{"id":88047,"date":"2026-07-31T12:33:15","date_gmt":"2026-07-31T04:33:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/88047.html"},"modified":"2026-07-31T12:33:15","modified_gmt":"2026-07-31T04:33:15","slug":"%e5%8d%81%e4%b8%83%e3%80%81redis-%e6%a0%b8%e5%bf%83%e5%8e%9f%e7%90%86%e4%b8%8e%e6%9e%b6%e6%9e%84%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/88047.html","title":{"rendered":"\u5341\u4e03\u3001Redis \u6838\u5fc3\u539f\u7406\u4e0e\u67b6\u6784\u8be6\u89e3"},"content":{"rendered":"

Redis \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u3001\u57fa\u4e8e\u5185\u5b58\u7684\u9ad8\u6027\u80fd\u952e\u503c\u5b58\u50a8\u6570\u636e\u5e93，\u652f\u6301\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\u7c7b\u578b，\u5355\u8282\u70b9 QPS \u53ef\u8fbe 10 \u4e07+，\u8bfb\u5199\u5ef6\u8fdf\u4f4e\u81f3\u4e9a\u6beb\u79d2\u7ea7\u522b\u3002\u672c\u6587\u4ece Redis \u7684\u6838\u5fc3\u67b6\u6784\u3001\u6570\u636e\u7ed3\u6784\u3001\u6301\u4e45\u5316\u673a\u5236\u3001\u5185\u5b58\u7ba1\u7406\u3001\u9ad8\u53ef\u7528\u65b9\u6848\u7b49\u7ef4\u5ea6\u8fdb\u884c\u7cfb\u7edf\u6027\u7684\u6df1\u5ea6\u5256\u6790\u3002<\/p>\n

\n

\u4e00\u3001Redis \u6982\u8ff0<\/h3>\n

1.1 \u4ec0\u4e48\u662f Redis<\/h4>\n

Redis（Remote Dictionary Server）\u662f\u4e00\u4e2a\u57fa\u4e8e\u5185\u5b58\u7684\u952e\u503c\u5b58\u50a8\u7cfb\u7edf，\u7531 Salvatore Sanfilippo（antirez）\u4e8e 2009 \u5e74\u4f7f\u7528 C \u8bed\u8a00\u7f16\u5199\u3002\u5b83\u5c5e\u4e8e NoSQL \u6570\u636e\u5e93\u4e2d\u7684\u952e\u503c\u5b58\u50a8\u7c7b，\u4f46\u8fdc\u4e0d\u6b62\u662f\u4e00\u4e2a\u7b80\u5355\u7684 KV \u7f13\u5b58\u2014\u2014Redis \u63d0\u4f9b\u4e86 String\u3001List\u3001Hash\u3001Set\u3001ZSet\u3001Stream\u3001JSON\u3001Bitmap\u3001HyperLogLog\u3001Geospatial \u7b49\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784，\u4f7f\u5176\u53ef\u4ee5\u540c\u65f6\u4f5c\u4e3a\u6570\u636e\u5e93\u3001\u7f13\u5b58\u3001\u6d88\u606f\u4e2d\u95f4\u4ef6\u548c\u6d41\u5f0f\u5f15\u64ce\u4f7f\u7528\u3002<\/p>\n

1.2 Redis \u7684\u6838\u5fc3\u5b9a\u4f4d<\/h4>\n\n\u5b9a\u4f4d\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n
\u5185\u5b58\u6570\u636e\u5e93<\/td>\n\u6240\u6709\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d，\u63d0\u4f9b\u4e9a\u6beb\u79d2\u7ea7\u8bfb\u5199\u5ef6\u8fdf<\/td>\n<\/tr>\n
\u7f13\u5b58\u5f15\u64ce<\/td>\n\u4f5c\u4e3a\u5173\u7cfb\u6570\u636e\u5e93\u524d\u7684\u7f13\u5b58\u5c42，\u5927\u5e45\u964d\u4f4e DB \u538b\u529b<\/td>\n<\/tr>\n
\u6d88\u606f\u4e2d\u95f4\u4ef6<\/td>\n\u652f\u6301 Pub\/Sub \u53d1\u5e03\u8ba2\u9605\u548c Stream \u6d88\u606f\u6d41<\/td>\n<\/tr>\n
\u6d41\u5f0f\u5f15\u64ce<\/td>\nStream \u6570\u636e\u7c7b\u578b\u652f\u6301\u6d88\u606f\u6301\u4e45\u5316\u3001\u6d88\u8d39\u7ec4\u548c ACK \u673a\u5236<\/td>\n<\/tr>\n
\u5411\u91cf\u6570\u636e\u5e93<\/td>\nRedis 7.4+ \u652f\u6301\u5411\u91cf\u96c6（Vector Sets），\u53ef\u7528\u4e8e\u8bed\u4e49\u641c\u7d22\u548c RAG<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

1.3 Redis \u4e3a\u4ec0\u4e48\u5feb<\/h4>\n

Redis \u7684\u9ad8\u6027\u80fd\u662f\u4e94\u4e2a\u5c42\u9762\u534f\u540c\u4f5c\u7528\u7684\u7ed3\u679c：<\/p>\n\n\u5c42\u9762\u6838\u5fc3\u673a\u5236\u5bf9\u6027\u80fd\u7684\u8d21\u732e<\/tr>\n\n\n\n\n\n\n
\u5b58\u50a8\u4ecb\u8d28<\/td>\n\u7eaf\u5185\u5b58\u64cd\u4f5c<\/td>\n\u6d88\u9664\u78c1\u76d8 IO \u74f6\u9888，\u5ef6\u8fdf\u4ece ms \u7ea7\u964d\u5230 \u03bcs \u7ea7<\/td>\n<\/tr>\n
\u6570\u636e\u7ed3\u6784<\/td>\n\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u5e95\u5c42\u7f16\u7801<\/td>\n\u540c\u4e00 API \u6839\u636e\u6570\u636e\u89c4\u6a21\u81ea\u52a8\u5207\u6362\u6700\u4f18\u7f16\u7801<\/td>\n<\/tr>\n
IO \u6a21\u578b<\/td>\nepoll \u591a\u8def\u590d\u7528<\/td>\n\u5355\u7ebf\u7a0b\u5904\u7406\u6570\u4e07\u5e76\u53d1\u8fde\u63a5，\u907f\u514d\u7ebf\u6027\u626b\u63cf<\/td>\n<\/tr>\n
\u7ebf\u7a0b\u6a21\u578b<\/td>\n\u6838\u5fc3\u5355\u7ebf\u7a0b<\/td>\n\u65e0\u9501\u8bbe\u8ba1，\u6d88\u9664\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u7ade\u4e89\u5f00\u9500<\/td>\n<\/tr>\n
\u534f\u8bae\u8bbe\u8ba1<\/td>\nRESP \u534f\u8bae<\/td>\n\u6587\u672c\u534f\u8bae\u89e3\u6790\u5feb\u901f，\u652f\u6301 Pipeline \u6279\u91cf\u64cd\u4f5c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e8c\u3001Redis \u6838\u5fc3\u67b6\u6784<\/h3>\n

2.1 \u6574\u4f53\u67b6\u6784\u5206\u5c42<\/h4>\n

Redis \u7684\u67b6\u6784\u53ef\u4ee5\u5206\u4e3a\u56db\u5c42：<\/p>\n

\u5ba2\u6237\u7aef\u5c42：\u5ba2\u6237\u7aef\u901a\u8fc7 RESP（Redis Serialization Protocol）\u534f\u8bae\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\u3002RESP \u662f\u4e00\u79cd\u6587\u672c\u534f\u8bae，\u683c\u5f0f\u7b80\u5355\u3001\u89e3\u6790\u5feb\u901f，\u652f\u6301\u4e94\u79cd\u6570\u636e\u7c7b\u578b：\u7b80\u5355\u5b57\u7b26\u4e32（+）\u3001\u9519\u8bef（-）\u3001\u6574\u6570（:）\u3001\u6279\u91cf\u5b57\u7b26\u4e32（$）\u548c\u6570\u7ec4（*）\u3002<\/p>\n

\u7f51\u7edc\u5c42：Redis \u4f7f\u7528\u57fa\u4e8e epoll \u7684 IO \u591a\u8def\u590d\u7528\u6a21\u578b，\u5355\u7ebf\u7a0b\u5373\u53ef\u5904\u7406\u6570\u4e07\u4e2a\u5e76\u53d1\u8fde\u63a5\u3002\u6838\u5fc3\u7ec4\u4ef6 aeEventLoop \u8d1f\u8d23\u76d1\u542c\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e8b\u4ef6（\u53ef\u8bfb\/\u53ef\u5199\/\u8d85\u65f6），\u5e76\u5c06\u4e8b\u4ef6\u5206\u53d1\u7ed9\u5bf9\u5e94\u7684\u5904\u7406\u5668\u3002<\/p>\n

\u6838\u5fc3\u5c42：\u5305\u542b\u547d\u4ee4\u5904\u7406\u5668\u3001\u6570\u636e\u5e93\u5b57\u5178\u3001\u8fc7\u671f\u5b57\u5178\u548c\u5185\u5b58\u5206\u914d\u5668\u3002\u6bcf\u4e2a Redis \u5b9e\u4f8b\u9ed8\u8ba4\u6709 16 \u4e2a\u6570\u636e\u5e93（\u7f16\u53f7 0-15），\u6bcf\u4e2a\u6570\u636e\u5e93\u7ef4\u62a4\u4e24\u4e2a\u5b57\u5178：<\/p>\n

    \n
  • \u952e\u7a7a\u95f4\u5b57\u5178（key space dict）：\u5b58\u50a8\u6240\u6709\u952e\u503c\u5bf9，key \u4e3a\u5b57\u7b26\u4e32，value \u4e3a redisObject<\/li>\n
  • \u8fc7\u671f\u5b57\u5178（expires dict）：\u5b58\u50a8\u952e\u7684\u8fc7\u671f\u65f6\u95f4\u6233，key \u6307\u5411\u952e\u7a7a\u95f4\u4e2d\u7684\u540c\u4e00\u4e2a\u952e，value \u4e3a Unix \u65f6\u95f4\u6233<\/li>\n<\/ul>\n

    \u6301\u4e45\u5316\u5c42：RDB \u5feb\u7167\u548c AOF \u65e5\u5fd7\u4e24\u79cd\u673a\u5236\u786e\u4fdd\u6570\u636e\u6301\u4e45\u6027\u3002<\/p>\n

    2.2 \u5355\u7ebf\u7a0b\u6a21\u578b\u89e3\u6790<\/h4>\n

    Redis \u7684\u6838\u5fc3\u547d\u4ee4\u5904\u7406\u662f\u5355\u7ebf\u7a0b\u7684（Redis 6.0 \u4e4b\u524d\u5b8c\u5168\u5355\u7ebf\u7a0b，6.0 \u5f15\u5165\u591a\u7ebf\u7a0b\u4ec5\u7528\u4e8e\u7f51\u7edc IO \u89e3\u6790）：<\/p>\n

    \u250c\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
    \n\u2502 Redis \u4e8b\u4ef6\u5faa\u73af \u2502
    \n\u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
    \n\u2502 \u2502 \u6587\u4ef6\u4e8b\u4ef6 \u2502 \u2502 \u65f6\u95f4\u4e8b\u4ef6 \u2502 \u2502 \u547d\u4ee4\u6267\u884c\u5668 \u2502 \u2502
    \n\u2502 \u2502 (epoll) \u2502 \u2502(serverCron)\u2502 \u2502 (processCmd)\u2502 \u2502
    \n\u2502 \u2514\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
    \n\u2502 \u2502 \u2502 \u2502 \u2502
    \n\u2502 \u8bfb\u5199\u5ba2\u6237\u7aef\u6570\u636e \u5b9a\u65f6\u4efb\u52a1\u8c03\u5ea6 \u6267\u884c\u5177\u4f53\u547d\u4ee4 \u2502
    \n\u2502 \u534f\u8bae\u89e3\u6790\/\u7f16\u7801 \u8fc7\u671fkey\u6e05\u7406 \u6570\u636e\u64cd\u4f5c \u2502
    \n\u2502 \u590d\u5236\u540c\u6b65 AOF\u91cd\u5199\u89e6\u53d1 \u6301\u4e45\u5316 \u2502
    \n\u2514\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

