{"id":201211,"date":"2025-05-10T10:08:51","date_gmt":"2025-05-10T02:08:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201211\/"},"modified":"2025-05-10T10:08:51","modified_gmt":"2025-05-10T02:08:51","slug":"redis%e9%ab%98%e6%95%88%e7%8e%87%e5%8e%9f%e5%9b%a0%e5%8f%8a%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201211\/","title":{"rendered":"Redis\u9ad8\u6548\u7387\u539f\u56e0\u53ca\u6570\u636e\u7ed3\u6784\u5206\u6790"},"content":{"rendered":"

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

Redis\u9ad8\u6548\u7387\u539f\u56e0\u53ca\u6570\u636e\u7ed3\u6784\u5206\u6790<\/h1>\n

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

\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0cgolang\u5b66\u4e60\u7f51\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aRedis\u9ad8\u6548\u7387\u539f\u56e0\u53ca\u6570\u636e\u7ed3\u6784\u5206\u6790\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\u6548\u7387\u3001Redis\u6570\u636e\u7ed3\u6784\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

1\u3001\u4ec0\u4e48\u662fredis\uff1f\u5b83\u4e3b\u8981\u7528\u6765\u5e72\u4ec0\u4e48\u7684\uff1f<\/h2>\n

Redis\uff0c\u82f1\u6587\u5168\u79f0\u662fRemote Dictionary Server\uff08\u8fdc\u7a0b\u5b57\u5178\u670d\u52a1\uff09\uff0c\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u4f7f\u7528ANSI C\u8bed\u8a00\u7f16\u5199\u3001\u652f\u6301\u7f51\u7edc\u3001\u53ef\u57fa\u4e8e\u5185\u5b58\u4ea6\u53ef\u6301\u4e45\u5316\u7684\u65e5\u5fd7\u578b\u3001Key-Value\u6570\u636e\u5e93\uff0c\u5e76\u63d0\u4f9b\u591a\u79cd\u8bed\u8a00\u7684API\u3002<\/p>\n

\u4e0eMySQL\u6570\u636e\u5e93\u4e0d\u540c\u7684\u662f\uff0cRedis\u7684\u6570\u636e\u662f\u5b58\u5728\u5185\u5b58\u4e2d\u7684\u3002\u5b83\u7684\u8bfb\u5199\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u6bcf\u79d2\u53ef\u4ee5\u5904\u7406\u8d85\u8fc710\u4e07\u6b21\u8bfb\u5199\u64cd\u4f5c\u3002\u56e0\u6b64redis\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7f13\u5b58\uff0c\u53e6\u5916\uff0cRedis\u4e5f\u7ecf\u5e38\u7528\u6765\u505a\u5206\u5e03\u5f0f\u9501\u3002\u9664\u6b64\u4e4b\u5916\uff0cRedis\u652f\u6301\u4e8b\u52a1\u3001\u6301\u4e45\u5316\u3001LUA \u811a\u672c\u3001LRU \u9a71\u52a8\u4e8b\u4ef6\u3001\u591a\u79cd\u96c6\u7fa4\u65b9\u6848\u3002<\/p>\n

\u77e5\u9053redis\u662f\u4ec0\u4e48\u540e\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u8bf4\u4e00\u8bf4redis\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5feb\u3002<\/p>\n

2\u3001redis\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u5feb\uff1f<\/h2>\n

<\/p>\n

\u6211\u4eec\u6765\u4e00\u4e2a\u4e00\u4e2a\u8bf4\u660e\uff01<\/p>\n

\u57fa\u4e8e\u5185\u5b58\u5b58\u50a8\u5b9e\u73b0<\/h3>\n

\u8ba1\u7b97\u673a\u4e13\u4e1a\u7684\u540c\u5b66\u6211\u4eec\u90fd\u77e5\u9053\u5185\u5b58\u8bfb\u5199\u662f\u8981\u6bd4\u78c1\u76d8\u5feb\u5f88\u591a\u7684\uff0cRedis\u662f\u57fa\u4e8e\u5185\u5b58\u5b9e\u73b0\u7684\u6570\u636e\u5e93\uff0c\u76f8\u5bf9\u4e8e\u6570\u636e\u5b58\u5728\u78c1\u76d8\u7684mysql\u7b49\u6570\u636e\u5e93\uff0c\u7701\u53bb\u4e86\u78c1\u76d8I\/O\u7684\u6d88\u8017\u3002<\/p>\n

