{"id":202264,"date":"2025-05-10T08:30:02","date_gmt":"2025-05-10T00:30:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202264\/"},"modified":"2025-05-10T08:30:02","modified_gmt":"2025-05-10T00:30:02","slug":"redis%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e6%95%b0%e6%8d%ae%e8%bf%87%e6%9c%9f%e8%87%aa%e5%8a%a8%e6%b8%85%e7%90%86%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202264\/","title":{"rendered":"Redis\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\u529f\u80fd"},"content":{"rendered":"

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

Redis\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\u529f\u80fd<\/h1>\n

\u4eca\u5929golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u5e26\u6765\u4e86\u300aRedis\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\u529f\u80fd\u300b<\/span>\uff0c\u5176\u4e2d\u6d89\u53ca\u5230\u7684\u77e5\u8bc6\u70b9\u5305\u62ec<\/span>\u7b49\u7b49\uff0c\u65e0\u8bba\u4f60\u662f\u5c0f\u767d\u8fd8\u662f\u8001\u624b\uff0c\u90fd\u9002\u5408\u770b\u4e00\u770b\u54e6~\u6709\u597d\u7684\u5efa\u8bae\u4e5f\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u82e5\u662f\u770b\u5b8c\u6709\u6240\u6536\u83b7\uff0c\u4e5f\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u70b9\u8d5e\u652f\u6301\u5440\uff01\u4e00\u8d77\u52a0\u6cb9\u5b66\u4e60~<\/p>\n

Redis\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u5185\u5b58\u6570\u636e\u7ed3\u6784\u5b58\u50a8\u7cfb\u7edf\uff0c\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u548c\u8bfb\u53d6\u952e\u503c\u5bf9\uff0c\u652f\u6301\u591a\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u6bd4\u5982\u5b57\u7b26\u4e32\u3001\u5217\u8868\u3001\u54c8\u5e0c\u8868\u3001\u96c6\u5408\u7b49\u3002\u7531\u4e8eRedis\u662f\u4e00\u4e2a\u57fa\u4e8e\u5185\u5b58\u7684\u5b58\u50a8\u7cfb\u7edf\uff0c\u5982\u679c\u6ca1\u6709\u5bf9\u6570\u636e\u8fdb\u884c\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\uff0c\u5f88\u5bb9\u6613\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u3002\u56e0\u6b64\u672c\u6587\u5c06\u4ecb\u7ecdRedis\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\u529f\u80fd\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001Redis\u6570\u636e\u8fc7\u671f\u6982\u8ff0<\/p>\n

Redis\u652f\u6301\u8bbe\u7f6e\u6570\u636e\u7684\u8fc7\u671f\u65f6\u95f4\uff0c\u8fc7\u671f\u65f6\u95f4\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u56fa\u5b9a\u7684\u65f6\u95f4\uff0c\u6bd4\u59821\u5c0f\u65f6\u30011\u5929\u7b49\uff0c\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u65f6\u95f4\u6233\uff0c\u8868\u793a\u5728\u8be5\u65f6\u95f4\u70b9\u8fc7\u671f\u3002\u8fc7\u671f\u65f6\u95f4\u53ef\u4ee5\u901a\u8fc7EXPIRE<\/code>\u3001EXPIREAT<\/code>\u3001PEXPIRE<\/code>\u3001PEXPIREAT<\/code>\u7b49\u547d\u4ee4\u8fdb\u884c\u8bbe\u7f6e\uff0c\u5176\u4f5c\u7528\u6709\uff1a<\/p>\n

    \n
  1. \u81ea\u52a8\u6e05\u7406\u8fc7\u671f\u6570\u636e\u3002<\/li>\n
  2. \u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002<\/li>\n
  3. \u9632\u6b62\u6570\u636e\u88ab\u957f\u65f6\u95f4\u6ede\u7559\u3002<\/li>\n<\/ol>\n