    \u4e3a\u4ec0\u4e48\u5355\u7ebf\u7a0b\u8fd8\u8fd9\u4e48\u5feb？<\/p>\n

  • \u7eaf\u5185\u5b58\u64cd\u4f5c：\u6240\u6709\u64cd\u4f5c\u90fd\u5728\u5185\u5b58\u4e2d\u5b8c\u6210，CPU \u662f\u552f\u4e00\u7684\u6027\u80fd\u74f6\u9888，\u5355\u7ebf\u7a0b\u907f\u514d\u4e86\u591a\u7ebf\u7a0b\u7684\u9501\u7ade\u4e89\u548c\u4e0a\u4e0b\u6587\u5207\u6362<\/li>\n
  • \u9ad8\u6548\u6570\u636e\u7ed3\u6784：\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u8df3\u8868\u3001\u538b\u7f29\u5217\u8868\u3001\u54c8\u5e0c\u8868\u7b49，\u4fdd\u8bc1\u64cd\u4f5c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1) \u6216 O(logN)<\/li>\n
  • IO \u591a\u8def\u590d\u7528：epoll \u673a\u5236\u4f7f\u5355\u7ebf\u7a0b\u80fd\u540c\u65f6\u76d1\u542c\u6570\u5343\u4e2a\u8fde\u63a5\u7684 IO \u4e8b\u4ef6<\/li>\n
  • RESP \u534f\u8bae\u7b80\u5355：\u6587\u672c\u534f\u8bae\u89e3\u6790\u5f00\u9500\u6781\u4f4e<\/li>\n
  • Pipeline \u652f\u6301：\u5ba2\u6237\u7aef\u53ef\u4ee5\u6279\u91cf\u53d1\u9001\u547d\u4ee4，\u51cf\u5c11\u7f51\u7edc RTT<\/li>\n

    Redis 6.0 \u591a\u7ebf\u7a0b\u6539\u52a8：Redis 6.0 \u5f15\u5165\u4e86\u591a\u7ebf\u7a0b\u7f51\u7edc IO（\u9ed8\u8ba4\u5173\u95ed），\u5c06\u534f\u8bae\u89e3\u6790\u548c\u54cd\u5e94\u7f16\u7801\u4ece\u4e3b\u7ebf\u7a0b\u5378\u8f7d\u5230 IO \u7ebf\u7a0b，\u4f46\u547d\u4ee4\u6267\u884c\u4ecd\u7136\u662f\u5355\u7ebf\u7a0b\u7684，\u4fdd\u8bc1\u539f\u5b50\u6027\u4e0d\u53d8\u3002<\/p>\n

    2.3 RESP \u534f\u8bae<\/h4>\n

    RESP \u534f\u8bae\u662f Redis \u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u901a\u4fe1\u7684\u57fa\u7840：<\/p>\n

    # \u5ba2\u6237\u7aef\u8bf7\u6c42（RESP \u6570\u7ec4\u683c\u5f0f）
    \n*3\\\\r\\\\n$3\\\\r\\\\nSET\\\\r\\\\n$5\\\\r\\\\nmykey\\\\r\\\\n$7\\\\r\\\\nmyvalue\\\\r\\\\n<\/p>\n

    # \u670d\u52a1\u7aef\u54cd\u5e94
    \n+OK\\\\r\\\\n # \u7b80\u5355\u5b57\u7b26\u4e32
    \n-Error message\\\\r\\\\n # \u9519\u8bef
    \n:1000\\\\r\\\\n # \u6574\u6570
    \n$5\\\\r\\\\nhello\\\\r\\\\n # \u6279\u91cf\u5b57\u7b26\u4e32
    \n*2\\\\r\\\\n$3\\\\r\\\\nfoo\\\\r\\\\n$3\\\\r\\\\nbar\\\\r\\\\n # \u6570\u7ec4<\/p>\n

    # RESP3 \u65b0\u589e\u7c7b\u578b（Redis 6.0+）
    \n%2\\\\r\\\\n # Map \u7c7b\u578b
    \n~3\\\\r\\\\n # Set \u7c7b\u578b
    \n=15\\\\r\\\\n…txt\\\\r\\\\n # Verbatim \u5b57\u7b26\u4e32<\/p>\n

    \n

    \u4e09\u3001Redis \u6570\u636e\u7ed3\u6784<\/h3>\n

    3.1 \u4e24\u5c42\u67b6\u6784\u8bbe\u8ba1<\/h4>\n

    Redis \u6700\u7cbe\u5999\u7684\u8bbe\u8ba1\u4e4b\u4e00\u662f"\u4e24\u5c42\u67b6\u6784"\u2014\u2014\u5bf9\u5916\u66b4\u9732 5 \u79cd\u6838\u5fc3\u903b\u8f91\u6570\u636e\u7c7b\u578b，\u5e95\u5c42\u6839\u636e\u6570\u636e\u91cf\u548c\u5143\u7d20\u5927\u5c0f\u81ea\u52a8\u9009\u62e9\u6700\u4f18\u7684\u7269\u7406\u7f16\u7801\u3002\u8fd9\u4e24\u5c42\u901a\u8fc7 redisObject \u7ed3\u6784\u4f53\u6865\u63a5：<\/p>\n

    typedef<\/span> struct<\/span> redisObject<\/span> {<\/span>
    \n unsigned<\/span> type:<\/span>4<\/span>;<\/span> \/\/ \u903b\u8f91\u7c7b\u578b（STRING\/LIST\/HASH\/SET\/ZSET）<\/span>
    \n unsigned<\/span> encoding:<\/span>4<\/span>;<\/span> \/\/ \u7269\u7406\u7f16\u7801（int\/embstr\/raw\/hashtable\/skiplist…）<\/span>
    \n unsigned<\/span> lru:<\/span>24<\/span>;<\/span> \/\/ LRU \u6dd8\u6c70\u4fe1\u606f（\u9ad816\u4f4d\u4e3a\u65f6\u95f4，\u4f4e8\u4f4d\u4e3a\u9891\u7387）<\/span>
    \n int<\/span> refcount;<\/span> \/\/ \u5f15\u7528\u8ba1\u6570<\/span>
    \n void<\/span> *<\/span>ptr;<\/span> \/\/ \u6307\u5411\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u7684\u6307\u9488<\/span>
    \n}<\/span> robj;<\/span><\/p>\n

    3.2 \u903b\u8f91\u7c7b\u578b\u4e0e\u7269\u7406\u7f16\u7801\u6620\u5c04<\/h4>\n\n\u903b\u8f91\u7c7b\u578b\u5e95\u5c42\u7269\u7406\u7f16\u7801\u5207\u6362\u6761\u4ef6（Redis 7.x \u9ed8\u8ba4）<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    String<\/td>\nint<\/td>\n\u503c\u4e3a 64 \u4f4d\u6574\u6570<\/td>\n<\/tr>\n
    <\/td>\nembstr<\/td>\n\u5b57\u7b26\u4e32\u957f\u5ea6 \u2264 44 \u5b57\u8282<\/td>\n<\/tr>\n
    <\/td>\nraw（SDS）<\/td>\n\u5b57\u7b26\u4e32\u957f\u5ea6 > 44 \u5b57\u8282<\/td>\n<\/tr>\n
    List<\/td>\nlistpack<\/td>\n\u5143\u7d20\u6570 \u2264 128 \u4e14\u6bcf\u4e2a\u5143\u7d20 \u2264 64 \u5b57\u8282<\/td>\n<\/tr>\n
    <\/td>\nquicklist<\/td>\n\u8d85\u51fa\u4e0a\u8ff0\u9608\u503c<\/td>\n<\/tr>\n
    Hash<\/td>\nlistpack<\/td>\n\u952e\u503c\u5bf9\u6570 \u2264 128 \u4e14\u6bcf\u4e2a\u503c \u2264 64 \u5b57\u8282<\/td>\n<\/tr>\n
    <\/td>\nhashtable<\/td>\n\u8d85\u51fa\u4e0a\u8ff0\u9608\u503c<\/td>\n<\/tr>\n
    Set<\/td>\nintset<\/td>\n\u6240\u6709\u5143\u7d20\u5747\u4e3a\u6574\u6570\u4e14\u5143\u7d20\u6570 \u2264 512<\/td>\n<\/tr>\n
    <\/td>\nlistpack<\/td>\n\u5143\u7d20\u6570 \u2264 128 \u4e14\u6bcf\u4e2a\u5143\u7d20 \u2264 64 \u5b57\u8282<\/td>\n<\/tr>\n
    <\/td>\nhashtable<\/td>\n\u8d85\u51fa\u4e0a\u8ff0\u9608\u503c<\/td>\n<\/tr>\n
    ZSet<\/td>\nlistpack<\/td>\n\u5143\u7d20\u6570 \u2264 128 \u4e14\u6bcf\u4e2a\u5143\u7d20 \u2264 64 \u5b57\u8282<\/td>\n<\/tr>\n
    <\/td>\nskiplist + hashtable<\/td>\n\u8d85\u51fa\u4e0a\u8ff0\u9608\u503c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4ee5\u4e0a\u9608\u503c\u5747\u53ef\u901a\u8fc7\u914d\u7f6e\u8c03\u6574，\u5982 list-max-listpack-size\u3001set-max-listpack-entries \u7b49\u3002<\/p>\n

    3.3 \u6838\u5fc3\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u8be6\u89e3<\/h4>\n

    3.3.1 SDS（Simple Dynamic String）\u7b80\u5355\u52a8\u6001\u5b57\u7b26\u4e32<\/h5>\n

    Redis \u6ca1\u6709\u4f7f\u7528 C \u8bed\u8a00\u539f\u751f\u5b57\u7b26\u4e32，\u800c\u662f\u81ea\u5df1\u5b9e\u73b0\u4e86 SDS：<\/p>\n

    struct<\/span> sdshdr<\/span> {<\/span>
    \n int<\/span> len;<\/span> \/\/ \u5df2\u4f7f\u7528\u957f\u5ea6<\/span>
    \n int<\/span> free;<\/span> \/\/ \u5269\u4f59\u53ef\u7528\u957f\u5ea6<\/span>
    \n char<\/span> buf[<\/span>]<\/span>;<\/span> \/\/ \u5b57\u7b26\u6570\u7ec4<\/span>
    \n}<\/span>;<\/span><\/p>\n

    \u76f8\u6bd4 C \u5b57\u7b26\u4e32\u7684\u4f18\u52bf：<\/p>\n\n\u7279\u6027C \u5b57\u7b26\u4e32SDS<\/tr>\n\n\n\n\n\n
    \u83b7\u53d6\u957f\u5ea6<\/td>\nO(N) \u9700\u904d\u5386<\/td>\nO(1) \u76f4\u63a5\u8bfb\u53d6 len \u5b57\u6bb5<\/td>\n<\/tr>\n
    \u4e8c\u8fdb\u5236\u5b89\u5168<\/td>\n\u4e0d\u5b89\u5168（\\\\0 \u4e3a\u7ec8\u6b62\u7b26）<\/td>\n\u5b89\u5168（\u7528 len \u5224\u65ad\u957f\u5ea6）<\/td>\n<\/tr>\n
    \u4fee\u6539\u8ffd\u52a0<\/td>\n\u53ef\u80fd\u6ea2\u51fa<\/td>\n\u81ea\u52a8\u6269\u5bb9（\u5148\u68c0\u67e5\u7a7a\u95f4\u4e0d\u8db3\u518d\u5206\u914d）<\/td>\n<\/tr>\n
    \u5185\u5b58\u5206\u914d<\/td>\n\u6bcf\u6b21\u4fee\u6539\u90fd\u91cd\u65b0\u5206\u914d<\/td>\n\u7a7a\u95f4\u9884\u5206\u914d + \u60f0\u6027\u91ca\u653e，\u51cf\u5c11\u5206\u914d\u6b21\u6570<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u6269\u5bb9\u7b56\u7565：<\/p>\n

      \n
    • \u4fee\u6539\u540e\u957f\u5ea6 < 1MB：\u5206\u914d 2 \u500d\u7a7a\u95f4 + 1 \u5b57\u8282<\/li>\n
    • \u4fee\u6539\u540e\u957f\u5ea6 \u2265 1MB：\u5206\u914d\u5f53\u524d\u957f\u5ea6 + 1MB + 1 \u5b57\u8282<\/li>\n<\/ul>\n
      3.3.2 \u8df3\u8868（Skip List）<\/h5>\n

      \u8df3\u8868\u662f ZSet \u5e95\u5c42\u7684\u6838\u5fc3\u6392\u5e8f\u5f15\u64ce，\u91c7\u7528"\u7a7a\u95f4\u6362\u65f6\u95f4"\u601d\u60f3，\u901a\u8fc7\u591a\u5c42\u7d22\u5f15\u5c06\u94fe\u8868 O(N) \u7684\u67e5\u627e\u4f18\u5316\u5230 O(logN)：<\/p>\n

