{"id":43610,"date":"2024-12-01T15:26:07","date_gmt":"2024-12-01T07:26:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/43610\/"},"modified":"2024-12-01T15:26:07","modified_gmt":"2024-12-01T07:26:07","slug":"%e4%b8%80%e6%96%87%e8%af%a6%e8%a7%a3%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8redis%e5%ae%9e%e7%8e%b0%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/43610\/","title":{"rendered":"\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"

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

\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h1>\n

<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u9501\u3001Redis\u5206\u5e03\u5f0f\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n

1. \u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501<\/h2>\n

\u5f53\u6211\u4eec\u5728\u7f16\u5199\u591a\u7ebf\u7a0b\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u4e0d\u540c\u7684\u7ebf\u7a0b\u53ef\u80fd\u4f1a\u53d1\u751f\u8d44\u6e90\u7684\u4e89\u593a\uff0c\u4e3a\u4e86\u907f\u514d\u8d44\u6e90\u4e89\u593a\u9020\u6210\u7684\u9519\u8bef\uff0c\u6211\u4eec\u4f1a\u5bf9\u8d44\u6e90\u4e0a\u9501\uff0c\u53ea\u6709\u83b7\u5f97\u9501\u7684\u7ebf\u7a0b\u624d\u80fd\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u3002<\/p>\n

\u8fdb\u7a0b\u4e2d\u7684\u9501\uff0c\u672c\u8d28\u5c31\u662f\u5185\u5b58\u4e2d\u4e00\u4e2a\u53d8\u91cf\uff0c\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u67d0\u4e2a\u64cd\u4f5c\u7533\u8bf7\u52a0\u9501\u65f6\uff0c\u5982\u679c\u80fd\u6210\u529f\u628a\u4ee3\u8868\u9501\u7684\u53d8\u91cf\u503c\u8bbe\u7f6e\u4e3a1\uff0c\u5219\u8868\u793a\u83b7\u5f97\u4e86\u9501\uff0c\u5176\u4ed6\u7ebf\u7a0b\u60f3\u8981\u83b7\u5f97\u9501\u65f6\u4f1a\u963b\u585e\uff0c\u800c\u62e5\u6709\u9501\u7684\u7ebf\u7a0b\u6267\u884c\u5b8c\u64cd\u4f5c\u540e\uff0c\u518d\u628a\u9501\u7684\u503c\u8bbe\u7f6e\u4e3a0\uff0c\u5219\u8868\u793a\u91ca\u653e\u4e86\u9501\u3002<\/p>\n

\"\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u63d2\u56fe\"<\/p>\n

\u4e0a\u9762\u6211\u4eec\u8bf4\u7684\u662f\u5728\u4e00\u53f0\u670d\u52a1\u5668\u7684\u8fdb\u7a0b\u5185\u4e0d\u540c\u7ebf\u7a0b\u4e4b\u95f4\u7684\u9501\uff0c\u8fd9\u4e2a\u9501\u662f\u653e\u5728\u5185\u5b58\u4e2d\u7684\uff0c\u800c\u5bf9\u4e8e\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u4e0d\u540c\u7684\u5e94\u7528(\u8fdb\u7a0b\u6216\u7ebf\u7a0b)\u90e8\u7f72\u5728\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u8fd9\u6837\u5c31\u4e0d\u80fd\u901a\u8fc7\u5185\u5b58\u4e2d\u7684\u53d8\u91cf\u6765\u8868\u793a\u9501\u3002<\/p>\n

\u5373\u7136\u5728\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u53ef\u4ee5\u901a\u8fc7\u5185\u5b58\u8fd9\u5757\u5171\u4eab\u7684\u7a7a\u95f4\u6765\u8868\u793a\u9501\uff0c\u90a3\u4e48\u5bf9\u4e8e\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u53ef\u4ee5\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\u6765\u5b58\u50a8\u4e00\u4e2a\u5171\u4eab\u9501\uff0c\u8fd9\u5c31\u662f\u5206\u5e03\u5f0f\u9501\uff0c\u800cRedis<\/code>\u4f5c\u4e3a\u5185\u5b58\u6570\u636e\u5e93\uff0c\u6267\u884c\u975e\u5e38\u5feb\uff0c\u5f88\u9002\u5408\u4f5c\u4e3a\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\u3002<\/p>\n

