{"id":129341,"date":"2024-10-26T20:53:49","date_gmt":"2024-10-26T12:53:49","guid":{"rendered":"https:\/\/server.hk\/cnblog\/129341\/"},"modified":"2024-10-26T20:53:49","modified_gmt":"2024-10-26T12:53:49","slug":"redis%e9%8e%96%e7%8d%b2%e5%8f%96%e7%9a%84%e5%b9%be%e7%a8%ae%e6%9c%89%e6%95%88%e6%96%b9%e5%bc%8f%ef%bc%88redis%e9%8e%96%e7%8d%b2%e5%8f%96%e6%96%b9%e5%bc%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/129341\/","title":{"rendered":"Redis\u9396\u7372\u53d6\u7684\u5e7e\u7a2e\u6709\u6548\u65b9\u5f0f\uff08redis\u9396\u7372\u53d6\u65b9\u5f0f\uff09"},"content":{"rendered":"

Redis\u9396\u7372\u53d6\u7684\u5e7e\u7a2e\u6709\u6548\u65b9\u5f0f<\/h1>\n

\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u9632\u6b62\u7af6\u722d\u689d\u4ef6\u7684\u91cd\u8981\u624b\u6bb5\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7372\u53d6\u7684\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u6709\u6548\u7684Redis\u9396\u7372\u53d6\u65b9\u5f0f\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u9078\u64c7\u5408\u9069\u7684\u65b9\u6848\u3002<\/p>\n

1. \u57fa\u65bcSETNX\u547d\u4ee4\u7684\u9396<\/h2>\n

\u6700\u57fa\u672c\u7684\u9396\u7372\u53d6\u65b9\u5f0f\u662f\u4f7f\u7528Redis\u7684SETNX\u547d\u4ee4\u3002SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u9019\u4f7f\u5f97\u5b83\u6210\u70ba\u5be6\u73fe\u9396\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n