      Level 3: 1 \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\u2500\u2500\u2500\u2500\u2500\u2500> 9
      \nLevel 2: 1 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> 4 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> 9
      \nLevel 1: 1 \u2500\u2500\u2500> 3 \u2500\u2500\u2500\u2500> 4 \u2500\u2500\u2500> 6 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> 9
      \nLevel 0: 1 -> 2 -> 3 -> 4 -> 5 -> 6 -> 7 -> 8 -> 9<\/p>\n

      \u67e5\u627e\u5143\u7d20 7 \u7684\u8def\u5f84：Level 3: 1 \u2192 9（9>7，\u4e0b\u964d）\u2192 Level 2: 1 \u2192 4 \u2192 9（9>7，\u4e0b\u964d）\u2192 Level 1: 4 \u2192 6 \u2192 9（9>7，\u4e0b\u964d）\u2192 Level 0: 6 \u2192 7（\u627e\u5230！），\u53ea\u8bbf\u95ee\u4e86 7 \u4e2a\u8282\u70b9\u3002<\/p>\n

      typedef<\/span> struct<\/span> zskiplistNode<\/span> {<\/span>
      \n sds ele;<\/span> \/\/ \u6210\u5458\u503c<\/span>
      \n double<\/span> score;<\/span> \/\/ \u6392\u5e8f\u5206\u6570<\/span>
      \n struct<\/span> zskiplistNode<\/span> *<\/span>backward;<\/span> \/\/ \u540e\u9000\u6307\u9488<\/span>
      \n struct<\/span> zskiplistLevel<\/span> {<\/span>
      \n struct<\/span> zskiplistNode<\/span> *<\/span>forward;<\/span> \/\/ \u524d\u8fdb\u6307\u9488<\/span>
      \n unsigned<\/span> long<\/span> span;<\/span> \/\/ \u8de8\u5ea6（\u7528\u4e8e\u6392\u540d\u8ba1\u7b97）<\/span>
      \n }<\/span> level[<\/span>]<\/span>;<\/span> \/\/ \u67d4\u6027\u6570\u7ec4，\u5c42\u6570\u968f\u673a<\/span>
      \n}<\/span> zskiplistNode;<\/span><\/p>\n

      \u4e3a\u4ec0\u4e48\u9009\u8df3\u8868\u4e0d\u9009\u7ea2\u9ed1\u6811？<\/p>\n\n\u7ef4\u5ea6\u8df3\u8868\u7ea2\u9ed1\u6811<\/tr>\n\n\n\n\n\n
      \u4ee3\u7801\u590d\u6742\u5ea6<\/td>\n\u7ea6 300 \u884c，\u5b9e\u73b0\u7b80\u5355<\/td>\n500+ \u884c，\u65cb\u8f6c\u64cd\u4f5c\u590d\u6742<\/td>\n<\/tr>\n
      \u8303\u56f4\u67e5\u8be2<\/td>\n\u627e\u5230\u8d77\u70b9\u540e\u6cbf\u94fe\u8868\u904d\u5386\u5373\u53ef<\/td>\n\u9700\u8981\u4e2d\u5e8f\u904d\u5386，\u5b9e\u73b0\u590d\u6742<\/td>\n<\/tr>\n
      \u5185\u5b58\u5f00\u9500<\/td>\n\u5e73\u5747\u6bcf\u4e2a\u8282\u70b9 1.33 \u4e2a\u6307\u9488（p=0.25）<\/td>\n\u56fa\u5b9a 3 \u4e2a\u6307\u9488<\/td>\n<\/tr>\n
      \u5e76\u53d1\u53cb\u597d<\/td>\n\u5c40\u90e8\u4fee\u6539\u4e0d\u5f71\u54cd\u5168\u5c40\u7ed3\u6784<\/td>\n\u65cb\u8f6c\u64cd\u4f5c\u5f71\u54cd\u5168\u5c40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      3.3.3 \u538b\u7f29\u5217\u8868（Ziplist \/ Listpack）<\/h5>\n

      \u538b\u7f29\u5217\u8868\u662f\u4e00\u6bb5\u8fde\u7eed\u5185\u5b58\u5757，\u53bb\u9664\u4e86\u6307\u9488\u5f00\u9500，\u901a\u8fc7\u6781\u81f4\u7d27\u51d1\u7684\u7f16\u7801\u65b9\u5f0f\u8282\u7701\u5185\u5b58：<\/p>\n

      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 zlbytes \u2502 zltail \u2502 zllen \u2502 entry1 \u2502 … \u2502
      \n\u2502 4 bytes \u2502 4 bytes \u2502 2 bytes \u2502 \u53d8\u957f\u7f16\u7801 \u2502 \u2502
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

        \n
      • zlbytes：\u6574\u4e2a\u5217\u8868\u5360\u7528\u7684\u5b57\u8282\u6570<\/li>\n
      • zltail：\u5c3e\u8282\u70b9\u7684\u504f\u79fb\u91cf，\u65b9\u4fbf\u4ece\u5c3e\u90e8\u904d\u5386<\/li>\n
      • zllen：\u8282\u70b9\u6570\u91cf<\/li>\n
      • entry：\u6bcf\u4e2a\u8282\u70b9\u5305\u542b prevlen（\u524d\u4e00\u8282\u70b9\u957f\u5ea6）+ encoding（\u7f16\u7801\u65b9\u5f0f）+ data（\u6570\u636e）<\/li>\n<\/ul>\n

        \u7f3a\u70b9：\u8fde\u9501\u66f4\u65b0\u95ee\u9898\u2014\u2014\u5f53\u63d2\u5165\/\u5220\u9664\u8282\u70b9\u5bfc\u81f4\u524d\u4e00\u8282\u70b9\u957f\u5ea6\u53d8\u5316\u65f6，\u540e\u7eed\u6240\u6709\u8282\u70b9\u7684 prevlen \u90fd\u9700\u8981\u91cd\u65b0\u7f16\u7801，\u6700\u574f\u60c5\u51b5 O(N)\u3002Redis 7.0 \u5f15\u5165 listpack \u66ff\u4ee3 ziplist，\u901a\u8fc7\u5728\u6bcf\u4e2a\u8282\u70b9\u4e2d\u8bb0\u5f55\u603b\u957f\u5ea6\u6765\u89e3\u51b3\u8fde\u9501\u66f4\u65b0\u95ee\u9898\u3002<\/p>\n

        3.3.4 \u6574\u6570\u96c6\u5408（IntSet）<\/h5>\n

        IntSet \u662f\u4e13\u95e8\u5b58\u50a8\u7eaf\u6574\u6570\u96c6\u5408\u7684\u7d27\u51d1\u7ed3\u6784：<\/p>\n

        typedef<\/span> struct<\/span> intset<\/span> {<\/span>
        \n uint32_t<\/span> encoding;<\/span> \/\/ \u7f16\u7801\u65b9\u5f0f（INTSET_ENC_INT16\/32\/64）<\/span>
        \n uint32_t<\/span> length;<\/span> \/\/ \u5143\u7d20\u4e2a\u6570<\/span>
        \n int8_t<\/span> contents[<\/span>]<\/span>;<\/span> \/\/ \u6709\u5e8f\u6574\u6570\u6570\u7ec4<\/span>
        \n}<\/span> intset;<\/span><\/p>\n

          \n
        • \u6240\u6709\u5143\u7d20\u5747\u4e3a\u6574\u6570\u65f6\u624d\u4f7f\u7528 intset<\/li>\n
        • \u5143\u7d20\u6309\u503c\u6392\u5e8f\u5b58\u50a8，\u652f\u6301\u4e8c\u5206\u67e5\u627e<\/li>\n
        • \u81ea\u52a8\u5347\u7ea7\u7f16\u7801：\u5f53\u63d2\u5165\u66f4\u5927\u8303\u56f4\u7684\u6574\u6570\u65f6，\u4ece int16 \u5347\u7ea7\u5230 int32 \u6216 int64<\/li>\n<\/ul>\n

          3.4 \u4e94\u79cd\u6838\u5fc3\u903b\u8f91\u7c7b\u578b\u8be6\u89e3<\/h4>\n

          3.4.1 String（\u5b57\u7b26\u4e32）<\/h5>\n

          String \u662f\u6700\u57fa\u7840\u4e5f\u662f\u6700\u7075\u6d3b\u7684\u7c7b\u578b，\u53ef\u4ee5\u5b58\u50a8\u5b57\u7b26\u4e32\u3001\u6574\u6570\u6216\u6d6e\u70b9\u6570：<\/p>\n

          # \u57fa\u672c\u64cd\u4f5c<\/span>
          \nSET user:1:name "\u5f20\u4e09"<\/span> # \u8bbe\u7f6e\u503c<\/span>
          \nGET user:1:name # \u83b7\u53d6\u503c \u2192 "\u5f20\u4e09"<\/span>
          \nINCR page:views # \u539f\u5b50\u9012\u589e（\u8ba1\u6570\u5668）<\/span>
          \nSET session:token "abc"<\/span> EX 3600<\/span> # \u8bbe\u7f6e\u503c\u5e76\u6307\u5b9a\u8fc7\u671f\u65f6\u95f4（\u79d2）<\/span>
          \nSETNX lock:order "1"<\/span> # \u4ec5\u5f53 key \u4e0d\u5b58\u5728\u65f6\u8bbe\u7f6e（\u5206\u5e03\u5f0f\u9501）<\/span><\/p>\n

          \u5178\u578b\u5e94\u7528：\u7f13\u5b58\u70ed\u70b9\u6570\u636e\u3001\u5206\u5e03\u5f0f\u9501\u3001\u8ba1\u6570\u5668\u3001Session \u5171\u4eab\u3001\u5206\u5e03\u5f0f ID \u751f\u6210<\/p>\n

          3.4.2 Hash（\u54c8\u5e0c）<\/h5>\n

          Hash \u9002\u5408\u5b58\u50a8\u5bf9\u8c61，\u4e00\u4e2a key \u6620\u5c04\u591a\u4e2a field-value：<\/p>\n

          # \u57fa\u672c\u64cd\u4f5c<\/span>
          \nHSET user:1 name "\u5f20\u4e09"<\/span> age 28<\/span> city "\u5317\u4eac"<\/span> # \u8bbe\u7f6e\u591a\u4e2a\u5b57\u6bb5<\/span>
          \nHGET user:1 name # \u83b7\u53d6\u5355\u4e2a\u5b57\u6bb5 \u2192 "\u5f20\u4e09"<\/span>
          \nHMGET user:1 name age city # \u83b7\u53d6\u591a\u4e2a\u5b57\u6bb5<\/span>
          \nHINCRBY user:1 age 1<\/span> # \u5b57\u6bb5\u503c\u539f\u5b50\u9012\u589e<\/span>
          \nHGETALL user:1 # \u83b7\u53d6\u6240\u6709\u5b57\u6bb5\u548c\u503c<\/span><\/p>\n

          vs String \u5b58 JSON：Hash \u53ef\u4ee5\u5355\u72ec\u83b7\u53d6\/\u4fee\u6539\u67d0\u4e2a\u5b57\u6bb5，\u65e0\u9700\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u6574\u4e2a\u5bf9\u8c61，\u5185\u5b58\u66f4\u7701（\u5c0f\u5bf9\u8c61\u7528 listpack \u7f16\u7801\u65f6\u5c24\u5176\u660e\u663e）\u3002<\/p>\n

          3.4.3 List（\u5217\u8868）<\/h5>\n

          List \u662f\u6709\u5e8f\u7684\u5143\u7d20\u96c6\u5408，\u5e95\u5c42\u7528\u53cc\u5411\u94fe\u8868\u6216 quicklist \u5b9e\u73b0：<\/p>\n

          # \u57fa\u672c\u64cd\u4f5c<\/span>
          \nLPUSH queue:task "task1"<\/span> "task2"<\/span> # \u4ece\u5de6\u4fa7\u538b\u5165<\/span>
          \nRPUSH queue:task "task3"<\/span> # \u4ece\u53f3\u4fa7\u538b\u5165<\/span>
          \nLPOP queue:task # \u4ece\u5de6\u4fa7\u5f39\u51fa \u2192 "task2"<\/span>
          \nRPOP queue:task # \u4ece\u53f3\u4fa7\u5f39\u51fa<\/span>
          \nLRANGE queue:task 0<\/span> -1<\/span> # \u83b7\u53d6\u6240\u6709\u5143\u7d20<\/span>
          \nBLPOP queue:task 30<\/span> # \u963b\u585e\u5f0f\u5f39\u51fa（\u8d85\u65f630\u79d2）<\/span><\/p>\n

          \u5178\u578b\u5e94\u7528：\u6d88\u606f\u961f\u5217\u3001\u6700\u65b0\u5217\u8868（Timeline）\u3001\u6587\u7ae0\u5217\u8868\u3001LRU \u6dd8\u6c70\u8fd1\u4f3c\u5b9e\u73b0<\/p>\n

