{"id":201560,"date":"2025-05-10T11:49:27","date_gmt":"2025-05-10T03:49:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201560\/"},"modified":"2025-05-10T11:49:27","modified_gmt":"2025-05-10T03:49:27","slug":"redis%e6%95%99%e7%a8%8b%e5%85%ab%ef%bc%9a%e4%ba%8b%e5%8a%a1%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201560\/","title":{"rendered":"Redis\u6559\u7a0b(\u516b)\uff1a\u4e8b\u52a1\u8be6\u89e3"},"content":{"rendered":"

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

Redis\u6559\u7a0b(\u516b)\uff1a\u4e8b\u52a1\u8be6\u89e3<\/h1>\n

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

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300aRedis\u6559\u7a0b(\u516b)\uff1a\u4e8b\u52a1\u8be6\u89e3\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

\u4e00\u3001\u6982\u8ff0\uff1a<\/strong><\/p>\n

      \u548c\u4f17\u591a\u5176\u5b83\u6570\u636e\u5e93\u4e00\u6837\uff0cRedis\u4f5c\u4e3aNoSQL\u6570\u636e\u5e93\u4e5f\u540c\u6837\u63d0\u4f9b\u4e86\u4e8b\u52a1\u673a\u5236\u3002\u5728Redis\u4e2d\uff0cMULTI\/EXEC\/DISCARD\/WATCH\u8fd9\u56db\u4e2a\u547d\u4ee4\u662f\u6211\u4eec\u5b9e\u73b0\u4e8b\u52a1\u7684\u57fa\u77f3\u3002\u76f8\u4fe1\u5bf9\u6709\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5f00\u53d1\u7ecf\u9a8c\u7684\u5f00\u53d1\u8005\u800c\u8a00\u8fd9\u4e00\u6982\u5ff5\u5e76\u4e0d\u964c\u751f\uff0c\u5373\u4fbf\u5982\u6b64\uff0c\u6211\u4eec\u8fd8\u662f\u4f1a\u7b80\u8981\u7684\u5217\u51faRedis\u4e2d\u4e8b\u52a1\u7684\u5b9e\u73b0\u7279\u5f81\uff1a<\/p>\n

      1). \u5728\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u547d\u4ee4\u90fd\u5c06\u4f1a\u88ab\u4e32\u884c\u5316\u7684\u987a\u5e8f\u6267\u884c\uff0c\u4e8b\u52a1\u6267\u884c\u671f\u95f4\uff0cRedis\u4e0d\u4f1a\u518d\u4e3a\u5176\u5b83\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u63d0\u4f9b\u4efb\u4f55\u670d\u52a1\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u4e8b\u7269\u4e2d\u7684\u6240\u6709\u547d\u4ee4\u88ab\u539f\u5b50\u7684\u6267\u884c\u3002<\/p>\n

      2). \u548c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\u7684\u4e8b\u52a1\u76f8\u6bd4\uff0c\u5728Redis\u4e8b\u52a1\u4e2d\u5982\u679c\u6709\u67d0\u4e00\u6761\u547d\u4ee4\u6267\u884c\u5931\u8d25\uff0c\u5176\u540e\u7684\u547d\u4ee4\u4ecd\u7136\u4f1a\u88ab\u7ee7\u7eed\u6267\u884c\u3002
      3). \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7MULTI\u547d\u4ee4\u5f00\u542f\u4e00\u4e2a\u4e8b\u52a1\uff0c\u6709\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5f00\u53d1\u7ecf\u9a8c\u7684\u4eba\u53ef\u4ee5\u5c06\u5176\u7406\u89e3\u4e3a”BEGIN TRANSACTION”\u8bed\u53e5\u3002\u5728\u8be5\u8bed\u53e5\u4e4b\u540e\u6267\u884c\u7684\u547d\u4ee4\u90fd\u5c06\u88ab\u89c6\u4e3a\u4e8b\u52a1\u4e4b\u5185\u7684\u64cd\u4f5c\uff0c\u6700\u540e\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6267\u884cEXEC\/DISCARD\u547d\u4ee4\u6765\u63d0\u4ea4\/\u56de\u6eda\u8be5\u4e8b\u52a1\u5185\u7684\u6240\u6709\u64cd\u4f5c\u3002\u8fd9\u4e24\u4e2aRedis\u547d\u4ee4\u53ef\u88ab\u89c6\u4e3a\u7b49\u540c\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\u7684COMMIT\/ROLLBACK\u8bed\u53e5\u3002<\/p>\n

