{"id":201556,"date":"2025-05-10T10:13:49","date_gmt":"2025-05-10T02:13:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201556\/"},"modified":"2025-05-10T10:13:49","modified_gmt":"2025-05-10T02:13:49","slug":"redis%e5%9f%ba%e6%9c%ac%e7%b1%bb%e5%9e%8b%e5%8f%8a%e5%85%b6%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201556\/","title":{"rendered":"Redis\u57fa\u672c\u7c7b\u578b\u53ca\u5176\u6570\u636e\u7ed3\u6784"},"content":{"rendered":"

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

Redis\u57fa\u672c\u7c7b\u578b\u53ca\u5176\u6570\u636e\u7ed3\u6784<\/h1>\n

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

IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aRedis\u57fa\u672c\u7c7b\u578b\u53ca\u5176\u6570\u636e\u7ed3\u6784\u300b\uff0c\u804a\u804a\u6570\u636e\u7ed3\u6784\u3001\u5bf9\u8c61\u3001Redis\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n

\u4ee5\u524d\u5728\u4f7f\u7528Redis\u7684\u65f6\u5019\uff0c\u53ea\u662f\u7b80\u5355\u5730\u4f7f\u7528\u5b83\u63d0\u4f9b\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u548c\u63a5\u53e3\uff0c\u5e76\u6ca1\u6709\u6df1\u5165\u7814\u7a76\u5b83\u5e95\u5c42\u7684\u6570\u636e\u7ed3\u6784\u3002\u6700\u8fd1\u6253\u7b97\u91cd\u65b0\u5b66\u4e60\u68b3\u7406\u4e00\u4e0bRedis\u65b9\u9762\u7684\u77e5\u8bc6\uff0c\u6240\u4ee5\u6253\u7b97\u4ece\u4ecb\u7ecdRedis\u7684\u57fa\u672c\u7c7b\u578b\u53ca\u5176\u6570\u636e\u7ed3\u6784\u5165\u624b\u3002<\/p>\n<\/p>\n

redisObject<\/strong><\/h3>\n

Redis\u7684key\u662f\u9876\u5c42\u6a21\u578b\uff0c\u5b83\u7684value\u662f\u6241\u5e73\u5316\u7684\u3002Redis\u4e2d\uff0c\u6240\u6709\u7684value\u90fd\u662f\u4e00\u4e2aobject\uff0c\u5b83\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<\/p>\n

typedef struct redisObject { \r\n unsigned [type] 4; \r\n unsigned [encoding] 4; \r\n unsigned [lru] REDIS_LRU_BITS; \r\n int refcount; \r\n void *ptr; \r\n} robj; \r\n<\/pre>\n
\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u8fd9\u51e0\u4e2a\u5b57\u6bb5\uff1a<\/p>\n
    \n
  • type\uff1a\u6570\u636e\u7c7b\u578b\uff0c\u5c31\u662f\u6211\u4eec\u719f\u6089\u7684string\u3001hash\u3001list\u7b49\u3002<\/li>\n
  • encoding\uff1a\u5185\u90e8\u7f16\u7801\uff0c\u5176\u5b9e\u5c31\u662f\u672c\u6587\u8981\u4ecb\u7ecd\u7684\u6570\u636e\u7ed3\u6784\u3002\u6307\u7684\u662f\u5f53\u524d\u8fd9\u4e2avalue\u5e95\u5c42\u662f\u7528\u7684\u4ec0\u4e48\u6570\u636e\u7ed3\u6784\u3002\u56e0\u4e3a\u540c\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u5e95\u5c42\u4e5f\u6709\u591a\u79cd\u6570\u636e\u7ed3\u6784\u7684\u5b9e\u73b0\uff0c\u6240\u4ee5\u8fd9\u91cc\u9700\u8981\u6307\u5b9a\u6570\u636e\u7ed3\u6784\u3002<\/li>\n
  • REDIS_LRU_BITS\uff1a\u5f53\u524d\u5bf9\u8c61\u53ef\u4ee5\u4fdd\u7559\u7684\u65f6\u957f\u3002\u8fd9\u4e2a\u6211\u4eec\u5728\u540e\u9762\u8bb2\u952e\u7684\u8fc7\u671f\u7b56\u7565\u7684\u65f6\u5019\u8bb2\u3002<\/li>\n
  • refcount\uff1a\u5bf9\u8c61\u5f15\u7528\u8ba1\u6570\uff0c\u7528\u4e8eGC\u3002<\/li>\n
  • ptr\uff1a\u6307\u9488\uff0c\u6307\u5411\u4ee5encoding\u7684\u65b9\u5f0f\u5b9e\u73b0\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5b9e\u9645\u5730\u5740\u3002<\/li>\n<\/ul>\n