\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784<\/h3>\n

\u6211\u4eec\u90fd\u77e5\u9053\uff0cmysql\u7d22\u5f15\u4e3a\u4e86\u63d0\u9ad8\u6548\u7387\uff0c\u9009\u62e9\u4e86B+\u6811\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u5e94\u7528\u573a\u666f\u6765\u8bf4\u5408\u7406\u7684\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u8ba9\u4f60\u7684\u5e94\u7528\u6216\u8005\u7a0b\u5e8f\u66f4\u5feb\u3002\u6211\u4eec\u6765\u770b\u770bRedis\u7684\u6570\u636e\u7ed3\u6784\u2013\u5185\u90e8\u7f16\u7801\u56fe\uff1a<\/p>\n

<\/p>\n

String <\/code>\uff1a \u52a8\u6001\u5b57\u7b26\u4e32SDS
List<\/code>: \u53cc\u7aef\u94fe\u8868LinkedList+\u538b\u7f29\u94fe\u8868ziplist
Hash<\/code>: \u538b\u7f29\u94fe\u8868ziplist+\u5b57\u5178\u54c8\u5e0c\u8868hashtable
Set<\/code>: hashtable(+inset)
Zset<\/code>: \u538b\u7f29\u94fe\u8868ziplist+\u8df3\u8868skiplist<\/p>\n

\u6211\u4eec\u6765\u8bf4\u4e00\u8bf4\u8fd9\u51e0\u79cd\u5185\u90e8\u7f16\u7801\uff1a<\/p>\n

1\u3001SDS\u7b80\u5355\u52a8\u6001\u5b57\u7b26\u4e32<\/h4>\n


\u6211\u4eec\u6765\u548cC\u8bed\u8a00\u4e2d\u7684char[ ]\u5bf9\u6bd4\u4e0b<\/p>\n

\u5b57\u7b26\u4e32\u957f\u5ea6\u5904\u7406\uff1a Redis\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff081\uff09\uff0c\u800cC\u8bed\u8a00\u4e2d\uff0c\u9700\u8981\u4ece\u5934\u904d\u5386\uff0c\u590d\u6742\u5ea6\u4e3aO\uff08N\uff09\u3002<\/p>\n

\u7a7a\u95f4\u9884\u5206\u914d\uff1a \u5b57\u7b26\u4e32\u4fee\u6539\u8d8a\u9891\u7e41\u7684\u8bdd\uff0c\u5185\u5b58\u5206\u914d\u5c31\u8d8a\u9891\u7e41\uff0c\u5c31\u4f1a\u5f88\u6d88\u8d39\u6027\u80fd\uff0c\u800cSDS\u4fee\u6539\u548c\u7a7a\u95f4\u6269\u5145\uff0c\u4f1a\u989d\u5916\u5206\u914d\u672a\u4f7f\u7528\u7684\u7a7a\u95f4\uff0c\u51cf\u5c11\u6027\u80fd\u635f\u8017\u3002<\/p>\n

\u60f0\u6027\u7a7a\u95f4\u91ca\u653e\uff1a SDS\u7f29\u77ed\u65f6\uff0c\u4e0d\u662f\u56de\u6536\u591a\u4f59\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u800c\u662ffree\u8bb0\u5f55\u4e0b\u591a\u4f59\u7684\u7a7a\u95f4\uff0c\u540e\u7eed\u6709\u53d8\u66f4\uff0c\u76f4\u63a5\u4f7f\u7528free\u4e2d\u8bb0\u5f55\u7684\u7a7a\u95f4\uff0c\u51cf\u5c11\u5206\u914d\u3002<\/p>\n

\u4e8c\u8fdb\u5236\u5b89\u5168\uff1a Redis\u53ef\u4ee5\u5b58\u50a8\u4e00\u4e9b\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5728C\u8bed\u8a00\u4e2d\u5b57\u7b26\u4e32\u9047\u5230’\/0’\u4f1a\u7ed3\u675f\uff0c\u800cSDS\u4e2d\u6807\u5fd7\u5b57\u7b26\u4e32\u7ed3\u675f\u7684\u662flen\u5c5e\u6027\u3002<\/p>\n

2\u3001\u5b57\u5178<\/h4>\n

Redis \u4f5c\u4e3a K-V \u578b\u5185\u5b58\u6570\u636e\u5e93\uff0c\u6240\u6709\u7684\u952e\u503c\u5c31\u662f\u7528\u5b57\u5178\u6765\u5b58\u50a8\u3002\u5b57\u5178\u5c31\u662f\u54c8\u5e0c\u8868\uff0c\u6bd4\u5982HashMap\uff0c\u901a\u8fc7key\u5c31\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5230\u5bf9\u5e94\u7684value\u3002\u800c\u54c8\u5e0c\u8868\u7684\u7279\u6027\uff0c\u5728O\uff081\uff09\u65f6\u95f4\u590d\u6742\u5ea6\u5c31\u53ef\u4ee5\u83b7\u5f97\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n