\"\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u63d2\u56fe1\"<\/p>\n

2. \u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501<\/h2>\n

\u5bf9\u4e8e\u4e00\u4e2a\u9501\u6765\u8bf4\uff0c\u5176\u5b9e\u53ea\u6709\u4e24\u4e2a\u64cd\u4f5c\uff0c\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0c\u4e0b\u9762\u6211\u4eec\u770b\u6765\u770b\u901a\u8fc7Redis<\/code>\u8981\u600e\u4e48\u5b9e\u73b0\uff1f<\/p>\n

2.1 \u52a0\u9501<\/h3>\n

Redis<\/code>\u7684setnx<\/code>\u547d\u4ee4\u4f1a\u5224\u65ad\u952e\u503c\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u5b58\u5728\u5219\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\uff0c\u5e76\u8fd4\u56de0\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u521b\u5efa\u5e76\u8d4b\u503c\uff0c\u5e76\u8fd4\u56de1\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u6267\u884csetnx<\/code>\u4e3a\u4e00\u4e2a\u4ee3\u8868\u9501\u952e\u8bbe\u7f6e\u503c\uff0c\u5982\u679c\u80fd\u8bbe\u7f6e\u6210\u529f\uff0c\u5219\u8868\u793a\u83b7\u5f97\u9501\uff0c\u5931\u8d25\u5219\u65e0\u6cd5\u83b7\u5f97\u9501\u3002<\/p>\n