    \n <\/p>\n
    string<\/strong><\/h3>\n
    \u5728Redis\u5185\u90e8\uff0cstring\u7c7b\u578b\u6709\u4e24\u79cd\u5e95\u5c42\u50a8\u5b58\u7ed3\u6784\u3002Redis\u4f1a\u6839\u636e\u5b58\u50a8\u7684\u6570\u636e\u53ca\u7528\u6237\u7684\u64cd\u4f5c\u6307\u4ee4\u81ea\u52a8\u9009\u62e9\u5408\u9002\u7684\u7ed3\u6784\uff1a<\/p>\n
      \n
    • int\uff1a\u5b58\u653e\u6574\u6570\u7c7b\u578b;<\/li>\n
    • SDS\uff1a\u5b58\u653e\u6d6e\u70b9\u3001\u5b57\u7b26\u4e32\u3001\u5b57\u8282\u7c7b\u578b;<\/li>\n<\/ul>\n
      SDS: \u7b80\u5355\u52a8\u6001\u5b57\u7b26\u4e32 simple dynamic string \r\n<\/pre>\n
      SDS<\/strong><\/p>\n
      SDS\u7684\u5185\u90e8\u6570\u636e\u7ed3\u6784\uff1a<\/p>\n<\/p>\n
      typedef struct sdshdr { \r\n \/\/ buf\u4e2d\u5df2\u7ecf\u5360\u7528\u7684\u5b57\u7b26\u957f\u5ea6 \r\n unsigned int len; \r\n \/\/ buf\u4e2d\u5269\u4f59\u53ef\u7528\u7684\u5b57\u7b26\u957f\u5ea6 \r\n unsigned int free; \r\n char buf[]; \r\n<\/pre>\n
      \u53ef\u89c1\uff0c\u5176\u5e95\u5c42\u662f\u4e00\u4e2achar\u6570\u7ec4\u3002buf\u6700\u5927\u5bb9\u91cf\u4e3a512M\uff0c\u91cc\u9762\u53ef\u4ee5\u653e\u5b57\u7b26\u4e32\u3001\u6d6e\u70b9\u6570\u548c\u5b57\u8282\u3002\u6240\u4ee5\u4f60\u751a\u81f3\u53ef\u4ee5\u653e\u4e00\u5f20\u5e8f\u5217\u5316\u540e\u7684\u56fe\u7247\u3002\u5b83\u4e3a\u4ec0\u4e48\u6ca1\u6709\u76f4\u63a5\u4f7f\u7528\u6570\u7ec4\uff0c\u800c\u662f\u5305\u88c5\u6210\u4e86\u8fd9\u6837\u7684\u6570\u636e\u7ed3\u6784\u5462?<\/p>\n
      \u56e0\u4e3abuf\u4f1a\u6709\u52a8\u6001\u6269\u5bb9\u548c\u7f29\u5bb9\u7684\u9700\u6c42\u3002\u5982\u679c\u76f4\u63a5\u4f7f\u7528\u6570\u7ec4\uff0c\u90a3\u6bcf\u6b21\u5bf9\u5b57\u7b26\u4e32\u7684\u4fee\u6539\u90fd\u4f1a\u5bfc\u81f4\u91cd\u65b0\u5206\u914d\u5185\u5b58\uff0c\u6548\u7387\u5f88\u4f4e\u3002<\/p>\n
      buf\u7684\u6269\u5bb9\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n
        \n
      • \u5982\u679c\u4fee\u6539\u540elen\u957f\u5ea6\u5c06\u5c0f\u4e8e1M,\u8fd9\u65f6\u5206\u914d\u7ed9free\u7684\u5927\u5c0f\u548clen\u4e00\u6837,\u4f8b\u5982\u4fee\u6539\u8fc7\u540e\u4e3a10\u5b57\u8282, \u90a3\u4e48\u7ed9free\u4e5f\u662f10\u5b57\u8282\uff0cbuf\u5b9e\u9645\u957f\u5ea6\u53d8\u6210\u4e8610 + 10 + 1 = 21byte<\/li>\n
      • \u5982\u679c\u4fee\u6539\u540elen\u957f\u5ea6\u5c06\u5927\u4e8e\u7b49\u4e8e1M,\u8fd9\u65f6\u5206\u914d\u7ed9free\u7684\u957f\u5ea6\u4e3a1M,\u4f8b\u5982\u4fee\u6539\u8fc7\u540e\u4e3a30M,\u90a3\u4e48\u7ed9free\u662f1M.buf\u5b9e\u9645\u957f\u5ea6\u53d8\u6210\u4e8630M + 1M + 1byte <\/li>\n<\/ul>\n

