{"id":161465,"date":"2024-11-04T06:39:37","date_gmt":"2024-11-03T22:39:37","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161465\/"},"modified":"2024-11-04T06:39:38","modified_gmt":"2024-11-03T22:39:38","slug":"%e5%9f%ba%e6%96%bc-redis-%e7%9a%84%e9%8e%96%e8%a1%9d%e7%aa%81%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88%ef%bc%88redis-%e8%a7%a3%e6%b1%ba%e9%8e%96%e8%a1%9d%e7%aa%81%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161465\/","title":{"rendered":"\u57fa\u65bc Redis \u7684\u9396\u885d\u7a81\u89e3\u6c7a\u65b9\u6848\uff08redis \u89e3\u6c7a\u9396\u885d\u7a81\uff09"},"content":{"rendered":"

\u57fa\u65bc Redis \u7684\u9396\u885d\u7a81\u89e3\u6c7a\u65b9\u6848\uff08redis \u89e3\u6c7a\u9396\u885d\u7a81\uff09<\/h1>\n

\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4f7f\u7528\u662f\u70ba\u4e86\u4fdd\u8b77\u5171\u4eab\u8cc7\u6e90\uff0c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002\u7136\u800c\uff0c\u9396\u7684\u885d\u7a81\u554f\u984c\u537b\u662f\u958b\u767c\u8005\u5728\u8a2d\u8a08\u7cfb\u7d71\u6642\u5fc5\u9808\u9762\u5c0d\u7684\u6311\u6230\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u89e3\u6c7a\u9396\u885d\u7a81\u7684\u65b9\u6848\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u57fa\u65bc Redis \u7684\u9396\u885d\u7a81\u89e3\u6c7a\u65b9\u6848\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u9396\u885d\u7a81\uff1f<\/h2>\n

\u9396\u885d\u7a81\u767c\u751f\u5728\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u540c\u6642\u5617\u8a66\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\u3002\u7576\u4e00\u500b\u9032\u7a0b\u7372\u5f97\u9396\u5f8c\uff0c\u5176\u4ed6\u9032\u7a0b\u5fc5\u9808\u7b49\u5f85\uff0c\u76f4\u5230\u9396\u88ab\u91cb\u653e\u3002\u5982\u679c\u9396\u7684\u6301\u6709\u6642\u9593\u904e\u9577\uff0c\u5c07\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u751a\u81f3\u6b7b\u9396\u7684\u60c5\u6cc1\u3002\u9019\u5728\u9ad8\u4f75\u767c\u7684\u74b0\u5883\u4e2d\u5c24\u70ba\u660e\u986f\u3002<\/p>\n

Redis \u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

Redis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u800c\u6709\u6548\u7684\u9396\u6a5f\u5236\uff0c\u901a\u5e38\u4f7f\u7528 SETNX \u547d\u4ee4\u4f86\u5be6\u73fe\u3002SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u5728\u9375\u4e0d\u5b58\u5728\u6642\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u9019\u4f7f\u5f97\u5b83\u6210\u70ba\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u7684\u7406\u60f3\u9078\u64c7\u3002<\/p>\n

\u57fa\u672c\u7684 Redis \u9396\u5be6\u73fe<\/h3>\n
SETNX lock_key unique_lock_value\nEXPIRE lock_key 10\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u7576\u4e00\u500b\u9032\u7a0b\u5617\u8a66\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u4f7f\u7528 SETNX \u547d\u4ee4\u8a2d\u7f6e\u4e00\u500b\u552f\u4e00\u7684\u9396\u503c\u3002\u5982\u679c\u6210\u529f\uff0c\u5247\u8868\u793a\u9396\u5df2\u7372\u5f97\uff0c\u4e26\u4e14\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\u4ee5\u9632\u6b62\u6b7b\u9396\u3002<\/p>\n
\u89e3\u6c7a\u9396\u885d\u7a81\u7684\u7b56\u7565<\/h2>\n
\u5728\u4f7f\u7528 Redis \u9396\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u9396\u885d\u7a81\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n
1. \u91cd\u8a66\u6a5f\u5236<\/h3>\n
\u7576\u4e00\u500b\u9032\u7a0b\u7121\u6cd5\u7372\u5f97\u9396\u6642\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u91cd\u8a66\u6a5f\u5236\uff0c\u5b9a\u671f\u5617\u8a66\u7372\u53d6\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u56e0\u9396\u885d\u7a81\u5c0e\u81f4\u7684\u7b49\u5f85\u6642\u9593\u3002<\/p>\n
while (true) {\n    if (SETNX lock_key unique_lock_value) {\n        EXPIRE lock_key 10\n        break\n    }\n    sleep(100) \/\/ \u7b49\u5f85 100 \u6beb\u79d2\u5f8c\u91cd\u8a66\n}\n<\/code><\/pre>\n
2. \u9396\u7684\u53ef\u91cd\u5165\u6027<\/h3>\n
\u53ef\u91cd\u5165\u9396\u5141\u8a31\u540c\u4e00\u500b\u9032\u7a0b\u591a\u6b21\u7372\u53d6\u9396\uff0c\u800c\u4e0d\u6703\u5c0e\u81f4\u6b7b\u9396\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728\u9396\u4e2d\u5b58\u5132\u7372\u53d6\u9396\u7684\u9032\u7a0b ID \u4f86\u5be6\u73fe\u3002<\/p>\n
if (current_process_id == get_lock_owner(lock_key)) {\n    \/\/ \u5141\u8a31\u91cd\u5165\n}\n<\/code><\/pre>\n
3. \u4f7f\u7528 Redlock \u7b97\u6cd5<\/h3>\n
Redlock \u662f\u4e00\u7a2e\u57fa\u65bc Redis \u7684\u5206\u4f48\u5f0f\u9396\u7b97\u6cd5\uff0c\u65e8\u5728\u63d0\u9ad8\u9396\u7684\u53ef\u9760\u6027\u3002\u5b83\u901a\u904e\u5728\u591a\u500b Redis \u5be6\u4f8b\u4e0a\u7372\u53d6\u9396\u4f86\u6e1b\u5c11\u55ae\u9ede\u6545\u969c\u7684\u98a8\u96aa\u3002<\/p>\n
function acquire_lock($resource, $ttl) {\n    $lock_value = uniqid();\n    $success = true;\n    foreach ($redis_instances as $instance) {\n        if (!$instance->set($resource, $lock_value, ['nx', 'ex' => $ttl])) {\n            $success = false;\n            break;\n        }\n    }\n    return $success ? $lock_value : false;\n}\n<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u57fa\u65bc Redis \u7684\u9396\u885d\u7a81\u89e3\u6c7a\u65b9\u6848\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u61c9\u5c0d\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\u7684\u9396\u885d\u7a81\u554f\u984c\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u57fa\u672c\u7684 SETNX \u547d\u4ee4\uff0c\u9084\u662f\u5be6\u73fe\u66f4\u8907\u96dc\u7684 Redlock \u7b97\u6cd5\uff0c\u958b\u767c\u8005\u90fd\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6848\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\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u57fa\u65bc Redis \u7684\u9396\u885d\u7a81\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u7cfb\u7d71\u6548\u7387\uff0c\u78ba\u4fdd\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\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-161465","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161465","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=161465"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161465\/revisions"}],"predecessor-version":[{"id":161466,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161465\/revisions\/161466"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}