          3.4.4 Set（\u96c6\u5408）<\/h5>\n

          Set \u662f\u65e0\u5e8f\u3001\u4e0d\u91cd\u590d\u7684\u5143\u7d20\u96c6\u5408，\u652f\u6301\u4ea4\u5e76\u5dee\u96c6\u8fd0\u7b97：<\/p>\n

          # \u57fa\u672c\u64cd\u4f5c<\/span>
          \nSADD tags:article:1 "Redis"<\/span> "\u7f13\u5b58"<\/span> "\u6570\u636e\u5e93"<\/span>
          \nSADD tags:article:2 "Redis"<\/span> "\u9ad8\u53ef\u7528"<\/span> "\u96c6\u7fa4"<\/span>
          \nSMEMBERS tags:article:1 # \u83b7\u53d6\u6240\u6709\u6210\u5458<\/span>
          \nSISMEMBER tags:article:1 "Redis"<\/span> # \u5224\u65ad\u662f\u5426\u5b58\u5728 \u2192 1<\/span>
          \nSINTER tags:article:1 tags:article:2 # \u4ea4\u96c6 \u2192 {"Redis"}<\/span>
          \nSUNION tags:article:1 tags:article:2 # \u5e76\u96c6 \u2192 {"Redis","\u7f13\u5b58","\u6570\u636e\u5e93","\u9ad8\u53ef\u7528","\u96c6\u7fa4"}<\/span>
          \nSDIFF tags:article:1 tags:article:2 # \u5dee\u96c6 \u2192 {"\u7f13\u5b58","\u6570\u636e\u5e93"}<\/span>
          \nSRANDMEMBER tags:article:1 2<\/span> # \u968f\u673a\u83b7\u53d62\u4e2a<\/span><\/p>\n

          \u5178\u578b\u5e94\u7528：\u6807\u7b7e\u7cfb\u7edf\u3001\u5171\u540c\u597d\u53cb\u3001\u62bd\u5956\u3001\u53bb\u91cd\u3001\u63a8\u8350（\u4ea4\u96c6\/\u5e76\u96c6\u8fd0\u7b97）<\/p>\n

          3.4.5 ZSet（\u6709\u5e8f\u96c6\u5408）<\/h5>\n

          ZSet \u5728 Set \u7684\u57fa\u7840\u4e0a\u4e3a\u6bcf\u4e2a\u5143\u7d20\u5173\u8054\u4e00\u4e2a score，\u6309 score \u6392\u5e8f：<\/p>\n

          # \u57fa\u672c\u64cd\u4f5c<\/span>
          \nZADD leaderboard 100<\/span> "player1"<\/span> 200<\/span> "player2"<\/span> 150<\/span> "player3"<\/span>
          \nZINCRBY leaderboard 50<\/span> "player1"<\/span> # player1 \u5206\u6570+50 \u2192 150<\/span>
          \nZRANGE leaderboard 0<\/span> -1<\/span> WITHSCORES # \u6309\u5206\u6570\u5347\u5e8f<\/span>
          \nZREVRANGE leaderboard 0<\/span> 2<\/span> WITHSCORES # \u6309\u5206\u6570\u964d\u5e8f，\u53d6\u524d3<\/span>
          \nZRANGEBYSCORE leaderboard 100<\/span> 200<\/span> # \u6309\u5206\u6570\u8303\u56f4\u67e5\u8be2<\/span>
          \nZRANK leaderboard "player1"<\/span> # \u83b7\u53d6\u6392\u540d（\u4ece0\u5f00\u59cb）<\/span>
          \nZCARD leaderboard # \u83b7\u53d6\u5143\u7d20\u6570\u91cf<\/span><\/p>\n

          \u5178\u578b\u5e94\u7528：\u6392\u884c\u699c\u3001\u5ef6\u8fdf\u961f\u5217（score \u4e3a\u6267\u884c\u65f6\u95f4）\u3001\u5e26\u6743\u91cd\u7684\u4efb\u52a1\u961f\u5217\u3001\u6ed1\u52a8\u7a97\u53e3\u9650\u6d41<\/p>\n

          \n

          \u56db\u3001Redis \u6301\u4e45\u5316\u673a\u5236<\/h3>\n

          4.1 RDB \u5feb\u7167（Redis Database）<\/h4>\n

          RDB \u662f Redis \u9ed8\u8ba4\u7684\u6301\u4e45\u5316\u65b9\u5f0f，\u5c06\u67d0\u4e00\u65f6\u523b\u7684\u5168\u91cf\u6570\u636e\u4ee5\u4e8c\u8fdb\u5236\u5feb\u7167\u7684\u5f62\u5f0f\u4fdd\u5b58\u5230\u78c1\u76d8：<\/p>\n

          \u89e6\u53d1\u65b9\u5f0f：<\/p>\n\n\u89e6\u53d1\u65b9\u5f0f\u914d\u7f6e\/\u547d\u4ee4\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n
          \u624b\u52a8\u89e6\u53d1<\/td>\nSAVE \/ BGSAVE<\/td>\nSAVE \u963b\u585e\u4e3b\u7ebf\u7a0b，BGSAVE fork \u5b50\u8fdb\u7a0b<\/td>\n<\/tr>\n
          \u914d\u7f6e\u89e6\u53d1<\/td>\nsave 900 1<\/td>\n900 \u79d2\u5185\u81f3\u5c11\u6709 1 \u6b21\u5199\u64cd\u4f5c\u5219\u89e6\u53d1<\/td>\n<\/tr>\n
          <\/td>\nsave 300 10<\/td>\n300 \u79d2\u5185\u81f3\u5c11\u6709 10 \u6b21\u5199\u64cd\u4f5c\u5219\u89e6\u53d1<\/td>\n<\/tr>\n
          <\/td>\nsave 60 10000<\/td>\n60 \u79d2\u5185\u81f3\u5c11\u6709 10000 \u6b21\u5199\u64cd\u4f5c\u5219\u89e6\u53d1<\/td>\n<\/tr>\n
          \u81ea\u52a8\u89e6\u53d1<\/td>\n\u4e3b\u4ece\u590d\u5236\u5168\u91cf\u540c\u6b65\u65f6<\/td>\n\u4e3b\u8282\u70b9\u81ea\u52a8\u751f\u6210 RDB \u53d1\u9001\u7ed9\u4ece\u8282\u70b9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          BGSAVE \u5de5\u4f5c\u6d41\u7a0b：<\/p>\n

          1. Redis \u4e3b\u8fdb\u7a0b fork \u4e00\u4e2a\u5b50\u8fdb\u7a0b
          \n2. \u5b50\u8fdb\u7a0b\u5c06\u5185\u5b58\u6570\u636e\u5199\u5165\u4e34\u65f6 RDB \u6587\u4ef6
          \n3. \u671f\u95f4\u4e3b\u8fdb\u7a0b\u7ee7\u7eed\u5904\u7406\u5ba2\u6237\u7aef\u8bf7\u6c42（\u5229\u7528 COW \u673a\u5236）
          \n4. \u5b50\u8fdb\u7a0b\u5b8c\u6210\u5199\u5165\u540e，\u7528\u4e34\u65f6\u6587\u4ef6\u66ff\u6362\u65e7 RDB \u6587\u4ef6
          \n5. \u7236\u8fdb\u7a0b\u6536\u5230\u5b50\u8fdb\u7a0b\u5b8c\u6210\u4fe1\u53f7<\/p>\n

          Copy-On-Write（COW）\u673a\u5236：fork \u65f6\u7236\u5b50\u8fdb\u7a0b\u5171\u4eab\u540c\u4e00\u7269\u7406\u5185\u5b58\u9875，\u5f53\u4e3b\u8fdb\u7a0b\u4fee\u6539\u67d0\u4e2a\u5185\u5b58\u9875\u65f6，\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u590d\u5236\u8be5\u9875\u7ed9\u4e3b\u8fdb\u7a0b，\u5b50\u8fdb\u7a0b\u4ecd\u6301\u6709\u539f\u59cb\u6570\u636e\u3002\u8fd9\u4f7f\u5f97 BGSAVE \u671f\u95f4\u5bf9\u5185\u5b58\u7684\u989d\u5916\u5f00\u9500\u53d6\u51b3\u4e8e\u5199\u64cd\u4f5c\u7684\u591a\u5c11\u3002<\/p>\n

          \u4f18\u7f3a\u70b9：<\/p>\n

            \n
          • \u2705 \u6587\u4ef6\u7d27\u51d1，\u6062\u590d\u901f\u5ea6\u5feb（\u76f4\u63a5\u52a0\u8f7d\u5230\u5185\u5b58）<\/li>\n
          • \u2705 \u5bf9 Redis \u6027\u80fd\u5f71\u54cd\u5c0f（\u5b50\u8fdb\u7a0b\u5904\u7406，\u4e3b\u8fdb\u7a0b\u4e0d\u963b\u585e）<\/li>\n
          • \u274c \u53ef\u80fd\u4e22\u5931\u6700\u540e\u4e00\u6b21\u5feb\u7167\u4e4b\u540e\u7684\u6570\u636e<\/li>\n
          • \u274c \u6570\u636e\u91cf\u5927\u65f6 fork \u53ef\u80fd\u963b\u585e（fork \u672c\u8eab\u662f\u963b\u585e\u64cd\u4f5c）<\/li>\n<\/ul>\n

            4.2 AOF（Append Only File）<\/h4>\n

            AOF \u4ee5\u65e5\u5fd7\u5f62\u5f0f\u8bb0\u5f55\u6bcf\u4e00\u6761\u5199\u547d\u4ee4，\u901a\u8fc7\u91cd\u653e\u65e5\u5fd7\u6062\u590d\u6570\u636e：<\/p>\n

            \u4e09\u79cd\u5237\u76d8\u7b56\u7565：<\/p>\n\n\u7b56\u7565\u914d\u7f6e\u6570\u636e\u5b89\u5168\u6027\u6027\u80fd<\/tr>\n\n\n\n\n
            \u6bcf\u6b21\u5199\u5165\u90fd fsync<\/td>\nalways<\/td>\n\u6700\u9ad8，\u51e0\u4e4e\u4e0d\u4e22\u6570\u636e<\/td>\n\u6700\u5dee<\/td>\n<\/tr>\n
            \u6bcf\u79d2 fsync \u4e00\u6b21<\/td>\neverysec（\u9ed8\u8ba4）<\/td>\n\u8f83\u9ad8，\u6700\u591a\u4e22 1 \u79d2\u6570\u636e<\/td>\n\u5e73\u8861<\/td>\n<\/tr>\n
            \u7531\u64cd\u4f5c\u7cfb\u7edf\u51b3\u5b9a<\/td>\nno<\/td>\n\u6700\u4f4e，\u4e22\u5931\u65f6\u957f\u7531 OS \u7b56\u7565\u51b3\u5b9a<\/td>\n\u6700\u597d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            AOF \u91cd\u5199（Rewrite）：<\/p>\n

            AOF \u6587\u4ef6\u4f1a\u4e0d\u65ad\u81a8\u80c0（\u8bb0\u5f55\u4e86\u5927\u91cf\u5386\u53f2\u5199\u547d\u4ee4），\u9700\u8981\u5b9a\u671f\u91cd\u5199\u538b\u7f29：<\/p>\n

            # \u89e6\u53d1\u6761\u4ef6（\u9ed8\u8ba4\u914d\u7f6e）
            \nauto-aof-rewrite-min-size 64mb # AOF \u6587\u4ef6\u81f3\u5c11 64MB \u624d\u89e6\u53d1\u91cd\u5199
            \nauto-aof-rewrite-percentage 100 # AOF \u6587\u4ef6\u6bd4\u4e0a\u6b21\u91cd\u5199\u540e\u589e\u957f\u4e86 100% \u65f6\u89e6\u53d1<\/p>\n

            # \u91cd\u5199\u6d41\u7a0b
            \n1. fork \u5b50\u8fdb\u7a0b
            \n2. \u5b50\u8fdb\u7a0b\u6839\u636e\u5f53\u524d\u5185\u5b58\u6570\u636e\u751f\u6210\u65b0 AOF \u6587\u4ef6（\u53ea\u5199\u6700\u7ec8\u72b6\u6001，\u5ffd\u7565\u4e2d\u95f4\u547d\u4ee4）
            \n3. \u671f\u95f4\u65b0\u7684\u5199\u547d\u4ee4\u540c\u65f6\u8ffd\u52a0\u5230\u65e7 AOF \u548c\u91cd\u5199\u7f13\u51b2\u533a
            \n4. \u5b50\u8fdb\u7a0b\u5b8c\u6210\u65b0\u6587\u4ef6\u540e，\u5c06\u7f13\u51b2\u533a\u4e2d\u7684\u589e\u91cf\u547d\u4ee4\u8ffd\u52a0\u5230\u65b0\u6587\u4ef6
            \n5. \u539f\u5b50\u66ff\u6362\u65e7 AOF \u6587\u4ef6<\/p>\n