      4). \u5728\u4e8b\u52a1\u5f00\u542f\u4e4b\u524d\uff0c\u5982\u679c\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u51fa\u73b0\u901a\u8baf\u6545\u969c\u5e76\u5bfc\u81f4\u7f51\u7edc\u65ad\u5f00\uff0c\u5176\u540e\u6240\u6709\u5f85\u6267\u884c\u7684\u8bed\u53e5\u90fd\u5c06\u4e0d\u4f1a\u88ab\u670d\u52a1\u5668\u6267\u884c\u3002\u7136\u800c\u5982\u679c\u7f51\u7edc\u4e2d\u65ad\u4e8b\u4ef6\u662f\u53d1\u751f\u5728\u5ba2\u6237\u7aef\u6267\u884cEXEC\u547d\u4ee4\u4e4b\u540e\uff0c\u90a3\u4e48\u8be5\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u547d\u4ee4\u90fd\u4f1a\u88ab\u670d\u52a1\u5668\u6267\u884c\u3002<\/p>\n

      5). \u5f53\u4f7f\u7528Append-Only\u6a21\u5f0f\u65f6\uff0cRedis\u4f1a\u901a\u8fc7\u8c03\u7528\u7cfb\u7edf\u51fd\u6570write\u5c06\u8be5\u4e8b\u52a1\u5185\u7684\u6240\u6709\u5199\u64cd\u4f5c\u5728\u672c\u6b21\u8c03\u7528\u4e2d\u5168\u90e8\u5199\u5165\u78c1\u76d8\u3002\u7136\u800c\u5982\u679c\u5728\u5199\u5165\u7684\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7cfb\u7edf\u5d29\u6e83\uff0c\u5982\u7535\u6e90\u6545\u969c\u5bfc\u81f4\u7684\u5b95\u673a\uff0c\u90a3\u4e48\u6b64\u65f6\u4e5f\u8bb8\u53ea\u6709\u90e8\u5206\u6570\u636e\u88ab\u5199\u5165\u5230\u78c1\u76d8\uff0c\u800c\u53e6\u5916\u4e00\u90e8\u5206\u6570\u636e\u5374\u5df2\u7ecf\u4e22\u5931\u3002Redis\u670d\u52a1\u5668\u4f1a\u5728\u91cd\u65b0\u542f\u52a8\u65f6\u6267\u884c\u4e00\u7cfb\u5217\u5fc5\u8981\u7684\u4e00\u81f4\u6027\u68c0\u6d4b\uff0c\u4e00\u65e6\u53d1\u73b0\u7c7b\u4f3c\u95ee\u9898\uff0c\u5c31\u4f1a\u7acb\u5373\u9000\u51fa\u5e76\u7ed9\u51fa\u76f8\u5e94\u7684\u9519\u8bef\u63d0\u793a\u3002\u6b64\u65f6\uff0c\u6211\u4eec\u5c31\u8981\u5145\u5206\u5229\u7528Redis\u5de5\u5177\u5305\u4e2d\u63d0\u4f9b\u7684redis-check-aof\u5de5\u5177\uff0c\u8be5\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u5b9a\u4f4d\u5230\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u9519\u8bef\uff0c\u5e76\u5c06\u5df2\u7ecf\u5199\u5165\u7684\u90e8\u5206\u6570\u636e\u8fdb\u884c\u56de\u6eda\u3002\u4fee\u590d\u4e4b\u540e\u6211\u4eec\u5c31\u53ef\u4ee5\u518d\u6b21\u91cd\u65b0\u542f\u52a8Redis\u670d\u52a1\u5668\u4e86\u3002<\/p>\n