        \n <\/p>\n
        \u60f0\u6027\u7a7a\u95f4\u91ca\u653e\u6307\u7684\u662f\u5f53\u5b57\u7b26\u4e32\u7f29\u77ed\u65f6\uff0c\u5e76\u6ca1\u6709\u771f\u6b63\u7684\u7f29\u5bb9\uff0c\u800c\u662f\u79fb\u52a8free\u7684\u6307\u9488\u3002\u8fd9\u6837\u5c06\u6765\u5b57\u7b26\u4e32\u957f\u5ea6\u589e\u52a0\u65f6\uff0c\u5c31\u4e0d\u7528\u91cd\u65b0\u5206\u914d\u5185\u5b58\u4e86\u3002\u4f46\u8fd9\u6837\u4f1a\u9020\u6210\u5185\u5b58\u6d6a\u8d39\uff0cRedis\u63d0\u4f9b\u4e86API\u6765\u771f\u6b63\u91ca\u653e\u5185\u5b58\u3002<\/p>\n
        list<\/strong><\/h3>\n
        list\u5e95\u5c42\u6709\u4e24\u79cd\u6570\u636e\u7ed3\u6784\uff1a\u94fe\u8868linkedlist\u548c\u538b\u7f29\u5217\u8868ziplist\u3002\u5f53list\u5143\u7d20\u4e2a\u6570\u5c11\u4e14\u5143\u7d20\u5185\u5bb9\u957f\u5ea6\u4e0d\u5927\u65f6\uff0c\u4f7f\u7528ziplist\u5b9e\u73b0\uff0c\u5426\u5219\u4f7f\u7528linkedlist\u3002<\/p>\n
        \u94fe\u8868<\/strong><\/p>\n
        Redis\u4f7f\u7528\u7684\u94fe\u8868\u662f\u53cc\u5411\u94fe\u8868\u3002\u4e3a\u4e86\u65b9\u4fbf\u64cd\u4f5c\uff0c\u4f7f\u7528\u4e86\u4e00\u4e2alist\u7ed3\u6784\u6765\u6301\u6709\u8fd9\u4e2a\u94fe\u8868\u3002\u5982\u56fe\u6240\u793a\uff1a<\/p>\n