    \u4e8c\u3001Redis\u6570\u636e\u8fc7\u671f\u5b9e\u73b0<\/p>\n

    Redis\u6570\u636e\u8fc7\u671f\u662f\u901a\u8fc7\u4e24\u4e2a\u5b9a\u65f6\u4efb\u52a1\u6765\u5b9e\u73b0\u7684\uff0c\u5b83\u4eec\u662f\uff1a<\/p>\n

      \n
    1. \u5b9a\u671f\u626b\u63cf\u8fc7\u671f\u952e\uff08expired keys\uff09\uff1a\u8be5\u4efb\u52a1\u7684\u4f5c\u7528\u662f\u68c0\u67e5\u8fc7\u671f\u952e\uff0c\u5e76\u5220\u9664\u5b83\u4eec\u3002\u8be5\u4efb\u52a1\u6bcf\u79d2\u68c0\u67e5\u4e00\u6b21\uff0c\u5e76\u5220\u9664\u6240\u6709\u8fc7\u671f\u952e\uff0c\u5982\u679c\u952e\u5df2\u7ecf\u8fc7\u671f\uff0c\u5219\u8be5\u952e\u5c06\u88ab\u5220\u9664\u3002<\/li>\n
    2. \u60f0\u6027(safe)\u5220\u9664\uff1a\u8be5\u4efb\u52a1\u7684\u4f5c\u7528\u662f\u5728\u4f7f\u7528\u952e\u65f6\u68c0\u67e5\u662f\u5426\u8fc7\u671f\uff0c\u5e76\u5220\u9664\u5b83\u4eec\u3002\u8be5\u4efb\u52a1\u4ec5\u5728\u8c03\u7528\u5df2\u8fc7\u671f\u952e\uff08expired key\uff09\u65f6\u8fd0\u884c\u3002\u4e00\u65e6\u8c03\u7528\u4e00\u4e2a\u8fc7\u671f\u952e\uff0c\u8be5\u952e\u5c31\u4f1a\u7acb\u5373\u5220\u9664\u3002<\/li>\n<\/ol>\n

      Redis\u6570\u636e\u8fc7\u671f\u7684\u5b9e\u73b0\u4f9d\u8d56\u4e8e\u4e0a\u9762\u4e24\u4e2a\u5b9a\u65f6\u4efb\u52a1\uff0c\u56e0\u6b64\uff0c\u8981\u542f\u7528\u6570\u636e\u8fc7\u671f\uff0c\u9700\u8981\u901a\u8fc7\u4ee5\u4e0b\u4e24\u4e2a\u53c2\u6570\u8fdb\u884c\u914d\u7f6e\uff1a<\/p>\n

