\u6bd5\u7adf\uff0c\u4eba\u5bb6\u662f huge pages\uff0c\u590d\u5236\u4e00\u4efd\u6d88\u8017\u6210\u672c\u5f88\u5927\uff09\u3002\u6240\u4ee5\uff0c\u8bf7\u7981\u6b62\u6389\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684 transparent huge pages \u529f\u80fd\u3002<\/li>\n
          4. \n

            \u4ea4\u6362\u7a7a\u95f4\uff1a\u5f53\u4e00\u4e9b\u5185\u5b58 page \u88ab\u5b58\u50a8\u5728\u4ea4\u6362\u7a7a\u95f4\u6587\u4ef6\u4e0a\uff0c\u800c Redis \u53c8\u8981\u8bf7\u6c42\u90a3\u4e9b\u6570\u636e\uff0c\u90a3\u4e48\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u963b\u585e Redis \u8fdb\u7a0b\uff0c\u7136\u540e\u628a\u60f3\u8981\u7684 page\uff0c\u4ece\u4ea4\u6362\u7a7a\u95f4\u4e2d\u62ff\u51fa\u6765\uff0c\u653e\u8fdb\u5185\u5b58\u3002\u8fd9\u5176\u4e2d\u6d89\u53ca\u6574\u4e2a\u8fdb\u7a0b\u7684\u963b\u585e\uff0c\u6240\u4ee5\u53ef\u80fd\u4f1a\u9020\u6210\u5ef6\u65f6\u95ee\u9898\uff0c\u4e00\u4e2a\u89e3\u51b3\u65b9\u6cd5\u662f\u7981\u6b62\u4f7f\u7528\u4ea4\u6362\u7a7a\u95f4\uff08Redis Essentials \u4e2d\u5982\u662f\u5efa\u8bae\uff0c\u5982\u679c\u5185\u5b58\u7a7a\u95f4\u4e0d\u8db3\uff0c\u8bf7\u7528\u522b\u7684\u65b9\u6cd5\u5904\u7406\uff09\u3002<\/p>\n<\/li>\n<\/ol>\n

            \u8003\u8651\u6301\u4e45\u5316\u5e26\u6765\u7684\u5f00\u9500<\/h2>\n

            Redis \u7684\u4e00\u9879\u91cd\u8981\u529f\u80fd\u5c31\u662f\u6301\u4e45\u5316\uff0c\u4e5f\u5c31\u662f\u628a\u6570\u636e\u590d\u5236\u5230\u786c\u76d8\u4e0a\u3002\u57fa\u4e8e\u6301\u4e45\u5316\uff0c\u624d\u6709\u4e86 Redis \u7684\u6570\u636e\u6062\u590d\u7b49\u529f\u80fd\u3002<\/p>\n

            \u4f46\u7ef4\u62a4\u8fd9\u4e2a\u6301\u4e45\u5316\u7684\u529f\u80fd\uff0c\u4e5f\u662f\u6709\u6027\u80fd\u5f00\u9500\u7684\u3002<\/p>\n

            \u9996\u5148\u8bf4\uff0cRDB \u5168\u91cf\u6301\u4e45\u5316\u3002<\/p>\n

            \u8fd9\u79cd\u6301\u4e45\u5316\u65b9\u5f0f\u628a Redis \u4e2d\u7684\u5168\u91cf\u6570\u636e\u6253\u5305\u6210 rdb \u6587\u4ef6\u653e\u5728\u786c\u76d8\u4e0a\u3002\u4f46\u662f\u6267\u884c RDB \u6301\u4e45\u5316\u8fc7\u7a0b\u7684\u662f\u539f\u8fdb\u7a0b fork \u51fa\u6765\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u800c fork \u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\u662f\u9700\u8981\u65f6\u95f4\u7684\uff0c\u6839\u636eRedis Lab 6 \u5e74\u524d\u505a\u7684\u5b9e\u9a8c[12]<\/sup>\uff0c\u5728\u4e00\u53f0\u65b0\u578b\u7684 AWS EC2 m1.small^13 \u4e0a\uff0cfork \u4e00\u4e2a\u5185\u5b58\u5360\u7528 1GB \u7684 Redis \u8fdb\u7a0b\uff0c\u9700\u8981 700+ \u6beb\u79d2\uff0c\u800c\u8fd9\u6bb5\u65f6\u95f4\uff0credis \u662f\u65e0\u6cd5\u5904\u7406\u8bf7\u6c42\u7684\u3002<\/p>\n

            \u867d\u7136\u73b0\u5728\u7684\u673a\u5668\u5e94\u8be5\u90fd\u4f1a\u6bd4\u90a3\u4e2a\u65f6\u5019\u597d\uff0c\u4f46\u662f fork \u7684\u5f00\u9500\u4e5f\u5e94\u8be5\u8003\u8651\u5427\u3002\u4e3a\u6b64\uff0c\u8981\u4f7f\u7528\u5408\u7406\u7684 RDB \u6301\u4e45\u5316\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u4e0d\u8981\u592a\u9891\u7e41<\/strong>\u3002<\/p>\n

