{"id":46099,"date":"2024-12-01T17:09:11","date_gmt":"2024-12-01T09:09:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46099\/"},"modified":"2024-12-01T17:09:11","modified_gmt":"2024-12-01T09:09:11","slug":"redis%e7%9a%84%e8%bf%87%e6%9c%9f%e7%ad%96%e7%95%a5%e5%92%8c%e5%86%85%e5%ad%98%e6%b7%98%e6%b1%b0%e7%ad%96%e7%95%a5%e6%80%8e%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46099\/","title":{"rendered":"Redis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528"},"content":{"rendered":"

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

Redis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528<\/h1>\n

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

golang\u5b66\u4e60\u7f51\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u300aRedis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60\u6570\u636e\u5e93<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01<\/p>\n

1 \u8bbe\u7f6e\u5e26\u8fc7\u671f\u65f6\u95f4\u7684 key<\/h3>\n
expire key seconds\n\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO\uff081\uff09<\/pre>\n
\u8bbe\u7f6ekey<\/code>\u7684\u8fc7\u671f\u65f6\u95f4\u3002\u8d85\u65f6\u540e\uff0c\u5c06\u4f1a\u81ea\u52a8\u5220\u9664\u8be5key<\/code>\u3002\u5728Redis\u7684\u672f\u8bed\u4e2d\u4e00\u4e2akey<\/code>\u7684\u76f8\u5173\u8d85\u65f6\u662fvolatile\u7684\u3002<\/p>\n
\u8d85\u65f6\u540e\u53ea\u6709\u5bf9key<\/code>\u6267\u884cDEL\u3001SET\u3001GETSET\u65f6\u624d\u4f1a\u6e05\u9664\u3002 \u8fd9\u610f\u5473\u7740\uff0c\u4ece\u6982\u5ff5\u4e0a\u8bb2\u6240\u6709\u6539\u53d8key<\/code>\u800c\u4e0d\u7528\u65b0\u503c\u66ff\u6362\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u5c06\u4fdd\u6301\u8d85\u65f6\u4e0d\u53d8\u3002 \u4f8b\u5982\uff0c\u4f7f\u7528 INCR<\/code> \u9012\u589ekey\u7684\u503c\uff0c\u6267\u884c LPUSH<\/code> \u5c06\u65b0\u503c\u63a8\u5230 list \u4e2d\u6216\u7528 HSET<\/code> \u6539\u53d8hash\u7684field<\/code>\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u90fd\u4f7f\u8d85\u65f6\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n
    \n
  • \n
    \u4f7f\u7528 PERSIST<\/code> \u547d\u4ee4\u53ef\u4ee5\u6e05\u9664\u8d85\u65f6\uff0c\u4f7f\u5176\u53d8\u6210\u4e00\u4e2a\u6c38\u4e45key<\/code><\/p>\n<\/li>\n
  • \n
    \u82e5 key<\/code> \u88ab RENAME<\/code> \u547d\u4ee4\u4fee\u6539\uff0c\u76f8\u5173\u7684\u8d85\u65f6\u65f6\u95f4\u4f1a\u8f6c\u79fb\u5230\u65b0key<\/code><\/p>\n<\/li>\n