# \u4f7f\u7528key\u4e3alock\u6765\u8868\u793a\u4e00\u4e2a\u9501\nsetnx lock 1 <\/pre>\n
2.2 \u91ca\u653e\u9501<\/h3>\n
\u5f53\u6267\u884c\u597d\u64cd\u4f5c\u4e4b\u540e\uff0c\u8981\u91ca\u653e\u9501\u7684\u65f6\u5019\u76f4\u63a5\u628aRedis<\/code>\u91cc\u7684\u952e\u503clock<\/code>\u5220\u9664\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u6837\u5176\u4ed6\u8fdb\u7a0b\u624d\u80fd\u901a\u8fc7setnx<\/code>\u547d\u4ee4\u91cd\u65b0\u8bbe\u7f6e\u5e76\u83b7\u5f97\u8be5\u9501\u3002<\/p>\n
# \u91ca\u653e\u9501\ndel lock<\/pre>\n
\u901a\u8fc7\u4e0a\u9762\u4e24\u4e2a\u547d\u4ee4\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5206\u5e03\u5f0f\u9501\uff0c\u4f46\u8fd9\u91cc\u5c31\u51fa\u73b0\u4e86\u4e00\u4e2a\u95ee\u9898\uff1a\u5982\u679c\u4e00\u4e2a\u8fdb\u7a0b\u901a\u8fc7setnx<\/code>\u547d\u4ee4\u52a0\u9501\u4e4b\u540e\uff0c\u5728\u6267\u884c\u5177\u4f53\u64cd\u4f5c\u51fa\u9519\u4e86\uff0c\u6ca1\u6709\u529e\u6cd5\u53ca\u65f6\u91ca\u653e\u9501\uff0c\u90a3\u4e48\u5176\u4ed6\u8fdb\u7a0b\u5c31\u65e0\u6cd5\u83b7\u5f97\u8be5\u9501\uff0c\u7cfb\u7edf\u4fbf\u65e0\u6cd5\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\uff0c\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u529e\u6cd5\u5c31\u662f\u4e3a\u9501\u8bbe\u7f6e\u4e00\u4e2a\u6709\u6548\u671f\uff0c\u5728\u8fd9\u4e2a\u6709\u6548\u671f\u4e4b\u540e\uff0c\u81ea\u52a8\u91ca\u653e\u9501\u3002<\/p>\n
2.3 \u7ed9\u9501\u8bbe\u7f6e\u6709\u6548\u671f<\/h3>\n
\u7ed9\u9501\u8bbe\u7f6e\u6709\u6548\u671f\u975e\u5e38\u7b80\u5355\uff0c\u76f4\u63a5\u4f7f\u7528Redis<\/code>\u7684expire<\/code>\u547d\u4ee4\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\uff1a<\/p>\n
# \u52a0\u9501\nsetnx lock 1 \n# \u7ed9\u9501\u8bbe\u7f6e10s\u6709\u6548\u671f\nexpire lock 10 <\/pre>\n
\u4f46\u662f\uff0c\u73b0\u5728\u53c8\u51fa\u73b0\u53e6\u4e00\u4e2a\u95ee\u9898\u4e86\uff0c\u5982\u679c\u6211\u4eec\u5728\u8bbe\u7f6e\u4e86\u9501\u4e4b\u540e\uff0c\u6267\u884cexpire<\/code>\u547d\u4ee4\u4e4b\u524d\u8be5\u8fdb\u7a0b\u6302\u6389\u4e86\uff0c\u90a3\u4e48expire<\/code>\u5c31\u6ca1\u6709\u6267\u884c\u6210\u529f\uff0c\u9501\u4e00\u6837\u662f\u6ca1\u6709\u88ab\u91ca\u653e\u6389\u7684\uff0c\u6240\u4ee5\u4e00\u5b9a\u8981\u4fdd\u8bc1\u4e0a\u9762\u4e24\u4e2a\u547d\u4ee4\u8981\u4e00\u8d77\u6267\u884c\uff0c\u600e\u4e48\u4fdd\u8bc1\u5462\uff1f<\/p>\n
\u6709\u4e24\u4e2a\u65b9\u6cd5\uff0c\u4e00\u4e2a\u662f\u4f7f\u7528LUA<\/code>\u8bed\u8a00\u7f16\u5199\u7684\u811a\u672c\uff0c\u53e6\u4e00\u4e2a\u662f\u4f7f\u7528Redis<\/code>\u7684set<\/code>\u547d\u4ee4\uff0cset<\/code>\u547d\u4ee4\u540e\u9762\u8ddfnx<\/code>\u53c2\u6570\u540e\uff0c\u6267\u884c\u7684\u6548\u679c\u4e0esetnx<\/code>\u4e00\u81f4\uff0c\u4e14set<\/code>\u547d\u4ee4\u53ef\u4ee5\u8ddfex<\/code>\u53c2\u6570\u6765\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528set<\/code>\u547d\u4ee4\u628asetnx<\/code>\u548cexpire<\/code>\u4e24\u4e2a\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u6267\u884c\u7684\u539f\u5b50\u6027\u4e86\u3002<\/p>\n