            \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u53e6\u5916\u4e00\u79cd\u6301\u4e45\u5316\u65b9\u5f0f\uff1aAOF \u589e\u91cf\u6301\u4e45\u5316\u3002<\/p>\n

            \u8fd9\u79cd\u6301\u4e45\u5316\u65b9\u5f0f\u4f1a\u628a\u4f60\u53d1\u5230 redis server \u7684\u6307\u4ee4\u4ee5\u6587\u672c\u7684\u5f62\u5f0f\u4fdd\u5b58\u4e0b\u6765\uff08\u683c\u5f0f\u9075\u5faa redis protocol\uff09\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u8c03\u7528\u4e24\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u4e00\u4e2a\u662f write(2)<\/code>\uff0c\u540c\u6b65\u5b8c\u6210\uff0c\u4e00\u4e2a\u662ffsync(2)<\/code>\uff0c\u5f02\u6b65\u5b8c\u6210\u3002<\/p>\n

            \u8fd9\u4e24\u90e8\u90fd\u53ef\u80fd\u662f\u5ef6\u65f6\u95ee\u9898\u7684\u539f\u56e0\uff1a<\/p>\n

              \n
            1. \n

              write \u53ef\u80fd\u4f1a\u56e0\u4e3a\u8f93\u51fa\u7684 buffer \u6ee1\u4e86\uff0c\u6216\u8005 kernal \u6b63\u5728\u628a buffer \u4e2d\u7684\u6570\u636e\u540c\u6b65\u5230\u786c\u76d8\uff0c\u5c31\u88ab\u963b\u585e\u4e86\u3002<\/p>\n<\/li>\n

            2. \n

              fsync \u7684\u4f5c\u7528\u662f\u786e\u4fdd write \u5199\u5165\u5230 aof \u6587\u4ef6\u7684\u6570\u636e\u843d\u5230\u4e86\u786c\u76d8\u4e0a\uff0c\u5728\u4e00\u4e2a 7200 \u8f6c\/\u5206\u7684\u786c\u76d8\u4e0a\u53ef\u80fd\u8981\u5ef6\u65f6 20 \u6beb\u79d2\u5de6\u53f3\uff0c\u6d88\u8017\u8fd8\u662f\u633a\u5927\u7684\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5728 fsync \u8fdb\u884c\u7684\u65f6\u5019\uff0cwrite \u53ef\u80fd\u4f1a\u88ab\u963b\u585e\u3002<\/p>\n<\/li>\n<\/ol>\n

              \u5176\u4e2d\uff0cwrite \u7684\u963b\u585e\u8c8c\u4f3c\u53ea\u80fd\u63a5\u53d7\uff0c\u56e0\u4e3a\u6ca1\u6709\u66f4\u597d\u7684\u65b9\u6cd5\u628a\u6570\u636e\u5199\u5230\u4e00\u4e2a\u6587\u4ef6\u4e2d\u4e86\u3002\u4f46\u5bf9\u4e8e fsync\uff0cRedis \u5141\u8bb8\u4e09\u79cd\u914d\u7f6e\uff0c\u9009\u7528\u54ea\u79cd\u53d6\u51b3\u4e8e\u4f60\u5bf9\u5907\u4efd\u53ca\u65f6\u6027\u548c\u6027\u80fd\u7684\u5e73\u8861\uff1a<\/p>\n

                \n
              1. \n

                always\uff1a\u5f53\u628a appendfsync \u8bbe\u7f6e\u4e3a always\uff0cfsync \u4f1a\u548c\u5ba2\u6237\u7aef\u7684\u6307\u4ee4\u540c\u6b65\u6267\u884c\uff0c\u56e0\u6b64\u6700\u53ef\u80fd\u9020\u6210\u5ef6\u65f6\u95ee\u9898\uff0c\u4f46\u5907\u4efd\u53ca\u65f6\u6027\u6700\u597d\u3002<\/p>\n<\/li>\n

              2. \n

                everysec\uff1a\u6bcf\u79d2\u949f\u5f02\u6b65\u6267\u884c\u4e00\u6b21 fsync\uff0c\u6b64\u65f6 redis \u7684\u6027\u80fd\u8868\u73b0\u4f1a\u66f4\u597d\uff0c\u4f46\u662f fsync \u4f9d\u7136\u53ef\u80fd\u963b\u585e write\uff0c\u7b97\u662f\u4e00\u4e2a\u6298\u4e2d\u9009\u62e9\u3002<\/p>\n<\/li>\n