            4.3 \u6df7\u5408\u6301\u4e45\u5316（Redis 4.0+）<\/h4>\n

            Redis 4.0 \u5f15\u5165\u4e86\u6df7\u5408\u6301\u4e45\u5316\u6a21\u5f0f，\u5c06 RDB \u548c AOF \u7ed3\u5408：<\/p>\n

            # \u5f00\u542f\u6df7\u5408\u6301\u4e45\u5316
            \naof-use-rdb-preamble yes<\/p>\n

            # \u6587\u4ef6\u683c\u5f0f
            \n\u250c\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\u2500\u2510
            \n\u2502 RDB \u683c\u5f0f\u7684\u5168\u91cf\u6570\u636e \u2502 AOF \u683c\u5f0f\u7684\u589e\u91cf\u547d\u4ee4 \u2502
            \n\u2502 （\u6700\u8fd1\u4e00\u6b21\u5feb\u7167） \u2502 （\u5feb\u7167\u540e\u7684\u65b0\u5199\u64cd\u4f5c） \u2502
            \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

            \u4f18\u70b9：<\/p>\n

              \n
            • \u52a0\u8f7d\u901f\u5ea6\u5feb（\u524d\u534a\u90e8\u5206\u662f RDB \u683c\u5f0f，\u76f4\u63a5\u52a0\u8f7d\u5230\u5185\u5b58）<\/li>\n
            • \u6570\u636e\u4e22\u5931\u5c11（\u540e\u534a\u90e8\u5206 AOF \u8bb0\u5f55\u4e86\u589e\u91cf\u547d\u4ee4）<\/li>\n
            • \u517c\u987e\u4e86\u6062\u590d\u901f\u5ea6\u548c\u6570\u636e\u5b8c\u6574\u6027<\/li>\n<\/ul>\n

              4.4 \u6301\u4e45\u5316\u9009\u578b\u5efa\u8bae<\/h4>\n\n\u573a\u666f\u63a8\u8350\u65b9\u6848\u7406\u7531<\/tr>\n\n\n\n\n\n
              \u7eaf\u7f13\u5b58，\u5141\u8bb8\u4e22\u6570\u636e<\/td>\n\u5173\u95ed\u6301\u4e45\u5316\u6216\u4ec5 RDB<\/td>\n\u6027\u80fd\u6700\u4f18，\u6062\u590d\u5feb<\/td>\n<\/tr>\n
              \u4e00\u822c\u7f13\u5b58<\/td>\nRDB + AOF（everysec）<\/td>\n\u6570\u636e\u5b89\u5168\u4e14\u6027\u80fd\u5e73\u8861<\/td>\n<\/tr>\n
              \u6570\u636e\u4e0d\u80fd\u4e22\u5931<\/td>\nAOF（always）<\/td>\n\u6700\u9ad8\u5b89\u5168\u6027，\u727a\u7272\u6027\u80fd<\/td>\n<\/tr>\n
              \u751f\u4ea7\u63a8\u8350<\/td>\n\u6df7\u5408\u6301\u4e45\u5316<\/td>\n\u52a0\u8f7d\u5feb + \u6570\u636e\u5b8c\u6574<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
              \n

              \u4e94\u3001Redis \u5185\u5b58\u7ba1\u7406<\/h3>\n

              5.1 \u5185\u5b58\u6a21\u578b<\/h4>\n

              Redis \u7684\u5185\u5b58\u5360\u7528\u7531\u4e94\u4e2a\u90e8\u5206\u7ec4\u6210：<\/p>\n

              \u250c\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 Redis \u8fdb\u7a0b\u603b\u5185\u5b58 \u2502
              \n\u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
              \n\u2502 \u2502 \u6570\u636e\u5185\u5b58 \u2502 \u2502 \u8fdb\u7a0b\u8fd0\u884c\u5185\u5b58 \u2502 \u2502
              \n\u2502 \u2502（\u952e\u503c\u5bf9\u6570\u636e）\u2502 \u2502（\u4ee3\u7801\/\u5e38\u91cf\/\u5806\u6808） \u2502 \u2502
              \n\u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
              \n\u2502 \u250c\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
              \n\u2502 \u2502 \u7f13\u51b2\u533a\u5185\u5b58 \u2502 \u2502
              \n\u2502 \u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502 \u2502
              \n\u2502 \u2502 \u2502 \u5ba2\u6237\u7aef \u2502 \u590d\u5236 \u2502 Pub\/Sub\u2502 \u2502 \u2502
              \n\u2502 \u2502 \u2502 \u8f93\u5165\u8f93\u51fa \u2502 \u79ef\u538b\u7f13\u51b2 \u2502 \u7f13\u51b2\u533a \u2502 \u2502 \u2502
              \n\u2502 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502 \u2502
              \n\u2502 \u2514\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
              \n\u2502 \u250c\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u2502
              \n\u2502 \u2502 Lua \u811a\u672c\u5185\u5b58（\u811a\u672c+\u4e34\u65f6\u6570\u636e） \u2502 \u2502
              \n\u2502 \u2514\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502
              \n\u2514\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\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

              5.2 \u5185\u5b58\u5206\u914d\u5668<\/h4>\n

              Redis \u4e0d\u76f4\u63a5\u5411\u64cd\u4f5c\u7cfb\u7edf\u7533\u8bf7\/\u91ca\u653e\u5185\u5b58，\u800c\u662f\u901a\u8fc7\u5185\u5b58\u5206\u914d\u5668\u7edf\u4e00\u7ba1\u7406：<\/p>\n\n\u5206\u914d\u5668\u7279\u70b9<\/tr>\n\n\n\n\n
              jemalloc（\u9ed8\u8ba4）<\/td>\n\u5185\u5b58\u788e\u7247\u7387\u6781\u4f4e，\u5c06\u5185\u5b58\u5212\u5206\u4e3a\u4e0d\u540c\u5927\u5c0f\u7684\u5757，\u6309\u7533\u8bf7\u5927\u5c0f\u5339\u914d\u6700\u5408\u9002\u7684\u5757<\/td>\n<\/tr>\n
              tcmalloc<\/td>\nGoogle \u5f00\u53d1，\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u6027\u80fd\u7565\u4f18<\/td>\n<\/tr>\n
              libc malloc<\/td>\n\u7cfb\u7edf\u9ed8\u8ba4，\u788e\u7247\u7387\u8f83\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              \u901a\u8fc7 INFO memory \u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u5185\u5b58\u6307\u6807，\u5173\u952e\u6307\u6807：<\/p>\n

                \n
              • used_memory：Redis \u5206\u914d\u5668\u5206\u914d\u7684\u5185\u5b58\u603b\u91cf<\/li>\n
              • used_memory_rss：\u64cd\u4f5c\u7cfb\u7edf\u5206\u914d\u7ed9 Redis \u7684\u7269\u7406\u5185\u5b58<\/li>\n
              • mem_fragmentation_ratio：rss \/ used_memory，\u788e\u7247\u7387\u6307\u6807，\u4e00\u822c 1.0-1.5 \u4e3a\u6b63\u5e38<\/li>\n<\/ul>\n

                5.3 \u8fc7\u671f\u5220\u9664\u7b56\u7565<\/h4>\n

                Redis \u91c7\u7528 \u60f0\u6027\u5220\u9664 + \u5b9a\u671f\u5220\u9664 \u7ec4\u5408\u7b56\u7565\u6e05\u7406\u8fc7\u671f key：<\/p>\n

                \u60f0\u6027\u5220\u9664：<\/p>\n

                  \n
                • \u6bcf\u6b21\u5ba2\u6237\u7aef\u8bbf\u95ee\u67d0\u4e2a key \u65f6，Redis \u5148\u68c0\u67e5\u8be5 key \u662f\u5426\u5df2\u8fc7\u671f<\/li>\n
                • \u5df2\u8fc7\u671f\u5219\u7acb\u5373\u5220\u9664\u5e76\u8fd4\u56de\u7a7a\u503c<\/li>\n
                • \u4f18\u70b9：CPU \u96f6\u989d\u5916\u5f00\u9500<\/li>\n
                • \u7f3a\u70b9：\u8fc7\u671f key \u82e5\u957f\u671f\u4e0d\u88ab\u8bbf\u95ee，\u4f1a\u6c38\u4e45\u5360\u7528\u5185\u5b58<\/li>\n<\/ul>\n

                  \u5b9a\u671f\u5220\u9664：<\/p>\n

                    \n
                  • \u5b9a\u65f6\u4efb\u52a1 serverCron（\u9ed8\u8ba4\u6bcf 100ms \u6267\u884c\u4e00\u6b21）\u8c03\u7528 activeExpireCycle \u51fd\u6570<\/li>\n
                  • \u904d\u5386\u8fc7\u671f\u952e\u54c8\u5e0c\u69fd\u62bd\u6837\u68c0\u67e5，\u5355\u4e2a\u69fd\u4f4d\u4e00\u8f6e\u6700\u591a 20 \u6b21\u91c7\u6837<\/li>\n
                  • \u62bd\u6837\u68c0\u6d4b\u5230\u8fc7\u671f key \u7acb\u5373\u5220\u9664；\u6837\u672c\u8fc7\u671f\u5360\u6bd4\u226525% \u5219\u6301\u7eed\u5faa\u73af\u62bd\u6837<\/li>\n
                  • \u5b58\u5728\u6267\u884c\u65f6\u957f\u4e0a\u9650，\u9ed8\u8ba4\u6700\u591a\u8fd0\u884c 25ms，\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b<\/li>\n
                  • \u4f18\u70b9：\u4e3b\u52a8\u6e05\u7406\u51b7\u6570\u636e，\u5e73\u8861 CPU \u4e0e\u5185\u5b58<\/li>\n<\/ul>\n

                    5.4 \u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/h4>\n

                    \u5f53\u5df2\u4f7f\u7528\u5185\u5b58\u8fbe\u5230 maxmemory \u9608\u503c\u65f6，Redis \u6839\u636e maxmemory-policy \u914d\u7f6e\u6267\u884c\u6dd8\u6c70：<\/p>\n\n\u7b56\u7565\u6dd8\u6c70\u8303\u56f4\u6dd8\u6c70\u89c4\u5219\u9002\u7528\u573a\u666f<\/tr>\n\n\n\n\n\n\n\n\n\n
                    noeviction<\/td>\n\u4e0d\u6dd8\u6c70<\/td>\n\u5199\u64cd\u4f5c\u8fd4\u56de OOM \u9519\u8bef<\/td>\n\u6838\u5fc3\u6570\u636e\u4e0d\u53ef\u4e22\u5931<\/td>\n<\/tr>\n
                    allkeys-lru<\/td>\n\u6240\u6709 key<\/td>\n\u6dd8\u6c70\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684 key<\/td>\n\u7eaf\u7f13\u5b58\u573a\u666f\u9996\u9009<\/td>\n<\/tr>\n
                    allkeys-lfu<\/td>\n\u6240\u6709 key<\/td>\n\u6dd8\u6c70\u8bbf\u95ee\u9891\u6b21\u6700\u4f4e\u7684 key（Redis 4.0+）<\/td>\n\u7eaf\u7f13\u5b58，\u6709\u660e\u786e\u70ed\u70b9<\/td>\n<\/tr>\n
                    allkeys-random<\/td>\n\u6240\u6709 key<\/td>\n\u968f\u673a\u6dd8\u6c70<\/td>\n\u6781\u5c11\u4f7f\u7528<\/td>\n<\/tr>\n
                    volatile-lru<\/td>\n\u4ec5\u8fc7\u671f key<\/td>\n\u6dd8\u6c70\u8fc7\u671f key \u4e2d\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684<\/td>\n\u6df7\u5408\u5b58\u50a8（\u6c38\u4e45+\u4e34\u65f6）<\/td>\n<\/tr>\n
                    volatile-lfu<\/td>\n\u4ec5\u8fc7\u671f key<\/td>\n\u6dd8\u6c70\u8fc7\u671f key \u4e2d\u8bbf\u95ee\u9891\u6b21\u6700\u4f4e\u7684<\/td>\n\u6df7\u5408\u5b58\u50a8<\/td>\n<\/tr>\n
                    volatile-random<\/td>\n\u4ec5\u8fc7\u671f key<\/td>\n\u968f\u673a\u6dd8\u6c70\u8fc7\u671f key<\/td>\n\u8fc7\u671f key \u65e0\u660e\u663e\u70ed\u70b9<\/td>\n<\/tr>\n
                    volatile-ttl<\/td>\n\u4ec5\u8fc7\u671f key<\/td>\n\u6dd8\u6c70\u5269\u4f59 TTL \u6700\u77ed\u7684 key<\/td>\n\u77ed\u671f\u4e34\u65f6\u7f13\u5b58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    LRU vs LFU：<\/p>\n