# \u5224\u65ad\u662f\u5426\u952e\u503c\u662f\u5426\u5b58\u5728\uff0cex\u540e\u9762\u8ddf\u7740\u7684\u662f\u952e\u503c\u7684\u6709\u6548\u671f,10s\nset lock 1 nx ex 10 <\/pre>\n
\u89e3\u51b3\u4e86\u9501\u7684\u6709\u6548\u95ee\u9898\uff0c\u73b0\u5728\u6211\u4eec\u518d\u6765\u770b\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n
\"\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u63d2\u56fe2\"<\/p>\n
\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u73b0\u5728\u6709A<\/code>\uff0cB<\/code>\uff0cC<\/code>\u4e09\u4e2a\u4e0d\u540c\u670d\u52a1\u5668\u4e0a\u7684\u8fdb\u7a0b\u5728\u6267\u884c\u67d0\u4e2a\u64cd\u4f5c\u90fd\u9700\u8981\u83b7\u5f97\u9501\uff0c\u6267\u884c\u540e\u8981\u91ca\u653e\u9501\u3002<\/p>\n
\u73b0\u5728\u7684\u60c5\u51b5\u662f\u8fdb\u7a0bA<\/code>\u6267\u884c\u7b2c2\u6b65\u65f6\u5361\u987f\u4e86(\u4e0a\u9762\u7eff\u8272\u533a\u57df\u6240\u793a)\uff0c\u4e14\u65f6\u95f4\u8d85\u51fa\u4e86\u9501\u6709\u6548\u671f\uff0c\u6240\u4ee5\u8fdb\u7a0bA<\/code>\u8bbe\u7f6e\u7684\u9501\u81ea\u52a8\u91ca\u653e\u4e86\uff0c\u8fd9\u65f6\u5019\u8fdb\u7a0bB<\/code>\u83b7\u5f97\u4e86\u9501\uff0c\u5e76\u5f00\u59cb\u6267\u884c\u64cd\u4f5c\uff0c\u4f46\u7531\u4e8e\u8fdb\u7a0bA<\/code>\u53ea\u662f\u5361\u987f\u4e86\u800c\u5df2\uff0c\u6240\u4ee5\u4f1a\u7ee7\u7eed\u6267\u884c\u7684\u65f6\u5019\uff0c\u5728\u7b2c3\u6b65\u7684\u65f6\u5019\u4f1a\u624b\u52a8\u91ca\u653e\u9501\uff0c\u4f46\u662f\u8fd9\u4e2a\u65f6\u5019\uff0c\u9501\u7531\u7ebf\u7a0bB<\/code>\u6240\u62e5\u6709\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fdb\u7a0bA\u5220\u9664\u7684\u4e0d\u662f\u81ea\u5df1\u7684\u9501\uff0c\u800c\u8fdb\u7a0bB\u7684\u9501<\/strong>\uff0c\u8fd9\u65f6\u5019\u8fdb\u7a0bB<\/code>\u8fd8\u6ca1\u6267\u884c\u5b8c\uff0c\u4f46\u9501\u88ab\u91ca\u653e\u540e\uff0c\u8fdb\u7a0bC<\/code>\u53ef\u4ee5\u52a0\u9501\uff0c\u4e5f\u5c31\u662f\u8bf4\u7531\u4e8e\u8fdb\u7a0bA\u5361\u987f\u91ca\u653e\u9519\u4e86\u9501\uff0c\u5bfc\u81f4\u8fdb\u7a0bB\u548c\u8fdb\u7a0bC\u53ef\u4ee5\u540c\u65f6\u83b7\u5f97\u9501<\/strong>\u3002<\/p>\n
\u600e\u4e48\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u5462\uff1f\u5982\u4f55\u533a\u5206\u5176\u4ed6\u8fdb\u7a0b\u7684\u9501\uff0c\u907f\u514d\u5220\u9664\u5176\u4ed6\u8fdb\u7a0b\u7684\u9501\u5462\uff1f\u7b54\u6848\u5c31\u662f\u6bcf\u4e2a\u8fdb\u7a0b\u5728\u52a0\u9501\u7684\u65f6\u5019\uff0c\u7ed9\u9501\u8bbe\u7f6e\u4e00\u4e2a\u552f\u4e00\u503c\uff0c\u5e76\u5728\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u5224\u65ad\u662f\u4e0d\u662f\u81ea\u5df1\u8bbe\u7f6e\u7684\u9501\u3002<\/p>\n
2.4 \u7ed9\u9501\u8bbe\u7f6e\u552f\u4e00\u503c<\/h3>\n