  • \n
    \u82e5 key<\/code> \u88ab RENAME<\/code> \u547d\u4ee4\u4fee\u6539\uff0c\u6bd4\u5982\u539f\u6765\u5c31\u5b58\u5728 Key_A<\/code>\uff0c\u7136\u540e\u8c03\u7528 RENAME Key_B Key_A<\/code> \u547d\u4ee4\uff0c\u8fd9\u65f6\u4e0d\u7ba1\u539f\u6765 Key_A<\/code> \u662f\u6c38\u4e45\u7684\u8fd8\u662f\u8bbe\u4e3a\u8d85\u65f6\u7684\uff0c\u90fd\u4f1a\u7531Key_B<\/code>\u7684\u6709\u6548\u671f\u72b6\u6001\u8986\u76d6<\/p>\n<\/li>\n<\/ul>\n
    \u6ce8\u610f\uff0c\u4f7f\u7528\u975e\u6b63\u8d85\u65f6\u8c03\u7528 EXPIRE\/PEXPIRE \u6216\u5177\u6709\u8fc7\u53bb\u65f6\u95f4\u7684 EXPIREAT\/PEXPIREAT \u5c06\u5bfc\u81f4key\u88ab\u5220\u9664\u800c\u4e0d\u662f\u8fc7\u671f\uff08\u56e0\u6b64\uff0c\u53d1\u51fa\u7684key\u4e8b\u4ef6\u5c06\u662f del\uff0c\u800c\u4e0d\u662f\u8fc7\u671f\uff09\u3002<\/p>\n
    1.1 \u5237\u65b0\u8fc7\u671f\u65f6\u95f4<\/h3>\n
    \u5bf9\u5df2\u7ecf\u6709\u8fc7\u671f\u65f6\u95f4\u7684key<\/code>\u6267\u884cEXPIRE<\/code>\u64cd\u4f5c\uff0c\u5c06\u4f1a\u66f4\u65b0\u5b83\u7684\u8fc7\u671f\u65f6\u95f4\u3002\u6709\u5f88\u591a\u5e94\u7528\u6709\u8fd9\u79cd\u4e1a\u52a1\u573a\u666f\uff0c\u4f8b\u5982\u8bb0\u5f55\u4f1a\u8bdd\u7684session\u3002<\/p>\n
    1.2 Redis \u4e4b\u524d\u7684 2.1.3 \u7684\u5dee\u5f02<\/h3>\n
    \u5728 Redis \u7248\u672c\u4e4b\u524d 2.1.3 \u4e2d\uff0c\u4f7f\u7528\u66f4\u6539\u5176\u503c\u7684\u547d\u4ee4\u66f4\u6539\u5177\u6709\u8fc7\u671f\u96c6\u7684\u5bc6\u94a5\u5177\u6709\u5b8c\u5168\u5220\u9664key\u7684\u6548\u679c\u3002\u7531\u4e8e\u73b0\u5728\u4fee\u590d\u7684\u590d\u5236\u5c42\u4e2d\u5b58\u5728\u9650\u5236\uff0c\u56e0\u6b64\u9700\u8981\u6b64\u8bed\u4e49\u3002<\/p>\n
    EXPIRE \u5c06\u8fd4\u56de 0\uff0c\u5e76\u4e14\u4e0d\u4f1a\u66f4\u6539\u5177\u6709\u8d85\u65f6\u96c6\u7684\u952e\u7684\u8d85\u65f6\u3002<\/p>\n
    1.3 \u8fd4\u56de\u503c<\/h3>\n
      \n
    • \n
      1<\/code> \u5982\u679c\u6210\u529f\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n<\/li>\n
    • \n
      0<\/code> \u5982\u679ckey<\/code>\u4e0d\u5b58\u5728\u6216\u8005\u4e0d\u80fd\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n<\/li>\n<\/ul>\n
      1.4 \u793a\u4f8b<\/h3>\n
      \"Redis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528\u63d2\u56fe\"<\/p>\n