\u4e8c\u3001\u76f8\u5173\u547d\u4ee4\u5217\u8868\uff1a<\/strong><\/p>\n<\/p>\n\n\n\n\n\n\n\n\n
\u547d\u4ee4\u539f\u578b<\/strong><\/td>\n\u65f6\u95f4\u590d\u6742\u5ea6<\/strong><\/td>\n\u547d\u4ee4\u63cf\u8ff0<\/strong><\/td>\n\u8fd4\u56de\u503c<\/strong><\/td>\n<\/tr>\n
MULTI<\/strong><\/td>\n <\/td>\n\u7528\u4e8e\u6807\u8bb0\u4e8b\u52a1\u7684\u5f00\u59cb\uff0c\u5176\u540e\u6267\u884c\u7684\u547d\u4ee4\u90fd\u5c06\u88ab\u5b58\u5165\u547d\u4ee4\u961f\u5217\uff0c\u76f4\u5230\u6267\u884cEXEC\u65f6\uff0c\u8fd9\u4e9b\u547d\u4ee4\u624d\u4f1a\u88ab\u539f\u5b50\u7684\u6267\u884c\u3002<\/td>\n\u59cb\u7ec8\u8fd4\u56deOK<\/td>\n<\/tr>\n
EXEC<\/strong><\/td>\n <\/td>\n\u6267\u884c\u5728\u4e00\u4e2a\u4e8b\u52a1\u5185\u547d\u4ee4\u961f\u5217\u4e2d\u7684\u6240\u6709\u547d\u4ee4\uff0c\u540c\u65f6\u5c06\u5f53\u524d\u8fde\u63a5\u7684\u72b6\u6001\u6062\u590d\u4e3a\u6b63\u5e38\u72b6\u6001\uff0c\u5373\u975e\u4e8b\u52a1\u72b6\u6001\u3002\u5982\u679c\u5728\u4e8b\u52a1\u4e2d\u6267\u884c\u4e86WATCH\u547d\u4ee4\uff0c\u90a3\u4e48\u53ea\u6709\u5f53WATCH\u6240\u76d1\u63a7\u7684Keys\u6ca1\u6709\u88ab\u4fee\u6539\u7684\u524d\u63d0\u4e0b\uff0cEXEC\u547d\u4ee4\u624d\u80fd\u6267\u884c\u4e8b\u52a1\u961f\u5217\u4e2d\u7684\u6240\u6709\u547d\u4ee4\uff0c\u5426\u5219EXEC\u5c06\u653e\u5f03\u5f53\u524d\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u547d\u4ee4\u3002<\/td>\n\u539f\u5b50\u6027\u7684\u8fd4\u56de\u4e8b\u52a1\u4e2d\u5404\u6761\u547d\u4ee4\u7684\u8fd4\u56de\u7ed3\u679c\u3002\u5982\u679c\u5728\u4e8b\u52a1\u4e2d\u4f7f\u7528\u4e86WATCH\uff0c\u4e00\u65e6\u4e8b\u52a1\u88ab\u653e\u5f03\uff0cEXEC\u5c06\u8fd4\u56deNULL-multi-bulk\u56de\u590d\u3002<\/td>\n<\/tr>\n
DISCARD<\/strong><\/td>\n <\/td>\n\u56de\u6eda\u4e8b\u52a1\u961f\u5217\u4e2d\u7684\u6240\u6709\u547d\u4ee4\uff0c\u540c\u65f6\u518d\u5c06\u5f53\u524d\u8fde\u63a5\u7684\u72b6\u6001\u6062\u590d\u4e3a\u6b63\u5e38\u72b6\u6001\uff0c\u5373\u975e\u4e8b\u52a1\u72b6\u6001\u3002\u5982\u679cWATCH\u547d\u4ee4\u88ab\u4f7f\u7528\uff0c\u8be5\u547d\u4ee4\u5c06UNWATCH\u6240\u6709\u7684Keys\u3002<\/td>\n\u59cb\u7ec8\u8fd4\u56deOK\u3002<\/td>\n<\/tr>\n
WATCH<\/strong>key [key …]<\/td>\nO(1)<\/td>\n\u5728MULTI\u547d\u4ee4\u6267\u884c\u4e4b\u524d\uff0c\u53ef\u4ee5\u6307\u5b9a\u5f85\u76d1\u63a7\u7684Keys\uff0c\u7136\u800c\u5728\u6267\u884cEXEC\u4e4b\u524d\uff0c\u5982\u679c\u88ab\u76d1\u63a7\u7684Keys\u53d1\u751f\u4fee\u6539\uff0cEXEC\u5c06\u653e\u5f03\u6267\u884c\u8be5\u4e8b\u52a1\u961f\u5217\u4e2d\u7684\u6240\u6709\u547d\u4ee4\u3002<\/td>\n\u59cb\u7ec8\u8fd4\u56deOK\u3002<\/td>\n<\/tr>\n
UNWATCH<\/strong><\/td>\nO(1)<\/td>\n\u53d6\u6d88\u5f53\u524d\u4e8b\u52a1\u4e2d\u6307\u5b9a\u76d1\u63a7\u7684Keys\uff0c\u5982\u679c\u6267\u884c\u4e86EXEC\u6216DISCARD\u547d\u4ee4\uff0c\u5219\u65e0\u9700\u518d\u624b\u5de5\u6267\u884c\u8be5\u547d\u4ee4\u4e86\uff0c\u56e0\u4e3a\u5728\u6b64\u4e4b\u540e\uff0c\u4e8b\u52a1\u4e2d\u6240\u6709\u88ab\u76d1\u63a7\u7684Keys\u90fd\u5c06\u81ea\u52a8\u53d6\u6d88\u3002<\/td>\n\u59cb\u7ec8\u8fd4\u56deOK\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>\n