        \n <\/p>\n
        typedef struct list{ \r\n listNode *head; \r\n listNode *tail; \r\n unsigned long len; \r\n void *(*dup)(void *ptr); \r\n void *(*free)(void *ptr); \r\n int (*match)(void *ptr,void *key); \r\n}list; \r\n<\/pre>\n
        data\u5b58\u7684\u5176\u5b9e\u4e5f\u662f\u4e00\u4e2a\u6307\u9488\u3002\u94fe\u8868\u91cc\u9762\u7684\u5143\u7d20\u662f\u4e0a\u9762\u4ecb\u7ecd\u7684string\u3002\u56e0\u4e3a\u662f\u53cc\u5411\u94fe\u8868\uff0c\u6240\u4ee5\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u628a\u5b83\u5f53\u6210\u4e00\u4e2a\u6808\u6216\u8005\u961f\u5217\u6765\u4f7f\u7528\u3002<\/p>\n
        \u538b\u7f29\u5217\u8868<\/strong><\/p>\n
        \u4e0e\u4e0a\u9762\u7684\u94fe\u8868\u76f8\u5bf9\u5e94\uff0c\u538b\u7f29\u5217\u8868\u6709\u70b9\u513f\u7c7b\u4f3c\u6570\u7ec4\uff0c\u901a\u8fc7\u4e00\u7247\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u6765\u5b58\u50a8\u6570\u636e\u3002\u4e0d\u8fc7\uff0c\u5b83\u8ddf\u6570\u7ec4\u4e0d\u540c\u7684\u4e00\u70b9\u662f\uff0c\u5b83\u5141\u8bb8\u5b58\u50a8\u7684\u6570\u636e\u5927\u5c0f\u4e0d\u540c\u3002\u6bcf\u4e2a\u8282\u70b9\u4e0a\u589e\u52a0\u4e00\u4e2alength\u5c5e\u6027\u6765\u8bb0\u5f55\u8fd9\u4e2a\u8282\u70b9\u7684\u957f\u5ea6\uff0c\u8fd9\u6837\u6bd4\u8f83\u65b9\u4fbf\u5730\u5f97\u5230\u4e0b\u4e00\u4e2a\u8282\u70b9\u7684\u4f4d\u7f6e\u3002<\/p>\n

        \n <\/p>\n
        \u4e0a\u56fe\u7684\u5404\u5b57\u6bb5\u542b\u4e49\u4e3a\uff1a<\/p>\n
          \n
        • zlbytes\uff1a\u5217\u8868\u7684\u603b\u957f\u5ea6<\/li>\n
        • zltail\uff1a\u6307\u5411\u6700\u672b\u5143\u7d20<\/li>\n
        • zllen\uff1a\u5143\u7d20\u7684\u4e2a\u6570<\/li>\n
        • entry\uff1a\u5143\u7d20\u7684\u5185\u5bb9\uff0c\u91cc\u9762\u8bb0\u5f55\u4e86\u524d\u4e00\u4e2aEntry\u7684\u957f\u5ea6\uff0c\u7528\u4e8e\u65b9\u4fbf\u53cc\u5411\u904d\u5386<\/li>\n
        • zlend\uff1a\u6052\u4e3a0xFF\uff0c\u4f5c\u4e3aziplist\u7684\u5b9a\u754c\u7b26<\/li>\n<\/ul>\n
          \u538b\u7f29\u5217\u8868\u4e0d\u53ea\u662flist\u7684\u5e95\u5c42\u5b9e\u73b0\uff0c\u4e5f\u662fhash\u7684\u5e95\u5c42\u5b9e\u73b0\u4e4b\u4e00\u3002\u5f53hash\u7684\u5143\u7d20\u4e2a\u6570\u5c11\u4e14\u5185\u5bb9\u957f\u5ea6\u4e0d\u5927\u65f6\uff0c\u4f7f\u7528\u538b\u7f29\u5217\u8868\u6765\u5b9e\u73b0\u3002<\/p>\n
          hash<\/strong><\/h3>\n
          hash\u5e95\u5c42\u6709\u4e24\u79cd\u5b9e\u73b0\uff1a\u538b\u7f29\u5217\u8868\u548c\u5b57\u5178(dict)\u3002\u538b\u7f29\u5217\u8868\u521a\u521a\u4e0a\u9762\u5df2\u7ecf\u4ecb\u7ecd\u8fc7\u4e86\uff0c\u4e0b\u9762\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u5b57\u5178\u7684\u6570\u636e\u7ed3\u6784\u3002<\/p>\n
          \u5b57\u5178<\/strong><\/p>\n
          \u5b57\u5178\u5176\u5b9e\u5c31\u7c7b\u4f3c\u4e8eJava\u8bed\u8a00\u4e2d\u7684Map,Python\u8bed\u8a00\u4e2d\u7684dict\u3002\u4e0eJava\u4e2d\u7684HashMap\u7c7b\u4f3c\uff0cRedis\u5e95\u5c42\u4e5f\u662f\u4f7f\u7528\u7684\u6563\u5217\u8868\u4f5c\u4e3a\u5b57\u5178\u7684\u5b9e\u73b0\uff0c\u89e3\u51b3hash\u51b2\u7a81\u4f7f\u7528\u7684\u662f\u94fe\u8868\u6cd5\u3002Redis\u540c\u6837\u4f7f\u7528\u4e86\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\u6765\u6301\u6709\u8fd9\u4e2a\u6563\u5217\u8868\uff1a<\/p>\n