      \u5047\u8bbe\u6709\u4e00 Web \u670d\u52a1\uff0c\u5bf9\u7528\u6237\u6700\u8fd1\u8bbf\u95ee\u7684\u6700\u65b0 N \u9875\u611f\u5174\u8da3\uff0c\u8fd9\u6837\u6bcf\u4e2a\u76f8\u90bb\u9875\u9762\u89c6\u56fe\u5728\u4e0a\u4e00\u4e2a\u9875\u9762\u4e4b\u540e\u4e0d\u8d85\u8fc7 60 \u79d2\u3002\u4ece\u6982\u5ff5\u4e0a\u8bb2\uff0c\u53ef\u4ee5\u5c06\u8fd9\u7ec4\u9875\u9762\u89c6\u56fe\u89c6\u4e3a\u7528\u6237\u7684\u5bfc\u822a\u4f1a\u8bdd\uff0c\u8be5\u4f1a\u8bdd\u53ef\u80fd\u5305\u542b\u6709\u5173ta\u5f53\u524d\u6b63\u5728\u5bfb\u627e\u7684\u4ea7\u54c1\u7684\u6709\u8da3\u4fe1\u606f\uff0c\u4ee5\u4fbf\u4f60\u53ef\u4ee5\u63a8\u8350\u76f8\u5173\u4ea7\u54c1\u3002<\/p>\n
      \u53ef\u4f7f\u7528\u4ee5\u4e0b\u7b56\u7565\u8f7b\u677e\u5728 Redis \u4e2d\u5bf9\u6b64\u6a21\u5f0f\u5efa\u6a21\uff1a\u6bcf\u6b21\u7528\u6237\u6267\u884c\u9875\u9762\u89c6\u56fe\u65f6\uff0c\u60a8\u90fd\u4f1a\u8c03\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
      MULTI\nRPUSH pagewviews.user:<userid> http:\/\/.....\nEXPIRE pagewviews.user:<userid> 60\nEXEC<\/pre>\n
      \u5982\u679c\u7528\u6237\u7a7a\u95f2\u8d85\u8fc7 60 \u79d2\uff0c\u5219\u5c06\u5220\u9664\u8be5key\uff0c\u5e76\u4e14\u4ec5\u8bb0\u5f55\u5dee\u5f02\u5c0f\u4e8e 60 \u79d2\u7684\u540e\u7eed\u9875\u9762\u89c6\u56fe\u3002 \u6b64\u6a21\u5f0f\u5f88\u5bb9\u6613\u4fee\u6539\uff0c\u4f7f\u7528 INCR \u800c\u4e0d\u662f\u4f7f\u7528 RPUSH \u7684\u5217\u8868\u3002<\/p>\n
      1.5 \u5e26\u8fc7\u671f\u65f6\u95f4\u7684 key<\/h3>\n
      \u901a\u5e38\uff0c\u521b\u5efa Redis \u952e\u65f6\u6ca1\u6709\u5173\u8054\u7684\u5b58\u6d3b\u65f6\u95f4\u3002key\u5c06\u6c38\u5b58\uff0c\u9664\u975e\u7528\u6237\u4ee5\u663e\u5f0f\u65b9\u5f0f\uff08\u4f8b\u5982 DEL \u547d\u4ee4\uff09\u5c06\u5176\u5220\u9664\u3002 EXPIRE \u65cf\u7684\u547d\u4ee4\u80fd\u591f\u5c06\u8fc7\u671f\u9879\u4e0e\u7ed9\u5b9akey\u5173\u8054\uff0c\u4f46\u4ee3\u4ef7\u662f\u8be5key\u4f7f\u7528\u7684\u989d\u5916\u5185\u5b58\u3002\u5f53key\u5177\u6709\u8fc7\u671f\u96c6\u65f6\uff0cRedis \u5c06\u786e\u4fdd\u5728\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u65f6\u5220\u9664\u8be5key\u3002 \u53ef\u4f7f\u7528 EXPIRE \u548c PERSIST \u547d\u4ee4\uff08\u6216\u5176\u4ed6\u4e25\u683c\u547d\u4ee4\uff09\u66f4\u65b0\u6216\u5b8c\u5168\u5220\u9664\u751f\u5b58\u7684\u5173\u952e\u65f6\u95f4\u3002<\/p>\n
      1.6 \u8fc7\u671f\u7cbe\u5ea6<\/h3>\n
