{"id":197474,"date":"2024-11-14T08:15:21","date_gmt":"2024-11-14T00:15:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/197474\/"},"modified":"2024-11-14T08:15:22","modified_gmt":"2024-11-14T00:15:22","slug":"%e5%88%a9%e7%94%a8redis%e4%be%86%e9%98%b2%e6%ad%a2%e4%b8%a6%e7%99%bc%e7%9a%84%e6%9c%89%e6%95%88%e7%ad%96%e7%95%a5%ef%bc%88redis%e9%98%b2%e6%ad%a2%e4%b8%a6%e7%99%bc%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/197474\/","title":{"rendered":"\u5229\u7528Redis\u4f86\u9632\u6b62\u4e26\u767c\u7684\u6709\u6548\u7b56\u7565\uff08redis\u9632\u6b62\u4e26\u767c\u7684\u65b9\u6cd5\uff09"},"content":{"rendered":"

\u5229\u7528Redis\u4f86\u9632\u6b62\u4e26\u767c\u7684\u6709\u6548\u7b56\u7565<\/h1>\n

\u5728\u7576\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u4e26\u767c\u8a2a\u554f\u662f\u4e00\u500b\u5e38\u898b\u7684\u6311\u6230\u3002\u7576\u591a\u500b\u7528\u6236\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3001\u6027\u80fd\u4e0b\u964d\u751a\u81f3\u7cfb\u7d71\u5d29\u6f70\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u7b56\u7565\u4f86\u6709\u6548\u9632\u6b62\u4e26\u767c\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u5229\u7528Redis\u4f86\u9632\u6b62\u4e26\u767c\u7684\u6709\u6548\u7b56\u7565\u3002<\/p>\n

1. \u4f7f\u7528\u5206\u5e03\u5f0f\u9396<\/h2>\n

\u5206\u5e03\u5f0f\u9396\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u9632\u6b62\u4e26\u767c\u7684\u7b56\u7565\u3002Redis\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u5206\u5e03\u5f0f\u9396\u5be6\u73fe\u3002\u901a\u904e\u4f7f\u7528Redis\u7684SETNX\u547d\u4ee4\uff0c\u53ef\u4ee5\u5728\u591a\u500b\u9032\u7a0b\u4e4b\u9593\u5be6\u73fe\u9396\u7684\u6a5f\u5236\u3002<\/p>\n