\u4e09\u3001\u547d\u4ee4\u793a\u4f8b\uff1a<\/strong><\/p>\n

   1. \u4e8b\u52a1\u88ab\u6b63\u5e38\u6267\u884c\uff1a
   \u4ee3\u7801\u5982\u4e0b:
    #\u5728Shell\u547d\u4ee4\u884c\u4e0b\u6267\u884cRedis\u7684\u5ba2\u6237\u7aef\u5de5\u5177\u3002
    \/> redis-cli
    #\u5728\u5f53\u524d\u8fde\u63a5\u4e0a\u542f\u52a8\u4e00\u4e2a\u65b0\u7684\u4e8b\u52a1\u3002
    redis 127.0.0.1:6379> multi
    OK
    #\u6267\u884c\u4e8b\u52a1\u4e2d\u7684\u7b2c\u4e00\u6761\u547d\u4ee4\uff0c\u4ece\u8be5\u547d\u4ee4\u7684\u8fd4\u56de\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u8be5\u547d\u4ee4\u5e76\u6ca1\u6709\u7acb\u5373\u6267\u884c\uff0c\u800c\u662f\u5b58\u4e8e\u4e8b\u52a1\u7684\u547d\u4ee4\u961f\u5217\u3002
    redis 127.0.0.1:6379> incr t1
    QUEUED
    #\u53c8\u6267\u884c\u4e00\u4e2a\u65b0\u7684\u547d\u4ee4\uff0c\u4ece\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u8be5\u547d\u4ee4\u4e5f\u88ab\u5b58\u4e8e\u4e8b\u52a1\u7684\u547d\u4ee4\u961f\u5217\u3002
    redis 127.0.0.1:6379> incr t2
    QUEUED
    #\u6267\u884c\u4e8b\u52a1\u547d\u4ee4\u961f\u5217\u4e2d\u7684\u6240\u6709\u547d\u4ee4\uff0c\u4ece\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u961f\u5217\u4e2d\u547d\u4ee4\u7684\u7ed3\u679c\u5f97\u5230\u8fd4\u56de\u3002
    redis 127.0.0.1:6379> exec
    1) (integer) 1
    2) (integer) 1
      