      \u5728 Redis 2.4 \u4e2d\uff0c\u8fc7\u671f\u53ef\u80fd\u4e0d\u51c6\u786e\uff0c\u5e76\u4e14\u53ef\u80fd\u4ecb\u4e8e 0 \u5230 1 \u79d2\u4e4b\u95f4\u3002 \u7531\u4e8e Redis 2.6\uff0c\u8fc7\u671f\u8bef\u5dee\u4ece 0 \u5230 1 \u6beb\u79d2\u3002<\/p>\n
      1.7 \u8fc7\u671f\u548c\u6301\u4e45\u5316<\/h3>\n
      \u8fc7\u671f\u4fe1\u606f\u7684\u952e\u5b58\u50a8\u4e3a\u7edd\u5bf9 Unix \u65f6\u95f4\u6233\uff08Redis \u7248\u672c 2.6 \u6216\u66f4\u9ad8\u7248\u672c\u4e3a\u6beb\u79d2\uff09\u3002\u8fd9\u610f\u5473\u7740\u5373\u4f7f Redis \u5b9e\u4f8b\u4e0d\u5904\u4e8e\u6d3b\u52a8\u72b6\u6001\uff0c\u65f6\u95f4\u4e5f\u5728\u6d41\u52a8\u3002 \u8981\u4f7f\u8fc7\u671f\u5de5\u4f5c\u826f\u597d\uff0c\u5fc5\u987b\u7a33\u5b9a\u8ba1\u7b97\u673a\u65f6\u95f4\u3002\u82e5\u5c06 RDB \u6587\u4ef6\u4ece\u4e24\u53f0\u8ba1\u7b97\u673a\u4e0a\u79fb\u52a8\uff0c\u5176\u65f6\u949f\u4e2d\u5177\u6709\u5927 desync\uff0c\u5219\u53ef\u80fd\u4f1a\u53d1\u751f\u6709\u8da3\u7684\u4e8b\u60c5\uff08\u5982\u52a0\u8f7d\u65f6\u52a0\u8f7d\u5230\u8fc7\u671f\u7684\u6240\u6709key\uff09\u3002 \u5373\u4f7f\u8fd0\u884c\u65f6\u7684\u5b9e\u4f8b\uff0c\u4e5f\u59cb\u7ec8\u4f1a\u68c0\u67e5\u8ba1\u7b97\u673a\u65f6\u949f\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u5c06\u4e00\u4e2akey\u8bbe\u7f6e\u4e3a 1000 \u79d2\uff0c\u7136\u540e\u5728\u5c06\u6765\u8bbe\u7f6e\u8ba1\u7b97\u673a\u65f6\u95f4 2000 \u79d2\uff0c\u5219\u8be5key\u5c06\u7acb\u5373\u8fc7\u671f\uff0c\u800c\u4e0d\u662f\u6301\u7eed 1000 \u79d2\u3002<\/p>\n
      2 Redis \u5982\u4f55\u4f7fkey\u8fc7\u671f<\/h3>\n
      \u952e\u7684\u8fc7\u671f\u65b9\u5f0f\u6709\u4e24\u79cd\uff1a\u88ab\u52a8\u65b9\u5f0f – \u60f0\u6027\u5220\u9664\uff0c\u4e3b\u52a8\u65b9\u5f0f – \u5b9a\u671f\u5220\u9664\u3002<\/p>\n
      2.1 \u60f0\u6027\u5220\u9664<\/h3>\n
      \u5f53\u5ba2\u6237\u7aef\u5c1d\u8bd5\u8bbf\u95eekey\u65f6\uff0ckey\u4f1a\u88ab\u52a8\u8fc7\u671f\uff0c\u5373Redis\u4f1a\u68c0\u67e5\u8be5key\u662f\u5426\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\uff0c\u5982\u679c\u8fc7\u671f\u4e86\u5c31\u4f1a\u5220\u9664\uff0c\u4e5f\u4e0d\u4f1a\u8fd4\u56de\u4efb\u4f55\u4e1c\u897f\u3002 \u6ce8\u610f\u5e76\u975e\u662fkey\u5230\u671f\u4e86\u5c31\u4f1a\u88ab\u81ea\u52a8\u5220\u9664\uff0c\u800c\u662f\u5f53\u67e5\u8be2\u8be5key\u65f6\uff0cRedis\u518d\u5f88\u61d2\u60f0\u5730\u68c0\u67e5\u662f\u5426\u5220\u9664\u3002\u8fd9\u548c spring \u7684\u5ef6\u8fdf\u521d\u59cb\u5316\u6709\u7740\u5f02\u66f2\u540c\u5de5\u4e4b\u5999\u3002<\/p>\n