          \n <\/p>\n
          \u5728\u952e\u589e\u52a0\u6216\u51cf\u5c11\u65f6\uff0c\u4f1a\u6269\u5bb9\u6216\u7f29\u5bb9\uff0c\u5e76\u4e14\u8fdb\u884crehash\uff0c\u6839\u636ehash\u503c\u91cd\u65b0\u8ba1\u7b97\u7d22\u5f15\u503c\u3002\u90a3\u5982\u679c\u8fd9\u4e2a\u5b57\u5178\u592a\u5927\u4e86\u600e\u4e48\u529e\u5462?<\/p>\n
          \u4e3a\u4e86\u89e3\u51b3\u4e00\u6b21\u6027\u6269\u5bb9\u8017\u65f6\u8fc7\u591a\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u5c06\u6269\u5bb9\u64cd\u4f5c\u7a7f\u63d2\u5728\u63d2\u5165\u64cd\u4f5c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5206\u6279\u5b8c\u6210\u3002\u5f53\u8d1f\u8f7d\u56e0\u5b50\u89e6\u8fbe\u9608\u503c\u4e4b\u540e\uff0c\u53ea\u7533\u8bf7\u65b0\u7a7a\u95f4\uff0c\u4f46\u5e76\u4e0d\u5c06\u8001\u7684\u6570\u636e\u642c\u79fb\u5230\u65b0\u6563\u5217\u8868\u4e2d\u3002\u5f53\u6709\u65b0\u6570\u636e\u8981\u63d2\u5165\u65f6\uff0c\u5c06\u65b0\u6570\u636e\u63d2\u5165\u65b0\u6563\u5217\u8868\u4e2d\uff0c\u5e76\u4e14\u4ece\u8001\u7684\u6563\u5217\u8868\u4e2d\u62ff\u51fa\u4e00\u4e2a\u6570\u636e\u653e\u5165\u5230\u65b0\u6563\u5217\u8868\u3002\u6bcf\u6b21\u63d2\u5165\u4e00\u4e2a\u6570\u636e\u5230\u6563\u5217\u8868\uff0c\u90fd\u91cd\u590d\u4e0a\u9762\u7684\u8fc7\u7a0b\u3002\u7ecf\u8fc7\u591a\u6b21\u63d2\u5165\u64cd\u4f5c\u4e4b\u540e\uff0c\u8001\u7684\u6563\u5217\u8868\u4e2d\u7684\u6570\u636e\u5c31\u4e00\u70b9\u4e00\u70b9\u5168\u90e8\u642c\u79fb\u5230\u65b0\u6563\u5217\u8868\u4e2d\u4e86\u3002\u8fd9\u6837\u6ca1\u6709\u4e86\u96c6\u4e2d\u7684\u4e00\u6b21\u4e00\u6b21\u6027\u6570\u636e\u642c\u79fb\uff0c\u63d2\u5165\u64cd\u4f5c\u5c31\u90fd\u53d8\u5f97\u5f88\u5feb\u4e86\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u4e5f\u88ab\u79f0\u4e3a\u6e10\u8fdb\u5f0frehash\u3002<\/p>\n
          set<\/h3>\n
          set\u91cc\u9762\u6ca1\u6709\u91cd\u590d\u7684\u96c6\u5408\u3002set\u7684\u5b9e\u73b0\u6bd4\u8f83\u7b80\u5355\u3002\u5982\u679c\u662f\u6574\u6570\u7c7b\u578b\uff0c\u5c31\u76f4\u63a5\u4f7f\u7528\u6574\u6570\u96c6\u5408intset\u3002\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u6765\u8f85\u52a9\uff0c\u901f\u5ea6\u8fd8\u662f\u633a\u5feb\u7684\u3002\u4e0d\u8fc7\u5728\u63d2\u5165\u7684\u65f6\u5019\uff0c\u7531\u4e8e\u8981\u79fb\u52a8\u5143\u7d20\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(N)\u3002<\/p>\n