\u7ed9\u9501\u8bbe\u7f6e\u552f\u4e00\u503c\u7684\u65f6\u5019\uff0c\u4e00\u6837\u662f\u4f7f\u7528set<\/code>\u547d\u4ee4\uff0c\u552f\u4e00\u7684\u4e0d\u540c\u662f\u5c06\u952e\u503c1\u6539\u4e3a\u4e00\u4e2a\u968f\u673a\u751f\u6210\u7684\u552f\u4e00\u503c\uff0c\u6bd4\u5982uuid\u3002<\/p>\n
 # rand_uid\u8868\u793a\u552f\u4e00id\nset lock rand_id nx ex 10<\/pre>\n
\u5f53\u9501\u91cc\u7684\u503c\u7531\u8fdb\u7a0b\u8bbe\u7f6e\u540e\uff0c\u91ca\u653e\u9501\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5224\u65ad\u9501\u662f\u4e0d\u662f\u81ea\u5df1\u7684\uff0c\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
    \n
  • \u901a\u8fc7Redis<\/code>\u7684get<\/code>\u547d\u4ee4\u83b7\u5f97\u9501\u7684\u503c<\/li>\n
  • \u6839\u636e\u83b7\u5f97\u7684\u503c\uff0c\u5224\u65ad\u9501\u662f\u4e0d\u662f\u81ea\u5df1\u8bbe\u7f6e\u7684<\/li>\n
  • \u5982\u679c\u662f\uff0c\u901a\u8fc7del<\/code>\u547d\u4ee4\u91ca\u653e\u9501\u3002<\/li>\n<\/ul>\n
    \u6b64\u65f6\u6211\u4eec\u770b\u5230\uff0c\u91ca\u653e\u9501\u9700\u8981\u6267\u884c\u4e09\u4e2a\u64cd\u4f5c\uff0c\u5982\u679c\u4e09\u4e2a\u64cd\u4f5c\u4f9d\u6b21\u6267\u884c\u7684\u8bdd\uff0c\u662f\u6ca1\u6709\u529e\u6cd5\u4fdd\u8bc1\u539f\u5b50\u6027\u7684\uff0c\u6bd4\u5982\u8fdb\u7a0bA<\/code>\u5728\u6267\u884c\u5230\u7b2c2\u6b65\u540e\uff0c\u51c6\u5907\u5f00\u59cb\u6267\u884cdel<\/code>\u547d\u4ee4\u65f6\uff0c\u800c\u9501\u7531\u65f6\u6709\u6548\u671f\u5230\u4e86\uff0c\u88ab\u81ea\u52a8\u91ca\u653e\u4e86\uff0c\u5e76\u88ab\u5176\u4ed6\u670d\u52a1\u5668\u4e0a\u7684\u8fdb\u7a0bB<\/code>\u83b7\u5f97\u9501\uff0c\u4f46\u8fd9\u65f6\u5019\u7ebf\u7a0bA<\/code>\u6267\u884cdel<\/code>\u8fd8\u662f\u628a\u7ebf\u7a0bB<\/code>\u7684\u9501\u7ed9\u5220\u6389\u4e86\u3002<\/p>\n
    \u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u529e\u6cd5\u5c31\u662f\u4fdd\u8bc1\u4e0a\u8ff0\u4e09\u4e2a\u64cd\u4f5c\u6267\u884c\u7684\u539f\u5b50\u6027\uff0c\u5373\u5728\u6267\u884c\u91ca\u653e\u9501\u7684\u4e09\u4e2a\u64cd\u4f5c\u4e2d\uff0c\u5176\u4ed6\u8fdb\u7a0b\u4e0d\u53ef\u4ee5\u83b7\u5f97\u9501\uff0c\u60f3\u8981\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u9700\u8981\u4f7f\u7528\u5230LUA\u811a\u672c\u3002<\/p>\n
    2.5 \u901a\u8fc7LUA\u811a\u672c\u5b9e\u73b0\u91ca\u653e\u9501\u7684\u539f\u5b50\u6027<\/h3>\n
    Redis<\/code>\u652f\u6301LUA<\/code>\u811a\u672c\uff0cLUA<\/code>\u811a\u91cc\u7684\u4ee3\u7801\u6267\u884c\u7684\u65f6\u5019\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u4e0d\u4f1a\u88ab\u6267\u884c\uff0c\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u539f\u5b50\u6027\u64cd\u4f5c\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u811a\u672c\u8fdb\u884c\u9501\u7684\u91ca\u653e\uff1a<\/p>\n
    if redis.call(\"get\",KEYS[1]) == ARGV[1] then \n  return redis.call(\"del\",KEYS[1])\nelse \n  return 0\nend<\/pre>\n
    \u5c06\u4e0a\u8ff0\u811a\u672c\u4fdd\u5b58\u4e3a\u811a\u672c\u540e\uff0c\u53ef\u4ee5\u8c03\u7528Redis<\/code>\u5ba2\u6237\u7aef\u547d\u4ee4redis-cli<\/code>\u6765\u6267\u884c\uff0c\u5982\u4e0b\uff1a<\/p>\n