      \u5f53\u7136\uff0c\u8fd9\u662f\u4e0d\u591f\u7684\uff0c\u56e0\u4e3a\u6709\u8fc7\u671f\u7684key\uff0c\u6c38\u8fdc\u4e0d\u4f1a\u518d\u8bbf\u95ee\u3002\u65e0\u8bba\u5982\u4f55\uff0c\u8fd9\u4e9bkey\u90fd\u5e94\u8fc7\u671f\uff0c\u56e0\u6b64\u8bf7\u5b9a\u671f Redis \u5728\u5177\u6709\u8fc7\u671f\u96c6\u7684key\u4e4b\u95f4\u968f\u673a\u6d4b\u8bd5\u51e0\u4e2akey\u3002\u5df2\u8fc7\u671f\u7684\u6240\u6709key\u5c06\u4ecekey\u7a7a\u95f4\u4e2d\u5220\u9664\u3002<\/p>\n
      2.2 \u5b9a\u671f\u5220\u9664<\/h3>\n
      \u5177\u4f53\u6765\u8bf4\uff0c\u5982\u4e0b Redis \u6bcf\u79d2 10 \u6b21\uff1a<\/p>\n
        \n
      1. \n
        \u6d4b\u8bd5 20 \u4e2a\u5e26\u6709\u8fc7\u671f\u7684\u968f\u673a\u952e<\/p>\n<\/li>\n
      2. \n
        \u5220\u9664\u627e\u5230\u7684\u6240\u6709\u5df2\u8fc7\u671fkey<\/p>\n<\/li>\n
      3. \n
        \u5982\u679c\u8d85\u8fc7 25% \u7684key\u5df2\u8fc7\u671f\uff0c\u4ece\u6b65\u9aa4 1 \u91cd\u65b0\u5f00\u59cb<\/p>\n<\/li>\n<\/ol>\n
        \u8fd9\u662f\u4e00\u4e2a\u5fae\u4e0d\u8db3\u9053\u7684\u6982\u7387\u7b97\u6cd5\uff0c\u57fa\u672c\u4e0a\u5047\u8bbe\u6211\u4eec\u7684\u6837\u672c\u4ee3\u8868\u6574\u4e2akey\u7a7a\u95f4\uff0c\u7ee7\u7eed\u8fc7\u671f\uff0c\u76f4\u5230\u53ef\u80fd\u8fc7\u671f\u7684key\u767e\u5206\u6bd4\u4f4e\u4e8e 25%\u3002 \u8fd9\u610f\u5473\u7740\u5728\u4efb\u4f55\u7ed9\u5b9a\u65f6\u523b\uff0c\u4f7f\u7528\u5185\u5b58\u7684\u5df2\u8fc7\u671f\u7684\u6700\u5927\u952e\u91cf\u7b49\u4e8e\u6700\u5927\u5199\u5165\u64cd\u4f5c\u91cf\/\u79d2\u9664\u4ee5 4\u3002<\/p>\n
        2.3 \u5728\u590d\u5236\u94fe\u8def\u548c AOF \u6587\u4ef6\u4e2d\u5904\u7406\u8fc7\u671f\u7684\u65b9\u5f0f<\/h3>\n
        \u4e3a\u4e86\u5728\u4e0d\u727a\u7272\u4e00\u81f4\u6027\u7684\u60c5\u51b5\u4e0b\u83b7\u5f97\u6b63\u786e\u884c\u4e3a\uff0c\u5f53key\u8fc7\u671f\u65f6\uff0cDEL \u64cd\u4f5c\u5c06\u540c\u65f6\u5728 AOF \u6587\u4ef6\u4e2d\u5408\u6210\u5e76\u83b7\u53d6\u6240\u6709\u9644\u52a0\u7684\u4ece\u8282\u70b9\u3002\u8fd9\u6837\uff0c\u8fc7\u671f\u7684\u8fd9\u4e2a\u5904\u7406\u8fc7\u7a0b\u96c6\u4e2d\u5230\u4e3b\u8282\u70b9\u4e2d\uff0c\u8fd8\u6ca1\u6709\u4e00\u81f4\u6027\u9519\u8bef\u7684\u53ef\u80fd\u6027\u3002<\/p>\n