          \u5982\u679c\u4e0d\u662f\u6574\u6570\u7c7b\u578b\uff0c\u5c31\u4f7f\u7528\u4e0a\u9762\u5728hash\u90a3\u4e00\u8282\u4ecb\u7ecd\u7684\u5b57\u5178\u3002key\u4e3aset\u7684\u503c\uff0cvalue\u4e3a\u7a7a\u3002<\/p>\n
          zset<\/h3>\n
          zset\u662f\u53ef\u6392\u5e8f\u7684set\u3002\u4e0ehash\u7684\u5b9e\u73b0\u65b9\u5f0f\u7c7b\u4f3c\uff0c\u5982\u679c\u5143\u7d20\u4e2a\u6570\u4e0d\u591a\u4e14\u4e0d\u5927\uff0c\u5c31\u4f7f\u7528\u538b\u7f29\u5217\u8868ziplist\u6765\u5b58\u50a8\u3002\u4e0d\u8fc7\u7531\u4e8ezset\u5305\u542b\u4e86score\u7684\u6392\u5e8f\u4fe1\u606f\uff0c\u6240\u4ee5\u5728ziplist\u5185\u90e8\uff0c\u662f\u6309\u7167score\u6392\u5e8f\u9012\u589e\u6765\u5b58\u50a8\u7684\u3002\u610f\u5473\u7740\u6bcf\u6b21\u63d2\u5165\u6570\u636e\u90fd\u8981\u79fb\u52a8\u4e4b\u540e\u7684\u6570\u636e\u3002<\/p>\n
          \u8df3\u8868<\/h4>\n
          \u8df3\u8868(skiplist)\u662f\u53e6\u4e00\u79cd\u5b9e\u73b0dict\u7684\u6570\u636e\u7ed3\u6784\u3002\u8df3\u8868\u662f\u5bf9\u94fe\u8868\u7684\u4e00\u4e2a\u589e\u5f3a\u3002\u6211\u4eec\u5728\u4f7f\u7528\u94fe\u8868\u7684\u65f6\u5019\uff0c\u5373\u4f7f\u5143\u7d20\u7684\u6709\u5e8f\u6392\u5217\u7684\uff0c\u4f46\u5982\u679c\u8981\u67e5\u627e\u4e00\u4e2a\u5143\u7d20\uff0c\u4e5f\u9700\u8981\u4ece\u5934\u4e00\u4e2a\u4e2a\u67e5\u627e\u4e0b\u53bb\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u662fO(N)\u3002\u800c\u8df3\u8868\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u8df3\u8dc3\u4e86\u4e00\u4e9b\u5143\u7d20\uff0c\u53ef\u4ee5\u62bd\u8c61\u591a\u5c42\u3002<\/p>\n
          \u5982\u4e0b\u56fe\u6240\u793a\uff0c\u6bd4\u5982\u6211\u4eec\u8981\u67e5\u627e8\uff0c\u5148\u5728\u6700\u4e0a\u5c42L2\u67e5\u627e\uff0c\u53d1\u73b0\u57281\u548c9\u4e4b\u95f4;\u7136\u540e\u53bbL1\u5c42\u67e5\u627e\uff0c\u53d1\u73b0\u57285\u548c9\u4e4b\u95f4;\u7136\u540e\u53bbL0\u67e5\u627e\uff0c\u53d1\u73b0\u57287\u548c9\u4e4b\u95f4\uff0c\u7136\u540e\u627e\u52308\u3002<\/p>\n
          \u5f53\u5143\u7d20\u6bd4\u8f83\u591a\u65f6\uff0c\u4f7f\u7528\u8df3\u8868\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u67e5\u627e\u7684\u6b21\u6570\u3002<\/p>\n