              3. \n

                no\uff1aredis \u4e0d\u4f1a\u4e3b\u52a8\u51fa\u53d1 fsync \uff08\u5e76\u4e0d\u662f\u6c38\u8fdc\u4e0d fsync\uff0c\u90a3\u662f\u4e0d\u592a\u53ef\u80fd\u7684\uff09\uff0c\u800c\u7531 kernel \u51b3\u5b9a\u4f55\u65f6 fsync<\/p>\n<\/li>\n<\/ol>\n

                \u4f7f\u7528\u5206\u5e03\u5f0f\u67b6\u6784 \u2014\u2014 \u8bfb\u5199\u5206\u79bb\u3001\u6570\u636e\u5206\u7247<\/h2>\n

                \u4ee5\u4e0a\uff0c\u6211\u4eec\u90fd\u662f\u57fa\u4e8e\u5355\u53f0\uff0c\u6216\u8005\u5355\u4e2a Redis \u670d\u52a1\u8fdb\u884c\u4f18\u5316\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u8003\u8651\u5f53\u7f51\u7ad9\u7684\u89c4\u6a21\u53d8\u5927\u65f6\uff0c\u5229\u7528\u5206\u5e03\u5f0f\u67b6\u6784\u6765\u4fdd\u969c Redis \u6027\u80fd\u7684\u95ee\u9898\u3002<\/p>\n

                \u9996\u5148\u8bf4\uff0c\u54ea\u4e9b\u60c5\u51b5\u4e0b\u4e0d\u5f97\u4e0d\uff08\u6216\u8005\u6700\u597d\uff09\u4f7f\u7528\u5206\u5e03\u5f0f\u67b6\u6784\uff1a<\/p>\n

                  \n
                1. \n

                  \u6570\u636e\u91cf\u5f88\u5927\uff0c\u5355\u53f0\u670d\u52a1\u5668\u5185\u5b58\u4e0d\u53ef\u80fd\u88c5\u5f97\u4e0b\uff0c\u6bd4\u5982 1 \u4e2a T \u8fd9\u79cd\u91cf\u7ea7<\/p>\n<\/li>\n

                2. \n

                  \u9700\u8981\u670d\u52a1\u9ad8\u53ef\u7528<\/p>\n<\/li>\n

                3. \n

                  \u5355\u53f0\u7684\u8bf7\u6c42\u538b\u529b\u8fc7\u5927<\/p>\n<\/li>\n<\/ol>\n

                  \u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u53ef\u4ee5\u91c7\u7528\u6570\u636e\u5206\u7247\u6216\u8005\u4e3b\u4ece\u5206\u79bb\uff0c\u6216\u8005\u4e24\u8005\u90fd\u7528\uff08\u5373\uff0c\u5728\u5206\u7247\u7528\u7684 cluster \u8282\u70b9\u4e0a\uff0c\u4e5f\u8bbe\u7f6e\u4e3b\u4ece\u7ed3\u6784\uff09\u3002<\/p>\n

                  \u8fd9\u6837\u7684\u67b6\u6784\uff0c\u53ef\u4ee5\u4e3a\u6027\u80fd\u63d0\u5347\u52a0\u5165\u65b0\u7684\u5207\u5165\u70b9\uff1a<\/p>\n

                    \n
                  1. \n

                    \u628a\u6162\u901f\u7684\u6307\u4ee4\u53d1\u5230\u67d0\u4e9b\u4ece\u5e93\u4e2d\u6267\u884c<\/p>\n<\/li>\n

                  2. \n

                    \u628a\u6301\u4e45\u5316\u529f\u80fd\u653e\u5728\u4e00\u4e2a\u5f88\u5c11\u4f7f\u7528\u7684\u4ece\u5e93\u4e0a<\/p>\n<\/li>\n

                  3. \n

                    \u628a\u67d0\u4e9b\u5927 list \u5206\u7247<\/p>\n<\/li>\n<\/ol>\n

                    \u5176\u4e2d\u524d\u4e24\u6761\u90fd\u662f\u6839\u636e Redis \u5355\u7ebf\u7a0b\u7684\u7279\u6027\uff0c\u7528\u5176\u4ed6\u8fdb\u7a0b\uff08\u751a\u81f3\u673a\u5668\uff09\u505a\u6027\u80fd\u8865\u5145\u7684\u65b9\u6cd5\u3002<\/p>\n

                    \u5f53\u7136\uff0c\u4f7f\u7528\u5206\u5e03\u5f0f\u67b6\u6784\uff0c\u4e5f\u53ef\u80fd\u5bf9\u6027\u80fd\u6709\u5f71\u54cd\uff0c\u6bd4\u5982\u8bf7\u6c42\u9700\u8981\u88ab\u8f6c\u53d1\uff0c\u6570\u636e\u9700\u8981\u88ab\u4e0d\u65ad\u590d\u5236\u5206\u53d1\u3002\uff08\u5f85\u67e5\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"

                    \u786c\u6838\u5e72\u8d27\uff017600\u5b57\u5e26\u4f60\u5b66\u4f1a R...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201433","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201433","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=201433"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201433\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}