{"id":99192,"date":"2024-10-21T08:54:16","date_gmt":"2024-10-21T00:54:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/99192\/"},"modified":"2024-10-21T08:54:17","modified_gmt":"2024-10-21T00:54:17","slug":"redis-%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%e6%9b%b4%e6%96%b0%e5%a2%9e%e5%bc%b7%e7%89%88%e6%9c%ac%e8%99%9f%e4%bf%9d%e9%9a%9c%e5%ae%89%e5%85%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/99192\/","title":{"rendered":"Redis \u5206\u5e03\u5f0f\u9396\u66f4\u65b0\u589e\u5f37\u7248\u672c\u865f\u4fdd\u969c\u5b89\u5168"},"content":{"rendered":"<h1 id=\"redis-%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%e6%9b%b4%e6%96%b0%e5%a2%9e%e5%bc%b7%e7%89%88%e6%9c%ac%e8%99%9f%e4%bf%9d%e9%9a%9c%e5%ae%89%e5%85%a8-OaeAhMlgwc\">Redis \u5206\u5e03\u5f0f\u9396\u66f4\u65b0\u589e\u5f37\u7248\u672c\u865f\u4fdd\u969c\u5b89\u5168<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u5e03\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u8cc7\u6e90\u7684\u7af6\u722d\u548c\u6578\u64da\u7684\u4e00\u81f4\u6027\u662f\u5169\u500b\u91cd\u8981\u7684\u6311\u6230\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\uff0cRedis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u2014\u2014\u5206\u5e03\u5f0f\u9396\u3002\u672c\u6587\u5c07\u63a2\u8a0e Redis \u5206\u5e03\u5f0f\u9396\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u5982\u4f55\u901a\u904e\u7248\u672c\u865f\u4f86\u589e\u5f37\u5b89\u5168\u6027\uff0c\u4ee5\u53ca\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"redis-%e5%88%86%e5%b8%83%e5%bc%8f%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-OaeAhMlgwc\">Redis \u5206\u5e03\u5f0f\u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5206\u5e03\u5f0f\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u591a\u500b\u9032\u7a0b\u6216\u670d\u52d9\u4e4b\u9593\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\u7684\u6a5f\u5236\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u7c21\u55ae\u800c\u6709\u6548\u7684\u5206\u5e03\u5f0f\u9396\u5be6\u73fe\u3002\u5176\u57fa\u672c\u539f\u7406\u662f\u901a\u904e\u8a2d\u7f6e\u4e00\u500b\u9375\u4f86\u8868\u793a\u9396\u7684\u72c0\u614b\uff0c\u7576\u4e00\u500b\u9032\u7a0b\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u8a2d\u7f6e\u9019\u500b\u9375\uff0c\u4e26\u5728\u5b8c\u6210\u64cd\u4f5c\u5f8c\u522a\u9664\u5b83\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e5%af%a6%e7%8f%be-OaeAhMlgwc\">\u57fa\u672c\u5be6\u73fe<\/h3>\n<pre><code>\nSET lock_key unique_lock_value NX PX 30000\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u4e2d\uff0c`lock_key` \u662f\u9396\u7684\u540d\u7a31\uff0c`unique_lock_value` \u662f\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff0c`NX` \u8868\u793a\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u6642\u624d\u6703\u8a2d\u7f6e\uff0c`PX 30000` \u5247\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u70ba 30 \u79d2\u3002<\/p>\n<h2 id=\"%e7%89%88%e6%9c%ac%e8%99%9f%e7%9a%84%e5%bc%95%e5%85%a5-OaeAhMlgwc\">\u7248\u672c\u865f\u7684\u5f15\u5165<\/h2>\n<p>\u5728\u4f7f\u7528\u5206\u5e03\u5f0f\u9396\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u9396\u7684\u91cd\u5165\u554f\u984c\u6216\u9396\u7684\u904e\u671f\u554f\u984c\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\uff0c\u53ef\u4ee5\u5f15\u5165\u7248\u672c\u865f\u4f86\u589e\u5f37\u9396\u7684\u5b89\u5168\u6027\u3002\u6bcf\u6b21\u7372\u53d6\u9396\u6642\uff0c\u9664\u4e86\u8a2d\u7f6e\u9396\u7684\u552f\u4e00\u6a19\u8b58\u7b26\u5916\uff0c\u9084\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u7248\u672c\u865f\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u6b63\u78ba\u7248\u672c\u865f\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u9396\u3002<\/p>\n<h3 