SETNX lock_key unique_lock_value\nEXPIRE lock_key 10\n<\/code><\/pre>\n
\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0cSETNX\u547d\u4ee4\u6703\u5728\u9396\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9396\uff0c\u4e26\u8fd4\u56de1\uff1b\u5982\u679c\u9396\u5df2\u5b58\u5728\uff0c\u5247\u8fd4\u56de0\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u7372\u5f97\u9396\u3002EXPIRE\u547d\u4ee4\u5247\u7528\u65bc\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n
2. \u4f7f\u7528Lua\u8173\u672c\u539f\u5b50\u64cd\u4f5c<\/h2>\n
Redis\u652f\u6301Lua\u8173\u672c\uff0c\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u5c07\u591a\u500b\u64cd\u4f5c\u5c01\u88dd\u5728\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\u4e2d\u57f7\u884c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u64cd\u4f5c\u904e\u7a0b\u4e2d\u51fa\u73fe\u4e26\u767c\u554f\u984c\u3002<\/p>\n
eval \"if redis.call('get', KEYS[1]) == ARGV[1] then return redis.call('del', KEYS[1]) else return 0 end\" 1 lock_key unique_lock_value\n<\/code><\/pre>\n
\u9019\u6bb5Lua\u8173\u672c\u6aa2\u67e5\u9396\u7684\u503c\u662f\u5426\u8207\u9810\u671f\u76f8\u7b26\uff0c\u5982\u679c\u76f8\u7b26\u5247\u522a\u9664\u9396\uff0c\u5426\u5247\u8fd4\u56de0\u3002\u9019\u6a23\u7684\u539f\u5b50\u64cd\u4f5c\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u4e26\u767c\u554f\u984c\u3002<\/p>\n
3. \u4f7f\u7528\u968a\u5217\u4f86\u63a7\u5236\u8acb\u6c42<\/h2>\n
\u53e6\u4e00\u7a2e\u9632\u6b62\u4e26\u767c\u7684\u7b56\u7565\u662f\u4f7f\u7528Redis\u7684\u5217\u8868\u4f5c\u70ba\u8acb\u6c42\u968a\u5217\u3002\u7576\u8acb\u6c42\u5230\u9054\u6642\uff0c\u5c07\u5176\u653e\u5165\u968a\u5217\u4e2d\uff0c\u7136\u5f8c\u7531\u5de5\u4f5c\u9032\u7a0b\u9010\u4e00\u8655\u7406\u8acb\u6c42\u3002<\/p>\n
LPUSH request_queue request_data\n<\/code><\/pre>\n
\u901a\u904e\u4f7f\u7528LPUSH\u547d\u4ee4\u5c07\u8acb\u6c42\u653e\u5165\u968a\u5217\uff0c\u7136\u5f8c\u4f7f\u7528BRPOP\u547d\u4ee4\u5f9e\u968a\u5217\u4e2d\u53d6\u51fa\u8acb\u6c42\u9032\u884c\u8655\u7406\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u8acb\u6c42\u6309\u7167\u9806\u5e8f\u8655\u7406\uff0c\u5f9e\u800c\u907f\u514d\u4e26\u767c\u554f\u984c\u3002<\/p>\n
4. \u4f7f\u7528\u9650\u6d41\u7b56\u7565<\/h2>\n
\u9650\u6d41\u662f\u4e00\u7a2e\u63a7\u5236\u8acb\u6c42\u983b\u7387\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u53ef\u4ee5\u9632\u6b62\u7cfb\u7d71\u904e\u8f09\u3002Redis\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u9650\u6d41\u7b56\u7565\uff0c\u4f8b\u5982\u4f7f\u7528\u4ee4\u724c\u6876\u6216\u6f0f\u6876\u7b97\u6cd5\u3002<\/p>\n
INCR request_count\nEXPIRE request_count 60\n<\/code><\/pre>\n
\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0cINCR\u547d\u4ee4\u7528\u65bc\u589e\u52a0\u8acb\u6c42\u8a08\u6578\uff0cEXPIRE\u547d\u4ee4\u5247\u8a2d\u7f6e\u8a08\u6578\u7684\u904e\u671f\u6642\u9593\u3002\u901a\u904e\u8a2d\u7f6e\u6700\u5927\u8acb\u6c42\u6578\uff0c\u53ef\u4ee5\u6709\u6548\u63a7\u5236\u4e26\u767c\u8acb\u6c42\u7684\u6578\u91cf\u3002<\/p>\n
5. \u4f7f\u7528\u7248\u672c\u865f\u63a7\u5236\u6578\u64da<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6578\u64da\u7684\u7248\u672c\u865f\u53ef\u4ee5\u7528\u4f86\u9632\u6b62\u4e26\u767c\u66f4\u65b0\u3002\u6bcf\u6b21\u66f4\u65b0\u6578\u64da\u6642\uff0c\u6aa2\u67e5\u7248\u672c\u865f\u662f\u5426\u5339\u914d\uff0c\u5982\u679c\u4e0d\u5339\u914d\u5247\u62d2\u7d55\u66f4\u65b0\u3002<\/p>\n
if current_version == expected_version then\n    update_data()\nend\n<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u5728\u6578\u64da\u7248\u672c\u4e00\u81f4\u7684\u60c5\u6cc1\u4e0b\u624d\u9032\u884c\u66f4\u65b0\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5229\u7528Redis\u4f86\u9632\u6b62\u4e26\u767c\u554f\u984c\u662f\u4e00\u7a2e\u6709\u6548\u7684\u7b56\u7565\uff0c\u901a\u904e\u5206\u5e03\u5f0f\u9396\u3001Lua\u8173\u672c\u539f\u5b50\u64cd\u4f5c\u3001\u8acb\u6c42\u968a\u5217\u3001\u9650\u6d41\u7b56\u7565\u4ee5\u53ca\u7248\u672c\u865f\u63a7\u5236\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u4e26\u767c\u8a2a\u554f\u5e36\u4f86\u7684\u6311\u6230\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u61c9\u5c0d\u4e26\u767c\u6311\u6230\uff0c\u78ba\u4fdd\u60a8\u7684\u61c9\u7528\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u5229\u7528Redis\u9632\u6b62\u4e26\u767c\u7684\u6709\u6548\u7b56\u7565\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-197474","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197474","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=197474"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197474\/revisions"}],"predecessor-version":[{"id":197475,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/197474\/revisions\/197475"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=197474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=197474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=197474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}