   2. \u4e8b\u52a1\u4e2d\u5b58\u5728\u5931\u8d25\u7684\u547d\u4ee4\uff1a
   \u4ee3\u7801\u5982\u4e0b:
    #\u5f00\u542f\u4e00\u4e2a\u65b0\u7684\u4e8b\u52a1\u3002
    redis 127.0.0.1:6379> multi
    OK
    #\u8bbe\u7f6e\u952ea\u7684\u503c\u4e3astring\u7c7b\u578b\u76843\u3002
    redis 127.0.0.1:6379> set a 3
    QUEUED
    #\u4ece\u952ea\u6240\u5173\u8054\u7684\u503c\u7684\u5934\u90e8\u5f39\u51fa\u5143\u7d20\uff0c\u7531\u4e8e\u8be5\u503c\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u800clpop\u547d\u4ee4\u4ec5\u80fd\u7528\u4e8eList\u7c7b\u578b\uff0c\u56e0\u6b64\u5728\u6267\u884cexec\u547d\u4ee4\u65f6\uff0c\u8be5\u547d\u4ee4\u5c06\u4f1a\u5931\u8d25\u3002
    redis 127.0.0.1:6379> lpop a
    QUEUED
    #\u518d\u6b21\u8bbe\u7f6e\u952ea\u7684\u503c\u4e3a\u5b57\u7b26\u4e324\u3002
    redis 127.0.0.1:6379> set a 4
    QUEUED
    #\u83b7\u53d6\u952ea\u7684\u503c\uff0c\u4ee5\u4fbf\u786e\u8ba4\u8be5\u503c\u662f\u5426\u88ab\u4e8b\u52a1\u4e2d\u7684\u7b2c\u4e8c\u4e2aset\u547d\u4ee4\u8bbe\u7f6e\u6210\u529f\u3002
    redis 127.0.0.1:6379> get a
    QUEUED
    #\u4ece\u7ed3\u679c\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u4e8b\u52a1\u4e2d\u7684\u7b2c\u4e8c\u6761\u547d\u4ee4lpop\u6267\u884c\u5931\u8d25\uff0c\u800c\u5176\u540e\u7684set\u548cget\u547d\u4ee4\u5747\u6267\u884c\u6210\u529f\uff0c\u8fd9\u4e00\u70b9\u662fRedis\u7684\u4e8b\u52a1\u4e0e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\u7684\u4e8b\u52a1\u4e4b\u95f4\u6700\u4e3a\u91cd\u8981\u7684\u5dee\u522b\u3002
    redis 127.0.0.1:6379> exec
    1) OK
    2) (error) ERR Operation against a key holding the wrong kind of value
    3) OK
    4) “4”<\/p>\n

   3. \u56de\u6eda\u4e8b\u52a1\uff1a
   \u4ee3\u7801\u5982\u4e0b:
    #\u4e3a\u952et2\u8bbe\u7f6e\u4e00\u4e2a\u4e8b\u52a1\u6267\u884c\u524d\u7684\u503c\u3002
    redis 127.0.0.1:6379> set t2 tt
    OK
    #\u5f00\u542f\u4e00\u4e2a\u4e8b\u52a1\u3002
    redis 127.0.0.1:6379> multi
    OK
    #\u5728\u4e8b\u52a1\u5185\u4e3a\u8be5\u952e\u8bbe\u7f6e\u4e00\u4e2a\u65b0\u503c\u3002
    redis 127.0.0.1:6379> set t2 ttnew
    QUEUED
    #\u653e\u5f03\u4e8b\u52a1\u3002
    redis 127.0.0.1:6379> discard
    OK
    #\u67e5\u770b\u952et2\u7684\u503c\uff0c\u4ece\u7ed3\u679c\u4e2d\u53ef\u4ee5\u770b\u51fa\u8be5\u952e\u7684\u503c\u4ecd\u4e3a\u4e8b\u52a1\u5f00\u59cb\u4e4b\u524d\u7684\u503c\u3002
    redis 127.0.0.1:6379> get t2
    “tt”<\/p>\n

\u56db\u3001WATCH\u547d\u4ee4\u548c\u57fa\u4e8eCAS\u7684\u4e50\u89c2\u9501\uff1a<\/strong><\/p>\n

      \u5728Redis\u7684\u4e8b\u52a1\u4e2d\uff0cWATCH\u547d\u4ee4\u53ef\u7528\u4e8e\u63d0\u4f9bCAS(check-and-set)\u529f\u80fd\u3002\u5047\u8bbe\u6211\u4eec\u901a\u8fc7WATCH\u547d\u4ee4\u5728\u4e8b\u52a1\u6267\u884c\u4e4b\u524d\u76d1\u63a7\u4e86\u591a\u4e2aKeys\uff0c\u5018\u82e5\u5728WATCH\u4e4b\u540e\u6709\u4efb\u4f55Key\u7684\u503c\u53d1\u751f\u4e86\u53d8\u5316\uff0cEXEC\u547d\u4ee4\u6267\u884c\u7684\u4e8b\u52a1\u90fd\u5c06\u88ab\u653e\u5f03\uff0c\u540c\u65f6\u8fd4\u56deNull multi-bulk\u5e94\u7b54\u4ee5\u901a\u77e5\u8c03\u7528\u8005\u4e8b\u52a1\u6267\u884c\u5931\u8d25\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u518d\u6b21\u5047\u8bbeRedis\u4e2d\u5e76\u672a\u63d0\u4f9bincr\u547d\u4ee4\u6765\u5b8c\u6210\u952e\u503c\u7684\u539f\u5b50\u6027\u9012\u589e\uff0c\u5982\u679c\u8981\u5b9e\u73b0\u8be5\u529f\u80fd\uff0c\u6211\u4eec\u53ea\u80fd\u81ea\u884c\u7f16\u5199\u76f8\u5e94\u7684\u4ee3\u7801\u3002\u5176\u4f2a\u7801\u5982\u4e0b\uff1a
   \u4ee3\u7801\u5982\u4e0b:
      val = GET mykey
      val = val + 1
      SET mykey $val
  