SETNX lock_key unique_lock_value\n<\/code><\/pre>\n
\u5982\u679c\u8fd4\u56de\u503c\u70ba1\uff0c\u5247\u8868\u793a\u9396\u7372\u53d6\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9396\u5df2\u7d93\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u901a\u5e38\u9084\u9700\u8981\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\uff1a<\/p>\n
SET lock_key unique_lock_value EX 10 NX\n<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u9396\u572810\u79d2\u5f8c\u81ea\u52d5\u91cb\u653e\uff0c\u907f\u514d\u56e0\u70ba\u7a0b\u5e8f\u7570\u5e38\u800c\u5c0e\u81f4\u7684\u9396\u6c38\u4e45\u4f54\u7528\u3002<\/p>\n
2. Redlock\u7b97\u6cd5<\/h2>\n
Redlock\u662f\u4e00\u7a2e\u5206\u4f48\u5f0f\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u9069\u7528\u65bc\u591a\u500bRedis\u5be6\u4f8b\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u6838\u5fc3\u601d\u60f3\u662f\u901a\u904e\u591a\u500bRedis\u5be6\u4f8b\u4f86\u63d0\u9ad8\u9396\u7684\u53ef\u9760\u6027\u3002<\/p>\n
Redlock\u7684\u7372\u53d6\u904e\u7a0b\u5982\u4e0b\uff1a<\/p>\n
    \n
  1. \u5728N\u500bRedis\u5be6\u4f8b\u4e2d\uff0c\u4f9d\u6b21\u5617\u8a66\u7372\u53d6\u9396\u3002<\/li>\n
  2. \u6bcf\u6b21\u7372\u53d6\u9396\u6642\uff0c\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u3002<\/li>\n
  3. \u5982\u679c\u6210\u529f\u7372\u53d6\u4e86\u5927\u591a\u6578\uff08N\/2 + 1\uff09\u5be6\u4f8b\u7684\u9396\uff0c\u5247\u8a8d\u70ba\u9396\u7372\u53d6\u6210\u529f\u3002<\/li>\n
  4. \u5982\u679c\u7372\u53d6\u5931\u6557\uff0c\u5247\u91cb\u653e\u5df2\u7372\u53d6\u7684\u9396\u3002<\/li>\n<\/ol>\n
    \u9019\u7a2e\u65b9\u6cd5\u80fd\u5920\u6709\u6548\u5730\u9632\u6b62\u55ae\u9ede\u6545\u969c\uff0c\u4e26\u63d0\u9ad8\u9396\u7684\u53ef\u7528\u6027\u3002<\/p>\n
    3. Lua\u8173\u672c\u9396<\/h2>\n
    \u4f7f\u7528Lua\u8173\u672c\u4f86\u7372\u53d6\u9396\u662f\u4e00\u7a2e\u539f\u5b50\u64cd\u4f5c\uff0c\u80fd\u5920\u907f\u514d\u7af6\u722d\u689d\u4ef6\u3002\u901a\u904e\u5c07\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u908f\u8f2f\u5c01\u88dd\u5728Lua\u8173\u672c\u4e2d\uff0c\u53ef\u4ee5\u78ba\u4fdd\u9019\u4e9b\u64cd\u4f5c\u5728Redis\u4e2d\u539f\u5b50\u57f7\u884c\u3002<\/p>\n
    \nlocal lock_key = KEYS[1]\nlocal unique_lock_value = ARGV[1]\nlocal expire_time = ARGV[2]\n\nif redis.call(\"SETNX\", lock_key, unique_lock_value) == 1 then\n    redis.call(\"EXPIRE\", lock_key, expire_time)\n    return 1\nelse\n    return 0\nend\n<\/code><\/pre>\n
    \u9019\u6a23\u7684\u65b9\u5f0f\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6548\u7387\uff0c\u9084\u80fd\u6e1b\u5c11\u9396\u7372\u53d6\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4\u3002<\/p>\n
    4. \u4f7f\u7528Redis\u7684\u8d85\u6642\u6a5f\u5236<\/h2>\n
    \u5728\u7372\u53d6\u9396\u6642\uff0c\u8a2d\u7f6e\u8d85\u6642\u6a5f\u5236\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u56e0\u70ba\u7a0b\u5e8f\u7570\u5e38\u5c0e\u81f4\u7684\u9396\u6c38\u4e45\u4f54\u7528\u3002\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u4f86\u5be6\u73fe\uff1a<\/p>\n
    SET lock_key unique_lock_value EX 10 NX\n<\/code><\/pre>\n
    \u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u9396\u572810\u79d2\u5f8c\u81ea\u52d5\u91cb\u653e\uff0c\u907f\u514d\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\u3002<\/p>\n
    5. \u9396\u7684\u91cb\u653e<\/h2>\n
    \u7121\u8ad6\u4f7f\u7528\u54ea\u7a2e\u9396\u7372\u53d6\u65b9\u5f0f\uff0c\u91cb\u653e\u9396\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u91cb\u653e\u9396\u6642\u9700\u8981\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u9396\uff0c\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u503c\u4f86\u5be6\u73fe\uff1a<\/p>\n
    \nif redis.call(\"GET\", lock_key) == unique_lock_value then\n    redis.call(\"DEL\", lock_key)\nend\n<\/code><\/pre>\n
    \u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u6b63\u78ba\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u9396\uff0c\u5f9e\u800c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u932f\u8aa4\u3002<\/p>\n
    \u7e3d\u7d50<\/h2>\n
    Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u6709\u6548\u7684\u9396\u7372\u53d6\u65b9\u5f0f\uff0c\u5305\u62ec\u57fa\u65bcSETNX\u547d\u4ee4\u7684\u9396\u3001Redlock\u7b97\u6cd5\u3001Lua\u8173\u672c\u9396\u4ee5\u53ca\u8d85\u6642\u6a5f\u5236\u7b49\u3002\u9078\u64c7\u5408\u9069\u7684\u9396\u7372\u53d6\u65b9\u5f0f\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6848\u3002<\/p>\n
    \u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u9999\u6e2fVPS<\/a>\u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u63a2\u7d22Redis\u9396\u7372\u53d6\u7684\u5e7e\u7a2e\u6709\u6548\u65b9\u5f0f\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u6578\u64da\u4e00\u81f4\u6027\uff0c\u78ba\u4fdd\u9ad8\u6548\u7684\u4e26\u767c\u63a7\u5236\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-129341","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129341","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=129341"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129341\/revisions"}],"predecessor-version":[{"id":129342,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/129341\/revisions\/129342"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=129341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=129341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=129341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}