        \u4f46\u662f\uff0c\u867d\u7136\u8fde\u63a5\u5230\u4e3b\u8282\u70b9\u7684\u4ece\u8282\u70b9\u4e0d\u4f1a\u72ec\u7acb\u8fc7\u671fkey\uff08\u4f46\u4f1a\u7b49\u5f85\u6765\u81eamaster\u7684 DEL\uff09\uff0c\u4f46\u5b83\u4eec\u4ecd\u5c06\u4f7f\u7528\u6570\u636e\u96c6\u4e2d\u73b0\u6709\u8fc7\u671f\u7684\u5b8c\u6574\u72b6\u6001\uff0c\u56e0\u6b64\uff0c\u5f53\u9009\u62e9slave\u4f5c\u4e3amaster\u65f6\uff0c\u5b83\u5c06\u80fd\u591f\u72ec\u7acb\u8fc7\u671fkey\uff0c\u5b8c\u5168\u5145\u5f53master\u3002<\/p>\n
        \u53ef\u662f\uff0c\u5f88\u591a\u8fc7\u671fkey\uff0c\u4f60\u6ca1\u53ca\u65f6\u53bb\u67e5\uff0c\u5b9a\u671f\u5220\u9664\u4e5f\u6f0f\u6389\u4e86\uff0c\u5927\u91cf\u8fc7\u671fkey\u5806\u79ef\u5185\u5b58\uff0cRedis\u5185\u5b58\u6b86\u8017\u5c3d\uff01<\/p>\n
        \u56e0\u6b64\u8fd8\u9700\u6709\u5185\u5b58\u6dd8\u6c70\u673a\u5236\uff01<\/p>\n
        3 \u5185\u5b58\u6dd8\u6c70<\/h3>\n
        3.1 \u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/h3>\n
        \"Redis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528\u63d2\u56fe1\"<\/p>\n
        noeviction\uff08Redis\u9ed8\u8ba4\u7b56\u7565\uff09<\/h4>\n
        \u4e0d\u4f1a\u7ee7\u7eed\u670d\u52a1\u5199\u8bf7\u6c42 (DEL \u8bf7\u6c42\u53ef\u4ee5\u7ee7\u7eed\u670d\u52a1)\uff0c\u8bfb\u8bf7\u6c42\u53ef\u4ee5\u7ee7\u7eed\u8fdb\u884c\u3002\u8fd9\u6837 \u53ef\u4ee5\u4fdd\u8bc1\u4e0d\u4f1a\u4e22\u5931\u6570\u636e\uff0c\u4f46\u662f\u4f1a\u8ba9\u7ebf\u4e0a\u7684\u4e1a\u52a1\u4e0d\u80fd\u6301\u7eed\u8fdb\u884c\u3002<\/p>\n
          \n
        • \n
          config.c<\/p>\n<\/li>\n<\/ul>\n
          createEnumConfig(\"maxmemory-policy\", NULL, \n\tMODIFIABLE_CONFIG, maxmemory_policy_enum, \n\t\tserver.maxmemory_policy, \n\t\t\tMAXMEMORY_NO_EVICTION, NULL, NULL),<\/pre>\n
          allkeys-random<\/h4>\n
          \u5f53\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u5199\u5165\u6570\u636e\u65f6\uff0c\u5728\u952e\u7a7a\u95f4\u4e2d\uff0c\u968f\u673a\u79fb\u9664\u67d0key\u3002\u51ed\u5565\u968f\u673a\u5462\uff0c\u81f3\u5c11\u4e5f\u662f\u628a\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684key\u5220\u9664\u3002<\/p>\n
          allkeys-lru(Least Recently Used)<\/h4>\n
          \u5f53\u5185\u5b58\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u65b0\u5199\u5165\u6570\u636e\u65f6\uff0c\u5728\u952e\u7a7a\u95f4\u4e2d\uff0c\u79fb\u9664\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\u7684key\uff0c\u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684 key \u4e5f\u4f1a\u88ab\u6dd8\u6c70\u3002<\/p>\n