      \u4ee5\u4e0a\u4ee3\u7801\u53ea\u6709\u5728\u5355\u8fde\u63a5\u7684\u60c5\u51b5\u4e0b\u624d\u53ef\u4ee5\u4fdd\u8bc1\u6267\u884c\u7ed3\u679c\u662f\u6b63\u786e\u7684\uff0c\u56e0\u4e3a\u5982\u679c\u5728\u540c\u4e00\u65f6\u523b\u6709\u591a\u4e2a\u5ba2\u6237\u7aef\u5728\u540c\u65f6\u6267\u884c\u8be5\u6bb5\u4ee3\u7801\uff0c\u90a3\u4e48\u5c31\u4f1a\u51fa\u73b0\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e2d\u7ecf\u5e38\u51fa\u73b0\u7684\u4e00\u79cd\u9519\u8bef\u573a\u666f–\u7ade\u6001\u4e89\u7528(race condition)\u3002\u6bd4\u5982\uff0c\u5ba2\u6237\u7aefA\u548cB\u90fd\u5728\u540c\u4e00\u65f6\u523b\u8bfb\u53d6\u4e86mykey\u7684\u539f\u6709\u503c\uff0c\u5047\u8bbe\u8be5\u503c\u4e3a10\uff0c\u6b64\u540e\u4e24\u4e2a\u5ba2\u6237\u7aef\u53c8\u5747\u5c06\u8be5\u503c\u52a0\u4e00\u540eset\u56deRedis\u670d\u52a1\u5668\uff0c\u8fd9\u6837\u5c31\u4f1a\u5bfc\u81f4mykey\u7684\u7ed3\u679c\u4e3a11\uff0c\u800c\u4e0d\u662f\u6211\u4eec\u8ba4\u4e3a\u768412\u3002\u4e3a\u4e86\u89e3\u51b3\u7c7b\u4f3c\u7684\u95ee\u9898\uff0c\u6211\u4eec\u9700\u8981\u501f\u52a9WATCH\u547d\u4ee4\u7684\u5e2e\u52a9\uff0c\u89c1\u5982\u4e0b\u4ee3\u7801\uff1a
   \u4ee3\u7801\u5982\u4e0b:
      WATCH mykey
      val = GET mykey
      val = val + 1
      MULTI
      SET mykey $val
      EXEC
  
      \u548c\u6b64\u524d\u4ee3\u7801\u4e0d\u540c\u7684\u662f\uff0c\u65b0\u4ee3\u7801\u5728\u83b7\u53d6mykey\u7684\u503c\u4e4b\u524d\u5148\u901a\u8fc7WATCH\u547d\u4ee4\u76d1\u63a7\u4e86\u8be5\u952e\uff0c\u6b64\u540e\u53c8\u5c06set\u547d\u4ee4\u5305\u56f4\u5728\u4e8b\u52a1\u4e2d\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u6709\u6548\u7684\u4fdd\u8bc1\u6bcf\u4e2a\u8fde\u63a5\u5728\u6267\u884cEXEC\u4e4b\u524d\uff0c\u5982\u679c\u5f53\u524d\u8fde\u63a5\u83b7\u53d6\u7684mykey\u7684\u503c\u88ab\u5176\u5b83\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u4fee\u6539\uff0c\u90a3\u4e48\u5f53\u524d\u8fde\u63a5\u7684EXEC\u547d\u4ee4\u5c06\u6267\u884c\u5931\u8d25\u3002\u8fd9\u6837\u8c03\u7528\u8005\u5728\u5224\u65ad\u8fd4\u56de\u503c\u540e\u5c31\u53ef\u4ee5\u83b7\u6089val\u662f\u5426\u88ab\u91cd\u65b0\u8bbe\u7f6e\u6210\u529f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Redis\u6559\u7a0b(\u516b)\uff1a\u4e8b\u52a1\u8be6\u89e3 ...<\/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-201560","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201560","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=201560"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201560\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}