    # lock\u4e3akey,rand_id\u8868\u793akey\u91cc\u4fdd\u5b58\u7684\u503c\nredis-cli --eval unlock.lua lock , rand_id <\/pre>\n
    3. \u5c0f\u7ed3<\/h2>\n
    \u65e0\u8bba\u662f\u672c\u5730\u9501\u8fd8\u662f\u5206\u5e03\u5f0f\u9501\uff0c\u9501\u7684\u672c\u8d28\u5c31\u662f\u4e00\u4e2a\u5171\u4eab\u7684\u53d8\u91cf\uff0c\u53ea\u662f\u5728\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u65f6\u5019\uff0c\u628a\u8fd9\u4e2a\u53d8\u91cf\u79fb\u5230\u4e86Redis<\/code>\u670d\u52a1\u5668\u6240\u5728\u7684\u5185\u5b58\u4e2d\u3002<\/p>\n
    \u5728\u4e0a\u9762\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u8fc7\u7a0b\u4e2d\u6211\u4eec\u78b0\u5230\u4e86\u4ee5\u4e0b\u51e0\u4e2a\u95ee\u9898\uff1a<\/strong><\/p>\n
      \n
    • \u5982\u4f55\u4fdd\u8bc1\u52a0\u9501\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff1f<\/li>\n
    • \u5982\u4f55\u4fdd\u8bc1\u8fdb\u7a0b\u5d29\u6e83\u81ea\u52a8\u91ca\u653e\u9501\uff1f<\/li>\n
    • \u5982\u4f55\u907f\u514d\u5220\u9519\u5176\u4ed6\u8fdb\u7a0b\u7684\u9501\uff1f<\/li>\n
    • \u5982\u4f55\u4fdd\u8bc1\u91ca\u653e\u9501\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff1f<\/li>\n<\/ul>\n
      \u5728\u89e3\u51b3\u4e0a\u8ff0\u95ee\u9898\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4e5f\u4e00\u6b65\u6b65\u5b8c\u5584\u4e00\u4e2a\u53ef\u4ee5\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u5e94\u7528\u7684Redis<\/code>\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301golang\u5b66\u4e60\u7f51\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8golang\u5b66\u4e60\u7f51\u516c\u4f17\u53f7\u3002<\/p>\n
          \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1a\u811a\u672c\u4e4b\u5bb6 \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664  <\/p>\n
      \n
      \n <\/dt>\n
      \n   Redis\u6e90\u7801\u4e0e\u8bbe\u8ba1\u5256\u6790\u4e4b\u7f51\u7edc\u8fde\u63a5\u5e93\n <\/dd>\n<\/dl>\n
      \n
      \n <\/dt>\n
      \n   Redis\u8fc7\u671f\u5220\u9664\u7b56\u7565\u4e0e\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      \u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501 0\u6d4f\u89c8 \u6536\u85cf \u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u4e00\u6587\u8be6\u89e3\u5982\u4f55\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\u9501\u3001Redis\u5206\u5e03\u5f0f\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002 1. \u4ec0\u4e48\u662f\u5206\u5e03\u5f0f\u9501 \u5f53\u6211\u4eec\u5728\u7f16\u5199\u591a\u7ebf\u7a0b\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u4e0d\u540c\u7684\u7ebf\u7a0b\u53ef\u80fd\u4f1a\u53d1\u751f\u8d44\u6e90\u7684\u4e89\u593a\uff0c\u4e3a\u4e86\u907f\u514d\u8d44\u6e90\u4e89\u593a\u9020\u6210\u7684\u9519\u8bef\uff0c\u6211\u4eec\u4f1a\u5bf9\u8d44\u6e90\u4e0a\u9501\uff0c\u53ea\u6709\u83b7\u5f97\u9501\u7684\u7ebf\u7a0b\u624d\u80fd\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u3002 \u8fdb\u7a0b\u4e2d\u7684\u9501\uff0c\u672c\u8d28\u5c31\u662f\u5185\u5b58\u4e2d\u4e00\u4e2a\u53d8\u91cf\uff0c\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u67d0\u4e2a\u64cd\u4f5c\u7533\u8bf7\u52a0\u9501\u65f6\uff0c\u5982\u679c\u80fd\u6210\u529f\u628a\u4ee3\u8868\u9501\u7684\u53d8\u91cf\u503c\u8bbe\u7f6e\u4e3a1\uff0c\u5219\u8868\u793a\u83b7\u5f97\u4e86\u9501\uff0c\u5176\u4ed6\u7ebf\u7a0b\u60f3\u8981\u83b7\u5f97\u9501\u65f6\u4f1a\u963b\u585e\uff0c\u800c\u62e5\u6709\u9501\u7684\u7ebf\u7a0b\u6267\u884c\u5b8c\u64cd\u4f5c\u540e\uff0c\u518d\u628a\u9501\u7684\u503c\u8bbe\u7f6e\u4e3a0\uff0c\u5219\u8868\u793a\u91ca\u653e\u4e86\u9501\u3002 \u4e0a\u9762\u6211\u4eec\u8bf4\u7684\u662f\u5728\u4e00\u53f0\u670d\u52a1\u5668\u7684\u8fdb\u7a0b\u5185\u4e0d\u540c\u7ebf\u7a0b\u4e4b\u95f4\u7684\u9501\uff0c\u8fd9\u4e2a\u9501\u662f\u653e\u5728\u5185\u5b58\u4e2d\u7684\uff0c\u800c\u5bf9\u4e8e\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u4e0d\u540c\u7684\u5e94\u7528(\u8fdb\u7a0b\u6216\u7ebf\u7a0b)\u90e8\u7f72\u5728\u4e0d\u540c\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u8fd9\u6837\u5c31\u4e0d\u80fd\u901a\u8fc7\u5185\u5b58\u4e2d\u7684\u53d8\u91cf\u6765\u8868\u793a\u9501\u3002 \u5373\u7136\u5728\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u53ef\u4ee5\u901a\u8fc7\u5185\u5b58\u8fd9\u5757\u5171\u4eab\u7684\u7a7a\u95f4\u6765\u8868\u793a\u9501\uff0c\u90a3\u4e48\u5bf9\u4e8e\u5206\u5e03\u5f0f\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u53ef\u4ee5\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\u6765\u5b58\u50a8\u4e00\u4e2a\u5171\u4eab\u9501\uff0c\u8fd9\u5c31\u662f\u5206\u5e03\u5f0f\u9501\uff0c\u800cRedis\u4f5c\u4e3a\u5185\u5b58\u6570\u636e\u5e93\uff0c\u6267\u884c\u975e\u5e38\u5feb\uff0c\u5f88\u9002\u5408\u4f5c\u4e3a\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u5171\u4eab\u5b58\u50a8\u7cfb\u7edf\u3002 2. \u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501 \u5bf9\u4e8e\u4e00\u4e2a\u9501\u6765\u8bf4\uff0c\u5176\u5b9e\u53ea\u6709\u4e24\u4e2a\u64cd\u4f5c\uff0c\u52a0\u9501\u548c\u91ca\u653e\u9501\uff0c\u4e0b\u9762\u6211\u4eec\u770b\u6765\u770b\u901a\u8fc7Redis\u8981\u600e\u4e48\u5b9e\u73b0\uff1f 2.1 \u52a0\u9501 Redis\u7684setnx\u547d\u4ee4\u4f1a\u5224\u65ad\u952e\u503c\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u5b58\u5728\u5219\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c\uff0c\u5e76\u8fd4\u56de0\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u521b\u5efa\u5e76\u8d4b\u503c\uff0c\u5e76\u8fd4\u56de1\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u6267\u884csetnx\u4e3a\u4e00\u4e2a\u4ee3\u8868\u9501\u952e\u8bbe\u7f6e\u503c\uff0c\u5982\u679c\u80fd\u8bbe\u7f6e\u6210\u529f\uff0c\u5219\u8868\u793a\u83b7\u5f97\u9501\uff0c\u5931\u8d25\u5219\u65e0\u6cd5\u83b7\u5f97\u9501\u3002 # \u4f7f\u7528key\u4e3alock\u6765\u8868\u793a\u4e00\u4e2a\u9501 setnx lock 1 2.2 \u91ca\u653e\u9501 \u5f53\u6267\u884c\u597d\u64cd\u4f5c\u4e4b\u540e\uff0c\u8981\u91ca\u653e\u9501\u7684\u65f6\u5019\u76f4\u63a5\u628aRedis\u91cc\u7684\u952e\u503clock\u5220\u9664\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u6837\u5176\u4ed6\u8fdb\u7a0b\u624d\u80fd\u901a\u8fc7setnx\u547d\u4ee4\u91cd\u65b0\u8bbe\u7f6e\u5e76\u83b7\u5f97\u8be5\u9501\u3002 # \u91ca\u653e\u9501 del lock \u901a\u8fc7\u4e0a\u9762\u4e24\u4e2a\u547d\u4ee4\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5206\u5e03\u5f0f\u9501\uff0c\u4f46\u8fd9\u91cc\u5c31\u51fa\u73b0\u4e86\u4e00\u4e2a\u95ee\u9898\uff1a\u5982\u679c\u4e00\u4e2a\u8fdb\u7a0b\u901a\u8fc7setnx\u547d\u4ee4\u52a0\u9501\u4e4b\u540e\uff0c\u5728\u6267\u884c\u5177\u4f53\u64cd\u4f5c\u51fa\u9519\u4e86\uff0c\u6ca1\u6709\u529e\u6cd5\u53ca\u65f6\u91ca\u653e\u9501\uff0c\u90a3\u4e48\u5176\u4ed6\u8fdb\u7a0b\u5c31\u65e0\u6cd5\u83b7\u5f97\u8be5\u9501\uff0c\u7cfb\u7edf\u4fbf\u65e0\u6cd5\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\uff0c\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u7684\u529e\u6cd5\u5c31\u662f\u4e3a\u9501\u8bbe\u7f6e\u4e00\u4e2a\u6709\u6548\u671f\uff0c\u5728\u8fd9\u4e2a\u6709\u6548\u671f\u4e4b\u540e\uff0c\u81ea\u52a8\u91ca\u653e\u9501\u3002 2.3 \u7ed9\u9501\u8bbe\u7f6e\u6709\u6548\u671f \u7ed9\u9501\u8bbe\u7f6e\u6709\u6548\u671f\u975e\u5e38\u7b80\u5355\uff0c\u76f4\u63a5\u4f7f\u7528Redis\u7684expire\u547d\u4ee4\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\uff1a # \u52a0\u9501 setnx lock 1 # \u7ed9\u9501\u8bbe\u7f6e10s\u6709\u6548\u671f expire lock 10 \u4f46\u662f\uff0c\u73b0\u5728\u53c8\u51fa\u73b0\u53e6\u4e00\u4e2a\u95ee\u9898\u4e86\uff0c\u5982\u679c\u6211\u4eec\u5728\u8bbe\u7f6e\u4e86\u9501\u4e4b\u540e\uff0c\u6267\u884cexpire\u547d\u4ee4\u4e4b\u524d\u8be5\u8fdb\u7a0b\u6302\u6389\u4e86\uff0c\u90a3\u4e48expire\u5c31\u6ca1\u6709\u6267\u884c\u6210\u529f\uff0c\u9501\u4e00\u6837\u662f\u6ca1\u6709\u88ab\u91ca\u653e\u6389\u7684\uff0c\u6240\u4ee5\u4e00\u5b9a\u8981\u4fdd\u8bc1\u4e0a\u9762\u4e24\u4e2a\u547d\u4ee4\u8981\u4e00\u8d77\u6267\u884c\uff0c\u600e\u4e48\u4fdd\u8bc1\u5462\uff1f \u6709\u4e24\u4e2a\u65b9\u6cd5\uff0c\u4e00\u4e2a\u662f\u4f7f\u7528LUA\u8bed\u8a00\u7f16\u5199\u7684\u811a\u672c\uff0c\u53e6\u4e00\u4e2a\u662f\u4f7f\u7528Redis\u7684set\u547d\u4ee4\uff0cset\u547d\u4ee4\u540e\u9762\u8ddfnx\u53c2\u6570\u540e\uff0c\u6267\u884c\u7684\u6548\u679c\u4e0esetnx\u4e00\u81f4\uff0c\u4e14set\u547d\u4ee4\u53ef\u4ee5\u8ddfex\u53c2\u6570\u6765\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528set\u547d\u4ee4\u628asetnx\u548cexpire\u4e24\u4e2a\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u6267\u884c\u7684\u539f\u5b50\u6027\u4e86\u3002 # 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