                      \n
                    • LRU（\u6700\u8fd1\u6700\u5c11\u4f7f\u7528）：\u57fa\u4e8e\u65f6\u95f4\u7ef4\u5ea6，\u6dd8\u6c70\u6700\u4e45\u672a\u8bbf\u95ee\u7684 key\u3002\u7f3a\u70b9：\u66fe\u7ecf\u7684\u70ed\u70b9 key \u957f\u671f\u4e0d\u8bbf\u95ee\u540e\u4ecd\u5360\u5185\u5b58（\u7f13\u5b58\u6c61\u67d3）<\/li>\n
                    • LFU（\u6700\u4e0d\u7ecf\u5e38\u4f7f\u7528）：\u57fa\u4e8e\u9891\u6b21\u7ef4\u5ea6，\u5229\u7528 redisObject \u7684 24 \u4f4d lru \u5b57\u6bb5（\u9ad8 16 \u4f4d\u8bb0\u5f55\u65f6\u95f4，\u4f4e 8 \u4f4d\u7528 Morris \u6982\u7387\u8ba1\u6570\u5668\u8bb0\u5f55\u9891\u6b21），\u914d\u5408\u65f6\u95f4\u8870\u51cf\u673a\u5236（lfu-decay-time）<\/li>\n<\/ul>\n

                      \u751f\u4ea7\u9009\u578b\u5efa\u8bae：<\/p>\n

                        \n
                      • \u7eaf\u7f13\u5b58 \u2192 allkeys-lfu \u6216 allkeys-lru<\/li>\n
                      • \u6df7\u5408\u5b58\u50a8 \u2192 volatile-lru \u6216 volatile-lfu<\/li>\n
                      • \u6838\u5fc3\u6570\u636e\u4e0d\u4e22 \u2192 noeviction（\u914d\u5408\u624b\u52a8\u6269\u5bb9）<\/li>\n<\/ul>\n
                        \n

                        \u516d\u3001Redis \u4e8b\u52a1\u4e0e\u9ad8\u7ea7\u7279\u6027<\/h3>\n

                        6.1 \u4e8b\u52a1\u673a\u5236<\/h4>\n

                        Redis \u4e8b\u52a1\u901a\u8fc7 MULTI\/EXEC \u5b9e\u73b0：<\/p>\n

                        MULTI # \u5f00\u542f\u4e8b\u52a1<\/span>
                        \nSET account:1:balance 100<\/span>
                        \nINCRBY account:1:balance -50<\/span>
                        \nSET account:2:balance 50<\/span>
                        \nINCRBY account:2:balance 50<\/span>
                        \nEXEC # \u6267\u884c\u4e8b\u52a1（\u6309\u987a\u5e8f\u539f\u5b50\u6267\u884c）<\/span><\/p>\n

                        \u7279\u6027：<\/p>\n

                          \n
                        • \u547d\u4ee4\u5165\u961f\u65f6\u4e0d\u505a\u6267\u884c，\u53ea\u8fd4\u56de QUEUED<\/li>\n
                        • EXEC \u65f6\u6309\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\u6240\u6709\u547d\u4ee4<\/li>\n
                        • \u4e0d\u652f\u6301\u56de\u6eda\u2014\u2014\u5982\u679c\u67d0\u6761\u547d\u4ee4\u6267\u884c\u51fa\u9519，\u540e\u7eed\u547d\u4ee4\u4ecd\u7136\u6267\u884c<\/li>\n
                        • \u901a\u8fc7 WATCH \u5b9e\u73b0\u4e50\u89c2\u9501：<\/li>\n<\/ul>\n

                          WATCH account:1:balance # \u76d1\u89c6 key<\/span>
                          \nMULTI
                          \n# … \u68c0\u67e5\u4f59\u989d\u5e76\u6263\u6b3e<\/span>
                          \nEXEC # \u5982\u679c WATCH \u7684 key \u88ab\u5176\u4ed6\u5ba2\u6237\u7aef\u4fee\u6539，EXEC \u8fd4\u56de nil<\/span><\/p>\n

                          6.2 Pipeline（\u7ba1\u9053）<\/h4>\n

                          Pipeline \u5c06\u591a\u4e2a\u547d\u4ee4\u6253\u5305\u4e00\u6b21\u6027\u53d1\u9001\u5230\u670d\u52a1\u7aef，\u51cf\u5c11\u7f51\u7edc RTT：<\/p>\n

                          # \u4e0d\u7528 Pipeline（4\u6b21\u7f51\u7edc\u5f80\u8fd4）<\/span>
                          \nSET key1 value1
                          \nSET key2 value2
                          \nSET key3 value3
                          \nGET key1<\/p>\n

                          # \u4f7f\u7528 Pipeline（1\u6b21\u7f51\u7edc\u5f80\u8fd4）<\/span>
                          \nPipeline:
                          \n SET key1 value1
                          \n SET key2 value2
                          \n SET key3 value3
                          \n GET key1<\/p>\n

                          \u6027\u80fd\u5dee\u5f02：\u5355\u6761\u547d\u4ee4 0.1ms RTT，1000 \u6761\u547d\u4ee4\u4e0d\u7528 Pipeline \u9700\u8981 100ms，\u4f7f\u7528 Pipeline \u7ea6 10ms\u3002<\/p>\n

                          6.3 Lua \u811a\u672c<\/h4>\n

                          Redis \u652f\u6301\u6267\u884c Lua \u811a\u672c，\u4fdd\u8bc1\u811a\u672c\u5185\u547d\u4ee4\u7684\u539f\u5b50\u6027：<\/p>\n

                          EVAL "
                          \nlocal current = redis.call('GET', KEYS[1])
                          \nif current == false then
                          \n redis.call('SET', KEYS[1], ARGV[1])
                          \n return 1
                          \nend
                          \nreturn 0
                          \n"<\/span> 1<\/span> mykey myvalue<\/p>\n

                          Lua \u811a\u672c\u7684\u539f\u5b50\u6027\u4fdd\u8bc1：\u6574\u4e2a\u811a\u672c\u4f5c\u4e3a\u4e00\u4e2a\u547d\u4ee4\u6267\u884c，\u6267\u884c\u671f\u95f4\u4e0d\u4f1a\u88ab\u5176\u4ed6\u547d\u4ee4\u63d2\u5165\u3002\u9002\u5408\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u3001\u9650\u6d41\u5668\u7b49\u9700\u8981\u539f\u5b50\u6027\u7684\u590d\u6742\u64cd\u4f5c\u3002<\/p>\n

                          6.4 Pub\/Sub \u53d1\u5e03\u8ba2\u9605<\/h4>\n

                          # \u8ba2\u9605\u9891\u9053<\/span>
                          \nSUBSCRIBE news:sports news:tech<\/p>\n

                          # \u53d1\u5e03\u6d88\u606f<\/span>
                          \nPUBLISH news:sports "\u56fd\u8db32:1\u80dc\u51fa"<\/span><\/p>\n

                          # \u6a21\u5f0f\u8ba2\u9605（\u652f\u6301\u901a\u914d\u7b26）<\/span>
                          \nPSUBSCRIBE news:*<\/p>\n

                          Stream（Redis 5.0+） \u662f\u5bf9 Pub\/Sub \u7684\u5347\u7ea7，\u652f\u6301\u6d88\u606f\u6301\u4e45\u5316\u3001\u6d88\u8d39\u8005\u7ec4\u548c ACK：<\/p>\n

                          # \u521b\u5efa\u6d88\u606f<\/span>
                          \nXADD mystream * sensor_id 1234<\/span> temperature 19.8<\/span><\/p>\n

                          # \u6d88\u8d39\u8005\u7ec4<\/span>
                          \nXGROUP CREATE mystream mygroup $ MKSTREAM
                          \nXREADGROUP GROUP mygroup consumer1 COUNT 10<\/span> BLOCK 5000<\/span> STREAMS mystream ><\/span>
                          \nXACK mystream mygroup 1526985685<\/span>-0<\/p>\n

                          \n

                          \u4e03\u3001Redis \u9ad8\u53ef\u7528\u67b6\u6784<\/h3>\n

                          7.1 \u4e3b\u4ece\u590d\u5236<\/h4>\n

                          \u6838\u5fc3\u539f\u7406：<\/p>\n

                          \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510 \u5168\u91cf\u540c\u6b65（\u9996\u6b21） \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
                          \n\u2502 Master \u2502 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> \u2502 Slave1 \u2502
                          \n\u2502 (\u4e3b\u8282\u70b9) \u2502 \u589e\u91cf\u540c\u6b65（\u540e\u7eed） \u2502 (\u4ece\u8282\u70b9) \u2502
                          \n\u2502 \u2502 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> \u2502 \u2502
                          \n\u2502 \u2502 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
                          \n\u2502 \u2502 \u5168\u91cf\/\u589e\u91cf\u540c\u6b65 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
                          \n\u2502 \u2502 \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500> \u2502 Slave2 \u2502
                          \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2502 (\u4ece\u8282\u70b9) \u2502
                          \n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

                          \u5168\u91cf\u540c\u6b65（\u9996\u6b21\u8fde\u63a5\u6216\u65ad\u8fde\u8fc7\u4e45）：<\/p>\n

                        • Slave \u53d1\u9001 PSYNC ? -1<\/li>\n
                        • Master \u6267\u884c BGSAVE \u751f\u6210 RDB \u5feb\u7167<\/li>\n
                        • Master \u5c06 RDB \u53d1\u9001\u7ed9 Slave<\/li>\n
                        • Slave \u52a0\u8f7d RDB \u5230\u5185\u5b58<\/li>\n
                        • Master \u5c06\u671f\u95f4\u7684\u589e\u91cf\u547d\u4ee4\u53d1\u9001\u7ed9 Slave \u6267\u884c<\/li>\n

                          \u589e\u91cf\u540c\u6b65（\u6b63\u5e38\u60c5\u51b5）：<\/p>\n

                        • Master \u7ef4\u62a4\u4e00\u4e2a replication backlog（\u590d\u5236\u79ef\u538b\u7f13\u51b2\u533a，\u9ed8\u8ba4 1MB）<\/li>\n
                        • Slave \u53d1\u9001 PSYNC <runid> <offset><\/li>\n
                        • Master \u6839\u636e offset \u4ece backlog \u4e2d\u53d1\u9001\u589e\u91cf\u6570\u636e<\/li>\n

                          7.2 \u54e8\u5175\u6a21\u5f0f（Sentinel）<\/h4>\n

                          \u54e8\u5175\u662f\u4e3b\u4ece\u590d\u5236\u7684\u5347\u7ea7\u65b9\u6848，\u63d0\u4f9b\u81ea\u52a8\u6545\u969c\u8f6c\u79fb：<\/p>\n

                          \u6838\u5fc3\u529f\u80fd：<\/p>\n

                            \n
                          • \u76d1\u63a7：\u6301\u7eed\u68c0\u6d4b Master \u548c Slave \u662f\u5426\u6b63\u5e38\u8fd0\u884c<\/li>\n
                          • \u901a\u77e5：\u5f53\u88ab\u76d1\u63a7\u7684\u5b9e\u4f8b\u51fa\u73b0\u95ee\u9898\u65f6，\u901a\u8fc7 Pub\/Sub \u901a\u77e5\u7ba1\u7406\u5458<\/li>\n
                          • \u81ea\u52a8\u6545\u969c\u8f6c\u79fb：Master \u4e0d\u53ef\u7528\u65f6，\u81ea\u52a8\u5c06\u67d0\u4e2a Slave \u63d0\u5347\u4e3a\u65b0\u7684 Master<\/li>\n
                          • \u914d\u7f6e\u4e2d\u5fc3：\u5ba2\u6237\u7aef\u8fde\u63a5 Sentinel \u83b7\u53d6\u5f53\u524d Master \u5730\u5740，\u6545\u969c\u8f6c\u79fb\u540e\u81ea\u52a8\u66f4\u65b0<\/li>\n<\/ul>\n