id=\"%e7%89%88%e6%9c%ac%e8%99%9f%e7%9a%84%e5%af%a6%e7%8f%be-OaeAhMlgwc\">\u7248\u672c\u865f\u7684\u5be6\u73fe<\/h3>\n<pre><code>\nSET lock_key unique_lock_value:version_number NX PX 30000\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c`version_number` \u662f\u4e00\u500b\u6574\u6578\uff0c\u6bcf\u6b21\u7372\u53d6\u9396\u6642\u90fd\u6703\u81ea\u589e\u3002\u7576\u9032\u7a0b\u91cb\u653e\u9396\u6642\uff0c\u5b83\u9700\u8981\u6aa2\u67e5\u7576\u524d\u7684\u7248\u672c\u865f\u662f\u5426\u8207\u81ea\u5df1\u6301\u6709\u7684\u7248\u672c\u865f\u4e00\u81f4\uff0c\u53ea\u6709\u4e00\u81f4\u6642\u624d\u80fd\u91cb\u653e\u9396\u3002<\/p>\n<pre><code>\nif (current_version_number == held_version_number) {\n    DEL lock_key\n}\n<\/code><\/pre>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e4%b8%ad%e7%9a%84%e7%a4%ba%e4%be%8b-OaeAhMlgwc\">\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6709\u4e00\u500b\u5206\u5e03\u5f0f\u7cfb\u7d71\u9700\u8981\u5c0d\u7528\u6236\u7684\u8cec\u6236\u9918\u984d\u9032\u884c\u66f4\u65b0\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528 Redis \u5206\u5e03\u5f0f\u9396\u53ef\u4ee5\u78ba\u4fdd\u540c\u4e00\u6642\u9593\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u5c0d\u8cec\u6236\u9918\u984d\u9032\u884c\u4fee\u6539\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nfunction update_balance(user_id, amount) {\n    lock_key = \"lock:user:\" + user_id\n    version_number = get_current_version(user_id)\n\n    if (SET(lock_key, unique_lock_value + \":\" + version_number, NX, PX 30000)) {\n        \/\/ \u7372\u53d6\u9396\u6210\u529f\n        current_balance = get_balance(user_id)\n        new_balance = current_balance + amount\n        set_balance(user_id, new_balance)\n        \n        \/\/ \u91cb\u653e\u9396\n        if (current_version_number == version_number) {\n            DEL lock_key\n        }\n    } else {\n        \/\/ \u7372\u53d6\u9396\u5931\u6557\uff0c\u91cd\u8a66\u6216\u8fd4\u56de\u932f\u8aa4\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-OaeAhMlgwc\">\u7d50\u8ad6<\/h2>\n<p>Redis \u5206\u5e03\u5f0f\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u7528\u65bc\u7ba1\u7406\u591a\u500b\u9032\u7a0b\u5c0d\u5171\u4eab\u8cc7\u6e90\u7684\u8a2a\u554f\u3002\u901a\u904e\u5f15\u5165\u7248\u672c\u865f\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u589e\u5f37\u9396\u7684\u5b89\u5168\u6027\uff0c\u907f\u514d\u91cd\u5165\u548c\u904e\u671f\u554f\u984c\u3002\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u9019\u7a2e\u65b9\u6cd5\u80fd\u5920\u6709\u6548\u5730\u4fdd\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u5206\u5e03\u5f0f\u7cfb\u7d71\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis \u5206\u5e03\u5f0f\u9396\u66f4\u65b0\u589e\u5f37\u7248\u672c\u865f\uff0c\u78ba\u4fdd\u5b89\u5168\u6027\u8207\u4e00\u81f4\u6027\uff0c\u9632\u6b62\u6578\u64da\u7af6\u722d\uff0c\u63d0\u5347\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u53ef\u9760\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-99192","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/99192","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=99192"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/99192\/revisions"}],"predecessor-version":[{"id":99193,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/99192\/revisions\/99193"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=99192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=99192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=99192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}