          \n <\/p>\n
          \u540clist\u7c7b\u4f3c\uff0cRedis\u5185\u90e8\u4e5f\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528\u7684\u8df3\u8868\uff0c\u800c\u662f\u4f7f\u7528\u4e86\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7ed3\u6784\u6765\u6301\u6709\u8df3\u8868\u3002\u4e0b\u56fe\u5de6\u8fb9\u84dd\u8272\u90e8\u5206\u662fskiplist\uff0c\u53f3\u8fb9\u662f4\u4e2azskiplistNode\u3002zskiplistNode\u5185\u90e8\u6709\u5f88\u591a\u5c42L1\u3001L2\u7b49\uff0c\u6307\u9488\u6307\u5411\u8fd9\u4e00\u5c42\u7684\u4e0b\u4e00\u4e2a\u7ed3\u70b9\u3002BW\u662f\u56de\u9000\u6307\u9488(backward)\uff0c\u7528\u4e8e\u67e5\u627e\u7684\u65f6\u5019\u56de\u9000\u3002\u7136\u540e\u4e0b\u9762\u662fscore\u548c\u5bf9\u8c61\u672c\u8eabobject\u3002<\/p>\n

          \n <\/p>\n
          \u603b\u7ed3<\/h3>\n
          Redis\u5bf9\u5916\u66b4\u9732\u7684\u662f\u5bf9\u8c61(\u6570\u636e\u7c7b\u578b)\uff0c\u800c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u662f\u7528\u4e00\u4e2aredisObject\u6301\u6709\uff0c\u901a\u8fc7\u4e0d\u540c\u7684\u7f16\u7801\uff0c\u6620\u5c04\u5230\u4e0d\u540c\u7684\u6570\u636e\u7ed3\u6784\u3002\u4ece\u6700\u5f00\u59cb\u7684\u90a3\u4e2a\u56fe\u53ef\u4ee5\u77e5\u9053\uff0c\u6709\u65f6\u5019\u4e0d\u540c\u5bf9\u8c61\u53ef\u80fd\u4f1a\u5e95\u5c42\u4f7f\u7528\u540c\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u6bd4\u5982\u538b\u7f29\u5217\u8868\u548c\u5b57\u5178\u7b49\u3002<\/p>\n
          \u5728\u4e86\u89e3\u6570\u636e\u7ed3\u6784\u540e\uff0c\u6211\u4eec\u5c31\u80fd\u591f\u66f4\u6e05\u695a\u5e94\u8be5\u9009\u7528\u4ec0\u4e48\u6837\u7684\u5bf9\u8c61\uff0c\u51fa\u73b0\u95ee\u9898\u65f6\u5e94\u8be5\u5982\u4f55\u4f18\u5316\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          Redis\u57fa\u672c\u7c7b\u578b\u53ca\u5176\u6570\u636e\u7ed3\u6784 ...<\/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-201556","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201556","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=201556"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201556\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}