                            \u6545\u969c\u5224\u5b9a\u6d41\u7a0b：<\/p>\n

                          • Sentinel \u6bcf\u79d2\u5411\u6240\u6709\u5b9e\u4f8b\u53d1\u9001 PING<\/li>\n
                          • \u8d85\u8fc7 down-after-milliseconds \u672a\u54cd\u5e94 \u2192 \u6807\u8bb0\u4e3a\u4e3b\u89c2\u4e0b\u7ebf（SDOWN）<\/li>\n
                          • \u591a\u4e2a Sentinel \u90fd\u8ba4\u4e3a Master \u4e3b\u89c2\u4e0b\u7ebf \u2192 \u6807\u8bb0\u4e3a\u5ba2\u89c2\u4e0b\u7ebf（ODOWN）<\/li>\n
                          • Sentinel \u9009\u4e3e\u4e00\u4e2a Leader \u6267\u884c\u6545\u969c\u8f6c\u79fb<\/li>\n
                          • Leader \u9009\u62e9\u4e00\u4e2a Slave \u63d0\u5347\u4e3a\u65b0 Master（\u4f18\u5148\u7ea7：replica-priority \u6700\u9ad8\u3001\u590d\u5236\u504f\u79fb\u91cf\u6700\u5927\u3001runid \u6700\u5c0f）<\/li>\n
                          • \u5176\u4ed6 Slave \u6539\u4e3a\u590d\u5236\u65b0 Master<\/li>\n
                          • \u901a\u77e5\u5ba2\u6237\u7aef\u65b0 Master \u5730\u5740<\/li>\n

                            # Sentinel \u914d\u7f6e\u793a\u4f8b<\/span>
                            \nsentinel monitor mymaster 127.0<\/span>.0.1 6379<\/span> 2<\/span> # \u76d1\u63a7\u4e3b\u8282\u70b9，2\u4e2asentinel\u540c\u610f\u5373\u6545\u969c\u8f6c\u79fb<\/span>
                            \nsentinel down-after-milliseconds mymaster 5000<\/span> # 5\u79d2\u65e0\u54cd\u5e94\u89c6\u4e3a\u4e0b\u7ebf<\/span>
                            \nsentinel parallel-syncs mymaster 1<\/span> # \u6545\u969c\u8f6c\u79fb\u540e\u4e00\u6b21\u53ea\u540c\u6b65\u4e00\u4e2a\u4ece\u8282\u70b9<\/span>
                            \nsentinel failover-timeout mymaster 60000<\/span> # \u6545\u969c\u8f6c\u79fb\u8d85\u65f6\u65f6\u95f4<\/span><\/p>\n

                            7.3 Redis Cluster（\u96c6\u7fa4）<\/h4>\n

                            Redis Cluster \u662f Redis \u5b98\u65b9\u7684\u5206\u5e03\u5f0f\u65b9\u6848（Redis 3.0+），\u63d0\u4f9b\u6570\u636e\u5206\u7247\u3001\u9ad8\u53ef\u7528\u548c\u6c34\u5e73\u6269\u5c55：<\/p>\n

                            \u6838\u5fc3\u8bbe\u8ba1：<\/p>\n

                              \n
                            • \u6570\u636e\u5206\u7247：\u4f7f\u7528\u54c8\u5e0c\u69fd（Hash Slot）\u673a\u5236，\u5171 16384 \u4e2a\u69fd<\/li>\n
                            • \u69fd\u5206\u914d：CRC16(key) % 16384 \u51b3\u5b9a key \u5c5e\u4e8e\u54ea\u4e2a\u69fd<\/li>\n
                            • \u8282\u70b9\u5206\u914d：\u6bcf\u4e2a Master \u8d1f\u8d23\u4e00\u90e8\u5206\u69fd，Slave \u4f5c\u4e3a\u5bf9\u5e94 Master \u7684\u5907\u4efd<\/li>\n<\/ul>\n

                              \u67b6\u6784\u793a\u4f8b（3 \u4e3b 3 \u4ece）：<\/p>\n

                              Master A: slot 0-5460 \u2190\u2192 Slave A': \u5907\u4efd Master A
                              \nMaster B: slot 5461-10922 \u2190\u2192 Slave B': \u5907\u4efd Master B
                              \nMaster C: slot 10923-16383 \u2190\u2192 Slave C': \u5907\u4efd Master C<\/p>\n

                              \u5173\u952e\u7279\u6027：<\/p>\n\n\u7279\u6027\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n
                              \u53bb\u4e2d\u5fc3\u5316<\/td>\n\u6240\u6709\u8282\u70b9\u901a\u8fc7 Gossip \u534f\u8bae\u901a\u4fe1，\u65e0\u4e2d\u5fc3\u4ee3\u7406<\/td>\n<\/tr>\n
                              \u5ba2\u6237\u7aef\u91cd\u5b9a\u5411<\/td>\n\u8bbf\u95ee\u9519\u8bef\u7684\u8282\u70b9\u65f6\u8fd4\u56de MOVED \u91cd\u5b9a\u5411\u5230\u6b63\u786e\u7684\u8282\u70b9<\/td>\n<\/tr>\n
                              \u5728\u7ebf\u6269\u7f29\u5bb9<\/td>\n\u901a\u8fc7\u8fc1\u79fb\u69fd\u5b9e\u73b0\u8282\u70b9\u7684\u6dfb\u52a0\u548c\u79fb\u9664，\u670d\u52a1\u4e0d\u4e2d\u65ad<\/td>\n<\/tr>\n
                              \u6545\u969c\u8f6c\u79fb<\/td>\n\u96c6\u7fa4\u4e2d\u591a\u6570 Master \u8ba4\u4e3a\u67d0 Master \u4e0d\u53ef\u8fbe\u65f6，\u81ea\u52a8\u63d0\u5347\u5176 Slave<\/td>\n<\/tr>\n
                              \u5f02\u6b65\u590d\u5236<\/td>\n\u4e3b\u4ece\u4e4b\u95f4\u5f02\u6b65\u590d\u5236，\u6781\u7aef\u60c5\u51b5\u4e0b\u53ef\u80fd\u4e22\u6570\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              MOVED \u4e0e ASK：<\/p>\n

                                \n
                              • MOVED slot ip:port：\u69fd\u5df2\u6c38\u4e45\u8fc1\u79fb，\u5ba2\u6237\u7aef\u66f4\u65b0\u672c\u5730\u8def\u7531\u8868<\/li>\n
                              • ASK slot ip:port：\u69fd\u6b63\u5728\u8fc1\u79fb\u4e2d（\u4e34\u65f6\u72b6\u6001），\u5ba2\u6237\u7aef\u672c\u6b21\u91cd\u5b9a\u5411，\u4e0d\u66f4\u65b0\u8def\u7531\u8868<\/li>\n<\/ul>\n

                                Hash Tag：\u901a\u8fc7 {} \u5f3a\u5236\u76f8\u5173 key \u843d\u5728\u540c\u4e00\u69fd：<\/p>\n

                                # \u4ee5\u4e0b\u4e24\u4e2a key \u4f1a\u843d\u5728\u540c\u4e00\u4e2a\u69fd（\u56e0\u4e3a hash tag \u90fd\u662f user:1）<\/span>
                                \nSET {<\/span>user:1}<\/span>:name "\u5f20\u4e09"<\/span>
                                \nSET {<\/span>user:1}<\/span>:age 28<\/span><\/p>\n

                                \n

                                \u516b\u3001Redis \u751f\u4ea7\u5b9e\u8df5<\/h3>\n

                                8.1 \u7f13\u5b58\u4e09\u5927\u95ee\u9898<\/h4>\n\n\u95ee\u9898\u63cf\u8ff0\u89e3\u51b3\u65b9\u6848<\/tr>\n\n\n\n\n
                                \u7f13\u5b58\u7a7f\u900f<\/td>\n\u67e5\u8be2\u4e0d\u5b58\u5728\u7684\u6570\u636e，\u6bcf\u6b21\u90fd\u7a7f\u900f\u5230 DB<\/td>\n\u5e03\u9686\u8fc7\u6ee4\u5668；\u7a7a\u503c\u7f13\u5b58（\u8bbe\u77ed TTL）<\/td>\n<\/tr>\n
                                \u7f13\u5b58\u51fb\u7a7f<\/td>\n\u70ed\u70b9 key \u8fc7\u671f\u77ac\u95f4，\u5927\u91cf\u8bf7\u6c42\u6253\u5230 DB<\/td>\n\u4e92\u65a5\u9501（SETNX）；\u70ed\u70b9 key \u6c38\u4e0d\u8fc7\u671f；\u903b\u8f91\u8fc7\u671f<\/td>\n<\/tr>\n
                                \u7f13\u5b58\u96ea\u5d29<\/td>\n\u5927\u91cf key \u540c\u65f6\u8fc7\u671f\u6216 Redis \u5b95\u673a<\/td>\nTTL \u52a0\u968f\u673a\u503c；\u591a\u7ea7\u7f13\u5b58；\u96c6\u7fa4\u9ad8\u53ef\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                8.2 \u5206\u5e03\u5f0f\u9501\u5b9e\u73b0<\/h4>\n

                                # \u52a0\u9501（\u539f\u5b50\u64cd\u4f5c）<\/span>
                                \nSET lock:order:123 uuid NX PX 30000<\/span><\/p>\n

                                # \u89e3\u9501（Lua \u811a\u672c\u4fdd\u8bc1\u539f\u5b50\u6027）<\/span>
                                \nEVAL "
                                \nif redis.call('GET', KEYS[1]) == ARGV[1] then
                                \n return redis.call('DEL', KEYS[1])
                                \nelse
                                \n return 0
                                \nend
                                \n"<\/span> 1<\/span> lock:order:123 uuid<\/p>\n

                                \u751f\u4ea7\u5efa\u8bae：\u5355\u673a\u9501\u7528 Redis \u5373\u53ef；\u591a\u8282\u70b9\u5f3a\u4e00\u81f4\u6027\u573a\u666f\u63a8\u8350\u4f7f\u7528 RedLock \u6216 ZooKeeper\u3002<\/p>\n

                                8.3 Redis \u4e0e\u5176\u4ed6\u7ec4\u4ef6\u7684\u5bf9\u6bd4<\/h4>\n\n\u7ef4\u5ea6RedisMemcachedMongoDB<\/tr>\n\n\n\n\n\n\n\n\n
                                \u6570\u636e\u7ed3\u6784<\/td>\n\u4e30\u5bcc（String\/Hash\/List\/Set\/ZSet\/Stream）<\/td>\n\u7b80\u5355 KV<\/td>\n\u6587\u6863\u578b（BSON）<\/td>\n<\/tr>\n
                                \u6301\u4e45\u5316<\/td>\nRDB + AOF<\/td>\n\u4e0d\u652f\u6301<\/td>\n\u539f\u751f\u652f\u6301<\/td>\n<\/tr>\n
                                \u7ebf\u7a0b\u6a21\u578b<\/td>\n\u5355\u7ebf\u7a0b\u6267\u884c（6.0+ \u591a\u7ebf\u7a0bIO）<\/td>\n\u591a\u7ebf\u7a0b<\/td>\n\u591a\u7ebf\u7a0b<\/td>\n<\/tr>\n
                                \u96c6\u7fa4<\/td>\nCluster（\u539f\u751f\u5206\u7247）<\/td>\n\u5ba2\u6237\u7aef\u5206\u7247<\/td>\n\u539f\u751f\u5206\u7247<\/td>\n<\/tr>\n
                                \u5185\u5b58\u7ba1\u7406<\/td>\n\u7cbe\u7ec6（jemalloc + \u591a\u79cd\u6dd8\u6c70\u7b56\u7565）<\/td>\n\u7b80\u5355 slab \u5206\u914d<\/td>\nWiredTiger \u5f15\u64ce<\/td>\n<\/tr>\n
                                \u4e8b\u52a1<\/td>\nMULTI\/EXEC（\u4e0d\u652f\u6301\u56de\u6eda）<\/td>\n\u4e0d\u652f\u6301<\/td>\n\u591a\u6587\u6863\u4e8b\u52a1（4.0+）<\/td>\n<\/tr>\n
                                \u9002\u7528\u573a\u666f<\/td>\n\u7f13\u5b58\/\u961f\u5217\/\u6392\u884c\u699c\/\u5206\u5e03\u5f0f\u9501<\/td>\n\u7b80\u5355\u7f13\u5b58<\/td>\n\u6587\u6863\u5b58\u50a8\/\u5185\u5bb9\u7ba1\u7406<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                                8.4 \u5173\u952e\u914d\u7f6e\u8c03\u4f18<\/h4>\n

                                # \u5185\u5b58\u914d\u7f6e<\/span>
                                \nmaxmemory 8gb # \u6700\u5927\u5185\u5b58（\u5efa\u8bae\u9884\u7559 30% \u7ed9\u7cfb\u7edf）<\/span>
                                \nmaxmemory-policy allkeys-lfu # \u6dd8\u6c70\u7b56\u7565<\/span><\/p>\n