      maxmemory-policy: volatile-lru\nmaxmemory-policy: allkeys-lru<\/pre>\n
      \u5176\u4e2d\uff0cvolative-lru\u8868\u793a\u53ea\u5bf9\u8bbe\u7f6e\u4e86\u8fc7\u671f\u65f6\u95f4\u7684\u952e\u8fdb\u884cLRU\uff08Least Recently Used\uff09\u6dd8\u6c70\u64cd\u4f5c\uff0callkeys-lru\u8868\u793a\u5bf9\u6240\u6709\u952e\u8fdb\u884cLRU\u6dd8\u6c70\u64cd\u4f5c\u3002\u8fd9\u4e24\u4e2a\u53c2\u6570\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\uff1a\u5f53\u5185\u5b58\u6ee1\u65f6\uff0cvolatile-lru\u53ea\u4f1a\u6dd8\u6c70\u8fc7\u671f\u952e\uff0c\u800callkeys-lru\u4f1a\u6dd8\u6c70\u6240\u6709\u952e\u3002<\/p>\n
      \u4e09\u3001Redis\u6570\u636e\u8fc7\u671f\u4ee3\u7801\u5b9e\u73b0<\/p>\n
      \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528Python Redis\u6a21\u5757\u7684\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05\u7406\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n
      import redis\nimport time\n\nredis_client = redis.Redis(host='localhost', port=6379, db=0)\n\n# \u8bbe\u7f6e\u952e\u503c\u5bf9\u548c\u8fc7\u671f\u65f6\u95f4\nredis_client.set('key1', 'value1', ex=5)\n\n# \u68c0\u67e5\u952e\u503c\u5bf9\u662f\u5426\u5b58\u5728\u4ee5\u53ca\u5269\u4f59\u8fc7\u671f\u65f6\u95f4\nif redis_client.exists('key1'):\n    ttl = redis_client.ttl('key1')\n    print('key1 exists with remaining ttl: ', ttl)\n\n# \u7b49\u5f855\u79d2\uff0c\u8fc7\u671f\u81ea\u52a8\u5220\u9664\ntime.sleep(5)\n\n# \u68c0\u67e5\u952e\u503c\u5bf9\u662f\u5426\u5b58\u5728\u4ee5\u53ca\u5269\u4f59\u8fc7\u671f\u65f6\u95f4\nif redis_client.exists('key1'):\n    ttl = redis_client.ttl('key1')\n    print('key1 exists with remaining ttl: ', ttl)\nelse:\n    print('key1 does not exist.')\n<\/pre>\n
      \u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528Redis\u6a21\u5757\u8bbe\u7f6e\u952e\u503c\u5bf9\u548c\u8fc7\u671f\u65f6\u95f4\u3002\u6211\u4eec\u4f7f\u7528exists<\/code>\u51fd\u6570\u68c0\u67e5\u952e\u662f\u5426\u5b58\u5728\uff0c\u5e76\u4f7f\u7528ttl<\/code>\u51fd\u6570\u83b7\u53d6\u8fc7\u671f\u65f6\u95f4\u3002\u6700\u540e\uff0c\u6211\u4eec\u7b49\u5f855\u79d2\u949f\uff0c\u518d\u6b21\u68c0\u67e5\u952e\u662f\u5426\u5b58\u5728\uff0c\u5e76\u8f93\u51fa\u76f8\u5e94\u7684\u7ed3\u679c\u3002<\/p>\n
      \u56db\u3001\u5c0f\u7ed3<\/p>\n
      Redis\u6570\u636e\u8fc7\u671f\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u5730\u51cf\u5c11\u5185\u5b58\u4f7f\u7528\u91cf\uff0c\u9632\u6b62\u6570\u636e\u957f\u65f6\u95f4\u6ede\u7559\u548c\u63d0\u9ad8\u5185\u5b58\u5229\u7528\u7387\u3002Redis\u63d0\u4f9b\u4e86\u4e24\u4e2a\u5b9a\u65f6\u4efb\u52a1\u6765\u6e05\u7406\u5df2\u8fc7\u671f\u7684\u952e\uff0c\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6emaxmemory-policy<\/code>\u53c2\u6570\u6765\u542f\u7528\u6570\u636e\u8fc7\u671f\u3002\u5728\u4ee3\u7801\u5b9e\u73b0\u65b9\u9762\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Python Redis\u6a21\u5757\u6765\u8bbe\u7f6e\u952e\u503c\u5bf9\u548c\u8fc7\u671f\u65f6\u95f4\uff0c\u5e76\u4f7f\u7528exists<\/code>\u548cttl<\/code>\u51fd\u6570\u6765\u68c0\u67e5\u952e\u662f\u5426\u5b58\u5728\u548c\u83b7\u53d6\u8fc7\u671f\u65f6\u95f4\u3002<\/p>\n
      \n
      \n <\/dt>\n
      \n   \u5982\u4f55\u5229\u7528Redis\u5b9e\u73b0\u6570\u636e\u5907\u4efd\u4e0e\u6062\u590d\n <\/dd>\n<\/dl>\n
      \n
      \n <\/dt>\n
      \n   PHP\u5f00\u53d1\u4e2d\u5982\u4f55\u4f7f\u7528Memcache\u8fdb\u884c\u6570\u636e\u7f13\u5b58\u548c\u8bfb\u53d6\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      Redis\u5982\u4f55\u5b9e\u73b0\u6570\u636e\u8fc7\u671f\u81ea\u52a8\u6e05...<\/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-202264","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202264","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=202264"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202264\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}