          allkeys-lfu(Least Frequently Used)<\/h4>\n
          LRU\u7684\u5173\u952e\u662f\u770b\u9875\u9762\u6700\u540e\u4e00\u6b21\u88ab\u4f7f\u7528\u5230\u53d1\u751f\u8c03\u5ea6\u7684\u65f6\u95f4\u957f\u77ed<\/strong>\uff0c\u800cLFU\u5173\u952e\u662f\u770b\u4e00\u5b9a\u65f6\u95f4\u6bb5\u5185\u9875\u9762\u88ab\u4f7f\u7528\u7684\u9891\u7387<\/strong>\u3002<\/p>\n
          volatile-lru<\/h4>\n
          \u5c1d\u8bd5\u6dd8\u6c70\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684 key\uff0c\u6700\u5c11\u4f7f\u7528\u7684 key \u4f18\u5148\u88ab\u6dd8\u6c70\u3002 \u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684 key \u4e0d\u4f1a\u88ab\u6dd8\u6c70\uff0c\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u9700\u8981\u6301\u4e45\u5316\u7684\u6570\u636e\u4e0d\u4f1a\u7a81\u7136\u4e22\u5931\u3002 \u533a\u522b\u4e8e allkey-lru\uff0c\u8fd9\u4e2a\u7b56\u7565\u8981\u6dd8\u6c70\u53ea\u662f\u8fc7\u671f\u7684 key \u96c6\u5408\u3002<\/p>\n
          volatile-lfu<\/h4>\n
          volatile-random<\/h4>\n
          \u6dd8\u6c70\u7684 key \u662f\u8fc7\u671f key \u96c6\u5408\u4e2d\u968f\u673a\u7684 key\u3002<\/p>\n
          volatile-ttl<\/h4>\n
          \u6dd8\u6c70\u7684\u7b56\u7565\u4e0d\u662f LRU\uff0c\u800c\u662f key \u7684\u5269\u4f59\u5bff\u547d ttl \u7684\u503c\uff0cttl \u8d8a\u5c0f\u8d8a\u4f18\u5148\u88ab\u6dd8\u6c70\u3002<\/p>\n
          volatile-xxx \u7b56\u7565\u53ea\u4f1a\u9488\u5bf9\u5e26\u8fc7\u671f\u65f6\u95f4\u7684 key \u8fdb\u884c\u6dd8\u6c70\uff0callkeys-xxx \u7b56\u7565\u4f1a\u5bf9\u6240\u6709\u7684 key \u8fdb\u884c\u6dd8\u6c70\u3002<\/p>\n
            \n
          • \n
            \u5982\u679c\u4f60\u53ea\u662f\u62ff Redis \u505a\u7f13\u5b58\uff0c\u90a3\u5e94\u8be5\u4f7f\u7528 allkeys-xxx\uff0c\u5ba2\u6237\u7aef\u5199\u7f13\u5b58\u65f6\u4e0d\u5fc5\u643a\u5e26\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n<\/li>\n
          • \n
            \u5982\u679c\u4f60\u8fd8\u60f3\u540c\u65f6\u4f7f\u7528 Redis \u7684\u6301\u4e45\u5316\u529f\u80fd\uff0c\u90a3\u5c31\u4f7f\u7528 volatile-xxx \u7b56\u7565\uff0c\u8fd9\u6837\u53ef\u4ee5\u4fdd\u7559\u6ca1\u6709\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u7684 key\uff0c\u5b83\u4eec\u662f\u6c38\u4e45\u7684 key \u4e0d\u4f1a\u88ab LRU \u7b97\u6cd5\u6dd8\u6c70\u3002<\/p>\n<\/li>\n<\/ul>\n
            3.2 \u624b\u5199LRU<\/h3>\n