3\u3001\u8df3\u8868
<\/h4>\n

<\/p>\n

\u8df3\u8868\u662fRedis\u7279\u6709\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5c31\u662f\u5728\u94fe\u8868\u7684\u57fa\u7840\u4e0a\uff0c\u589e\u52a0\u591a\u7ea7\u7d22\u5f15\u63d0\u5347\u67e5\u627e\u6548\u7387\u3002
\u8df3\u8868\u652f\u6301\u5e73\u5747O\uff08logN\uff09,\u6700\u574fO\uff08N\uff09\u590d\u6742\u5ea6\u7684\u8282\u70b9\u67e5\u627e\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u987a\u5e8f\u6027\u64cd\u4f5c\u3002<\/p>\n

\u5408\u7406\u7684\u6570\u636e\u7f16\u7801<\/h3>\n

Redis \u652f\u6301\u591a\u79cd\u6570\u636e\u6570\u636e\u7c7b\u578b\uff0c\u6bcf\u79cd\u57fa\u672c\u7c7b\u578b\uff0c\u53ef\u80fd\u5bf9\u591a\u79cd\u6570\u636e\u7ed3\u6784\u3002\u4ec0\u4e48\u65f6\u5019,\u4f7f\u7528\u4ec0\u4e48\u6837\u6570\u636e\u7ed3\u6784\uff0c\u4f7f\u7528\u4ec0\u4e48\u6837\u7f16\u7801\uff0c\u662fredis\u8bbe\u8ba1\u8005\u603b\u7ed3\u4f18\u5316\u7684\u7ed3\u679c\u3002<\/p>\n

String\uff1a \u5982\u679c\u5b58\u50a8\u6570\u5b57\u7684\u8bdd\uff0c\u662f\u7528int\u7c7b\u578b\u7684\u7f16\u7801;\u5982\u679c\u5b58\u50a8\u975e\u6570\u5b57\uff0c\u5c0f\u4e8e\u7b49\u4e8e39\u5b57\u8282\u7684\u5b57\u7b26\u4e32\uff0c\u662fembstr\uff1b\u5927\u4e8e39\u4e2a\u5b57\u8282\uff0c\u5219\u662fraw\u7f16\u7801\u3002
List\uff1a \u5982\u679c\u5217\u8868\u7684\u5143\u7d20\u4e2a\u6570\u5c0f\u4e8e512\u4e2a\uff0c\u5217\u8868\u6bcf\u4e2a\u5143\u7d20\u7684\u503c\u90fd\u5c0f\u4e8e64\u5b57\u8282\uff08\u9ed8\u8ba4\uff09\uff0c\u4f7f\u7528ziplist\u7f16\u7801\uff0c\u5426\u5219\u4f7f\u7528linkedlist\u7f16\u7801
Hash\uff1a \u54c8\u5e0c\u7c7b\u578b\u5143\u7d20\u4e2a\u6570\u5c0f\u4e8e512\u4e2a\uff0c\u6240\u6709\u503c\u5c0f\u4e8e64\u5b57\u8282\u7684\u8bdd\uff0c\u4f7f\u7528ziplist\u7f16\u7801,\u5426\u5219\u4f7f\u7528hashtable\u7f16\u7801\u3002
Set\uff1a \u5982\u679c\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u90fd\u662f\u6574\u6570\u4e14\u5143\u7d20\u4e2a\u6570\u5c0f\u4e8e512\u4e2a\uff0c\u4f7f\u7528intset\u7f16\u7801\uff0c\u5426\u5219\u4f7f\u7528hashtable\u7f16\u7801\u3002
Zset\uff1a \u5f53\u6709\u5e8f\u96c6\u5408\u7684\u5143\u7d20\u4e2a\u6570\u5c0f\u4e8e128\u4e2a\uff0c\u6bcf\u4e2a\u5143\u7d20\u7684\u503c\u5c0f\u4e8e64\u5b57\u8282\u65f6\uff0c\u4f7f\u7528ziplist\u7f16\u7801\uff0c\u5426\u5219\u4f7f\u7528skiplist\uff08\u8df3\u8dc3\u8868\uff09\u7f16\u7801\u3002<\/p>\n