                                # \u6301\u4e45\u5316\u914d\u7f6e<\/span>
                                \nsave 900<\/span> 1<\/span> # RDB \u89e6\u53d1\u6761\u4ef6<\/span>
                                \nsave 300<\/span> 10<\/span>
                                \nsave 60<\/span> 10000<\/span>
                                \naof-use-rdb-preamble yes<\/span> # \u6df7\u5408\u6301\u4e45\u5316<\/span>
                                \nauto-aof-rewrite-percentage 100<\/span> # AOF \u91cd\u5199\u89e6\u53d1<\/span><\/p>\n

                                # \u7f51\u7edc\u914d\u7f6e<\/span>
                                \ntcp-backlog 511<\/span> # TCP \u5168\u8fde\u63a5\u961f\u5217<\/span>
                                \ntimeout<\/span> 300<\/span> # \u7a7a\u95f2\u8fde\u63a5\u8d85\u65f6（0\u4e3a\u4e0d\u8d85\u65f6）<\/span>
                                \ntcp-keepalive 300<\/span> # TCP \u4fdd\u6d3b\u65f6\u95f4<\/span><\/p>\n

                                # \u5b89\u5168\u914d\u7f6e<\/span>
                                \nrequirepass your-strong-password # \u8bbe\u7f6e\u5bc6\u7801<\/span>
                                \nrename-command FLUSHALL ""<\/span> # \u7981\u7528\u5371\u9669\u547d\u4ee4<\/span>
                                \nrename-command CONFIG ""<\/span><\/p>\n

                                # \u6027\u80fd\u914d\u7f6e<\/span>
                                \nhz 10<\/span> # serverCron \u6267\u884c\u9891\u7387（\u9ed8\u8ba410，\u9ad8\u8d1f\u8f7d\u53ef\u8c03\u81f3100）<\/span>
                                \nslowlog-log-slower-than 10000<\/span> # \u6162\u67e5\u8be2\u9608\u503c（\u5fae\u79d2）<\/span>
                                \nslowlog-max-len 128<\/span> # \u6162\u67e5\u8be2\u65e5\u5fd7\u6700\u5927\u6761\u6570<\/span><\/p>\n

                                \n

                                \u4e5d\u3001 \u5b89\u88c5\u914d\u7f6e<\/h3>\n

                                9.1 \u4e0b\u8f7d\u5b89\u88c5<\/h4>\n

                                \u624b\u52a8\u521b\u5efa SCLo-scl \u4ed3\u5e93\u6587\u4ef6<\/p>\n

                                sudo<\/span> vi<\/span> \/etc\/yum.repos.d\/CentOS-SCLo-scl.repo<\/p>\n

                                \u8f93\u5165\u4ee5\u4e0b\u5185\u5bb9<\/p>\n

                                [<\/span>centos-sclo-sclo]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo sclo
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/$basearch<\/span>\/sclo\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>1<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                [<\/span>centos-sclo-sclo-source]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo sclo Sources
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/Source\/sclo\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>0<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                [<\/span>centos-sclo-sclo-debuginfo]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo sclo Debug
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/$basearch<\/span>\/debug\/sclo\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>0<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                \u624b\u52a8\u521b\u5efa SCLo-rh \u4ed3\u5e93\u6587\u4ef6（devtoolset \u4f9d\u8d56\u6b64\u5e93）<\/p>\n

                                sudo<\/span> vi<\/span> \/etc\/yum.repos.d\/CentOS-SCLo-scl-rh.repo<\/p>\n

                                \u8f93\u5165\u4ee5\u4e0b\u5185\u5bb9<\/p>\n

                                [<\/span>centos-sclo-rh]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo rh
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/$basearch<\/span>\/rh\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>1<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                [<\/span>centos-sclo-rh-source]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo rh Sources
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/Source\/rh\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>0<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                [<\/span>centos-sclo-rh-debuginfo]<\/span>
                                \nname<\/span>=<\/span>CentOS-7 – SCLo rh Debug
                                \nbaseurl<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/7\/sclo\/$basearch<\/span>\/debug\/rh\/
                                \ngpgcheck<\/span>=<\/span>1<\/span>
                                \nenabled<\/span>=<\/span>0<\/span>
                                \ngpgkey<\/span>=<\/span>https:\/\/mirrors.aliyun.com\/centos\/RPM-GPG-KEY-CentOS-7<\/p>\n

                                \u91cd\u5efa yum \u7f13\u5b58<\/p>\n

                                sudo<\/span> yum clean all
                                \nsudo<\/span> yum makecache<\/p>\n

                                \u5b89\u88c5C\u8bed\u8a00\u7f16\u8bd1\u73af\u5883<\/p>\n

                                sudo<\/span> yum install<\/span> centos-release-scl scl-utils-build
                                \nsudo<\/span> yum install<\/span> -y<\/span> –nogpgcheck<\/span> devtoolset-8-toolchain
                                \n# \u6ce8\u610f: \u6267\u884c\u6b64\u547d\u4ee4\u4f1a\u81ea\u52a8\u5207\u6362\u5230 root \u7528\u6237<\/span>
                                \nsudo<\/span> scl enable<\/span> devtoolset-8 bash<\/span><\/p>\n

                                \u6d4b\u8bd5 gcc \u7248\u672c<\/p>\n

                                gcc –version<\/span><\/p>\n

                                \u4e0b\u8f7d\u5730\u5740：https:\/\/download.redis.io\/releases\/ \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                \u4e0b\u8f7d\u540e\u4e0a\u4f20\u5230 hadoop1 \u7684 \/opt\/software \u76ee\u5f55\u4e0b，\u5e76\u7528 tar \u547d\u4ee4\u89e3\u538b \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                \u8fdb\u5165\u89e3\u538b\u540e\u7684 redis \u76ee\u5f55\u4f7f\u7528 make \u8fdb\u884c\u7f16\u8bd1 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                \u7f16\u8bd1\u5b8c\u6210\u540e\u7ee7\u7eed\u6267\u884c make install \u8fdb\u884c\u5b89\u88c5 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                \u5b89\u88c5\u76ee\u5f55：\/usr\/local\/bin<\/p>\n

                                9.2 \u540e\u53f0\u542f\u52a8\u914d\u7f6e<\/h4>\n

                                \u4e00\u4efdredis.conf\u5230 hadoop \u5bb6\u76ee\u5f55\u4e0b<\/p>\n

                                cp<\/span> \/opt\/module\/redis-6.0.8\/redis.conf ~\/my_redis.conf<\/p>\n

                                \u4fee\u6539 vim ~\/my_redis.conf \u6587\u4ef6<\/p>\n

                                daemonize yes<\/span>
                                \n# bind 127.0.0.1 \u6ce8\u91ca\u6389\u8fd9\u4e2a\u914d\u7f6e<\/span>
                                \nprotected-mode no<\/p>\n

                                9.3 \u542f\u52a8\u548c\u5173\u95ed<\/h4>\n

                                redis-server ~\/my_redis.conf # \u542f\u52a8<\/span>
                                \nredis-cli # \u5ba2\u6237\u7aef\u8bbf\u95ee<\/span>
                                \nredis-cli shutdown<\/span> # \u5173\u95ed<\/span><\/p>\n

                                \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

                                \n

                                \u5341\u3001\u5173\u952e\u8981\u70b9\u603b\u7ed3<\/h3>\n
                              • \u7eaf\u5185\u5b58 + \u5355\u7ebf\u7a0b\u6267\u884c \u662f Redis \u9ad8\u6027\u80fd\u7684\u57fa\u77f3，\u914d\u5408 IO \u591a\u8def\u590d\u7528\u5b9e\u73b0\u5355\u7ebf\u7a0b\u4e07\u7ea7\u5e76\u53d1<\/li>\n
                              • \u4e24\u5c42\u67b6\u6784\u8bbe\u8ba1 \u662f Redis \u6700\u7cbe\u5999\u7684\u8bbe\u8ba1\u4e4b\u4e00\u2014\u2014\u5bf9\u5916\u66b4\u9732 5 \u79cd\u903b\u8f91\u7c7b\u578b，\u5e95\u5c42\u81ea\u52a8\u9009\u62e9\u6700\u4f18\u7269\u7406\u7f16\u7801（redisObject \u6865\u63a5 type \u548c encoding）<\/li>\n
                              • \u8df3\u8868 \u662f ZSet \u7684\u6392\u5e8f\u5f15\u64ce，\u76f8\u6bd4\u7ea2\u9ed1\u6811\u5b9e\u73b0\u66f4\u7b80\u5355\u3001\u8303\u56f4\u67e5\u8be2\u66f4\u9ad8\u6548\u3001\u5185\u5b58\u66f4\u53cb\u597d<\/li>\n
                              • \u6301\u4e45\u5316\u9009\u578b \u76f4\u63a5\u5f71\u54cd\u6570\u636e\u5b89\u5168\u6027\u548c\u6027\u80fd\u2014\u2014\u751f\u4ea7\u63a8\u8350\u6df7\u5408\u6301\u4e45\u5316（RDB + AOF \u589e\u91cf），\u517c\u987e\u6062\u590d\u901f\u5ea6\u548c\u6570\u636e\u5b8c\u6574\u6027<\/li>\n
                              • \u8fc7\u671f\u6e05\u7406 \u91c7\u7528\u60f0\u6027\u5220\u9664 + \u5b9a\u671f\u5220\u9664\u7ec4\u5408\u7b56\u7565，\u662f CPU \u548c\u5185\u5b58\u4e4b\u95f4\u7684\u6298\u4e2d\u8bbe\u8ba1<\/li>\n
                              • \u5185\u5b58\u6dd8\u6c70 \u63d0\u4f9b 8 \u79cd\u7b56\u7565，\u7eaf\u7f13\u5b58\u573a\u666f\u63a8\u8350 allkeys-lfu \u6216 allkeys-lru<\/li>\n
                              • \u9ad8\u53ef\u7528\u6f14\u8fdb\u8def\u5f84：\u4e3b\u4ece\u590d\u5236（\u8bfb\u5199\u5206\u79bb）\u2192 \u54e8\u5175\u6a21\u5f0f（\u81ea\u52a8\u6545\u969c\u8f6c\u79fb）\u2192 Cluster \u96c6\u7fa4（\u6c34\u5e73\u6269\u5c55 + \u53bb\u4e2d\u5fc3\u5316\u5206\u7247）<\/li>\n
                              • \u751f\u4ea7\u5b9e\u8df5 \u9700\u91cd\u70b9\u5173\u6ce8\u7f13\u5b58\u7a7f\u900f\/\u51fb\u7a7f\/\u96ea\u5d29\u7684\u9884\u9632\u3001\u5206\u5e03\u5f0f\u9501\u7684\u6b63\u786e\u5b9e\u73b0\u3001\u5371\u9669\u547d\u4ee4\u7684\u7981\u7528\u3001\u4ee5\u53ca\u6162\u67e5\u8be2\u7684\u6301\u7eed\u76d1\u63a7<\/li>\n","protected":false},"excerpt":{"rendered":"

                                Redis \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u3001\u57fa\u4e8e\u5185\u5b58\u7684\u9ad8\u6027\u80fd\u952e\u503c\u5b58\u50a8\u6570\u636e\u5e93，\u652f\u6301\u4e30\u5bcc\u7684\u6570\u636e\u7ed3\u6784\u7c7b\u578b，\u5355\u8282\u70b9 QPS \u53ef\u8fbe 10 \u4e07，\u8bfb\u5199\u5ef6\u8fdf\u4f4e\u81f3\u4e9a\u6beb\u79d2\u7ea7\u522b\u3002\u672c\u6587\u4ece Redis \u7684\u6838\u5fc3\u67b6\u6784\u3001\u6570\u636e\u7ed3\u6784\u3001\u6301\u4e45\u5316\u673a\u5236\u3001\u5185\u5b58\u7ba1\u7406\u3001\u9ad8\u53ef\u7528\u65b9\u6848\u7b49\u7ef4\u5ea6\u8fdb\u884c\u7cfb\u7edf\u6027\u7684\u6df1\u5ea6\u5256\u6790\u3002 \u4e00\u3001Redis \u6982\u8ff0
                                \n1.1 \u4ec0\u4e48\u662f Redis
                                \nRedis（Remote Dictionary Server）\u662f\u4e00\u4e2a\u57fa\u4e8e\u5185\u5b58\u7684\u952e\u503c\u5b58\u50a8\u7cfb\u7edf，\u7531 Sa<\/p>\n","protected":false},"author":2,"featured_media":88042,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[105,323,2330,100,188],"topic":[],"class_list":["post-88047","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-redis","tag-323","tag-2330","tag-100","tag-188"],"yoast_head":"\n\u5341\u4e03\u3001Redis \u6838\u5fc3\u539f\u7406\u4e0e\u67b6\u6784\u8be6\u89e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/88047.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5341\u4e03\u3001Redis \u6838\u5fc3\u539f\u7406\u4e0e\u67b6\u6784\u8be6\u89e3 - 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