            \u786e\u5b9e\u6709\u65f6\u4f1a\u95ee\u8fd9\u4e2a\uff0c\u56e0\u4e3a\u6709\u4e9b\u5019\u9009\u4eba\u5982\u679c\u786e\u5b9e\u8fc7\u4e94\u5173\u65a9\u516d\u5c06\uff0c\u524d\u9762\u7684\u95ee\u9898\u90fd\u7b54\u7684\u5f88\u597d\uff0c\u90a3\u4e48\u5176\u5b9e\u8ba9\u4ed6\u5199\u4e00\u4e0bLRU\u7b97\u6cd5\uff0c\u53ef\u4ee5\u8003\u5bdf\u4e00\u4e0b\u7f16\u7801\u529f\u5e95<\/p>\n
            \u4f60\u53ef\u4ee5\u73b0\u573a\u624b\u5199\u6700\u539f\u59cb\u7684LRU\u7b97\u6cd5\uff0c\u90a3\u4e2a\u4ee3\u7801\u91cf\u592a\u5927\u4e86\uff0c\u4e0d\u592a\u73b0\u5b9e<\/p>\n
            public class LRUCache<K, V> extends LinkedHashMap<K, V> {\n    \nprivate final int CACHE_SIZE;\n\n    \/\/ \u8fd9\u91cc\u5c31\u662f\u4f20\u9012\u8fdb\u6765\u6700\u591a\u80fd\u7f13\u5b58\u591a\u5c11\u6570\u636e\n    public LRUCache(int cacheSize) {\n    \t\/\/  true\u6307linkedhashmap\u5c06\u5143\u7d20\u6309\u8bbf\u95ee\u987a\u5e8f\u6392\u5e8f\n        super((int) Math.ceil(cacheSize \/ 0.75) + 1, 0.75f, true);\n        CACHE_SIZE = cacheSize;\n    }\n\n    @Override\n    protected boolean removeEldestEntry(Map.Entry eldest) {\n    \t \/\/ \u5f53KV\u6570\u636e\u91cf\u5927\u4e8e\u6307\u5b9a\u7f13\u5b58\u4e2a\u6570\u65f6\uff0c\u5c31\u81ea\u52a8\u5220\u9664\u6700\u8001\u6570\u636e\n        return size() > CACHE_SIZE;\n    }\n\n}<\/pre>\n
            \u4ee5\u4e0a\u5c31\u662f\u300aRedis\u7684\u8fc7\u671f\u7b56\u7565\u548c\u5185\u5b58\u6dd8\u6c70\u7b56\u7565\u600e\u4e48\u7528\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8eredis\u7684\u8d44\u6599\u8bf7\u5173\u6ce8golang\u5b66\u4e60\u7f51\u516c\u4f17\u53f7\uff01<\/p>\n
              \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1a\u4ebf\u901f\u4e91 \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664  <\/p>\n
            \n
            \n <\/dt>\n
            \n   \u5c31\u201c\u9ad8\u901f\u8d39\u4e0d\u900f\u660e\u201d\u95ee\u9898\uff0c\u6d59\u6c5f\u7701\u6d88\u4fdd\u59d4\u7ea6\u8c08 10 \u5bb6\u7f51\u7ea6\u8f66\u5e73\u53f0\n <\/dd>\n<\/dl>\n
            \n
            \n <\/dt>\n
            \n   AI\u52a9\u529b\u8111\u673a\u63a5\u53e3\u7814\u7a76\uff0c\u7ebd\u7ea6\u5927\u5b66\u7a81\u7834\u6027\u795e\u7ecf\u8bed\u97f3\u89e3\u7801\u6280\u672f\uff0c\u767bNature\u5b50\u520a\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
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