\u5408\u7406\u7684\u7ebf\u7a0b\u6a21\u578b<\/h3>\n

1\u3001I\/O\u591a\u8def\u590d\u7528<\/h4>\n


\u591a\u8defI\/O\u590d\u7528\u6280\u672f\u53ef\u4ee5\u8ba9\u5355\u4e2a\u7ebf\u7a0b\u9ad8\u6548\u7684\u5904\u7406\u591a\u4e2a\u8fde\u63a5\u8bf7\u6c42\uff0c\u800cRedis\u4f7f\u7528\u7528epoll\u4f5c\u4e3aI\/O\u591a\u8def\u590d\u7528\u6280\u672f\u7684\u5b9e\u73b0\u3002\u5e76\u4e14\uff0cRedis\u81ea\u8eab\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u578b\u5c06epoll\u4e2d\u7684\u8fde\u63a5\u3001\u8bfb\u5199\u3001\u5173\u95ed\u90fd\u8f6c\u6362\u4e3a\u4e8b\u4ef6\uff0c\u4e0d\u5728\u7f51\u7edcI\/O\u4e0a\u6d6a\u8d39\u8fc7\u591a\u7684\u65f6\u95f4\u3002<\/p>\n

2\u3001\u4ec0\u4e48\u662fI\/O\u591a\u8def\u590d\u7528\uff1f<\/h4>\n

I\/O \uff1a \u7f51\u7edc I\/O
\u591a\u8def \uff1a \u591a\u4e2a\u7f51\u7edc\u8fde\u63a5
\u590d\u7528\uff1a \u590d\u7528\u540c\u4e00\u4e2a\u7ebf\u7a0b\u3002
IO\u591a\u8def\u590d\u7528\u5176\u5b9e\u5c31\u662f\u4e00\u79cd\u540c\u6b65IO\u6a21\u578b\uff0c\u5b83\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u76d1\u89c6\u591a\u4e2a\u6587\u4ef6\u53e5\u67c4\uff1b\u4e00\u65e6\u67d0\u4e2a\u6587\u4ef6\u53e5\u67c4\u5c31\u7eea\uff0c\u5c31\u80fd\u591f\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u76f8\u5e94\u7684\u8bfb\u5199\u64cd\u4f5c\uff1b\u800c\u6ca1\u6709\u6587\u4ef6\u53e5\u67c4\u5c31\u7eea\u65f6,\u5c31\u4f1a\u963b\u585e\u5e94\u7528\u7a0b\u5e8f\uff0c\u4ea4\u51facpu\u3002<\/p>\n

3\u3001\u5355\u7ebf\u7a0b\u6a21\u578b<\/h4>\n

Redis\u662f\u5355\u7ebf\u7a0b\u6a21\u578b\u7684\uff0c\u800c\u5355\u7ebf\u7a0b\u907f\u514d\u4e86CPU\u4e0d\u5fc5\u8981\u7684\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u7ade\u4e89\u9501\u7684\u6d88\u8017\u3002\u4e5f\u6b63\u56e0\u4e3a\u662f\u5355\u7ebf\u7a0b\uff0c\u5982\u679c\u67d0\u4e2a\u547d\u4ee4\u6267\u884c\u8fc7\u957f\uff08\u5982hgetall\u547d\u4ee4\uff09\uff0c\u4f1a\u9020\u6210\u963b\u585e\u3002Redis\u662f\u9762\u5411\u5feb\u901f\u6267\u884c\u573a\u666f\u7684\u6570\u636e\u5e93\u3002\uff0c\u6240\u4ee5\u8981\u614e\u7528\u5982smembers\u548clrange\u3001hgetall\u7b49\u547d\u4ee4\u3002<\/p>\n

Redis 6.0 \u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\u63d0\u901f\uff0c\u5b83\u7684\u6267\u884c\u547d\u4ee4\u64cd\u4f5c\u5185\u5b58\u7684\u4ecd\u7136\u662f\u4e2a\u5355\u7ebf\u7a0b\u3002<\/p>\n

\u865a\u62df\u5185\u5b58\u673a\u5236<\/h2>\n

redis\u76f4\u63a5\u81ea\u5df1\u6784\u5efa\u4e86VM\u673a\u5236\uff0c\u4e0d\u4f1a\u50cf\u4e00\u822c\u7684\u7cfb\u7edf\u4f1a\u8c03\u7528\u7cfb\u7edf\u51fd\u6570\u5904\u7406\uff0c\u4f1a\u6d6a\u8d39\u4e00\u5b9a\u7684\u65f6\u95f4\u53bb\u79fb\u52a8\u548c\u8bf7\u6c42\u3002<\/p>\n

Redis\u7684\u865a\u62df\u5185\u5b58\u673a\u5236\u662f\u5565\u5462\uff1f<\/h3>\n

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