{"id":196400,"date":"2024-11-13T23:16:28","date_gmt":"2024-11-13T15:16:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196400\/"},"modified":"2024-11-13T23:16:30","modified_gmt":"2024-11-13T15:16:30","slug":"%e5%9f%b7%e8%a1%8c%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e9%8e%96%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e4%b8%a6%e7%99%bc%e5%9f%b7%e8%a1%8c%ef%bc%88redis-%e7%b7%a9%e5%ad%98%e9%8e%96-%e4%b8%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196400\/","title":{"rendered":"\u57f7\u884c\u89e3\u6c7aRedis\u7de9\u5b58\u9396\u5be6\u73fe\u9ad8\u6548\u4e26\u767c\u57f7\u884c\uff08redis \u7de9\u5b58\u9396 \u4e26\u767c\uff09"},"content":{"rendered":"<h1 id=\"%e5%9f%b7%e8%a1%8c%e8%a7%a3%e6%b1%baredis%e7%b7%a9%e5%ad%98%e9%8e%96%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e4%b8%a6%e7%99%bc%e5%9f%b7%e8%a1%8c-gnJkUaJKRc\">\u57f7\u884c\u89e3\u6c7aRedis\u7de9\u5b58\u9396\u5be6\u73fe\u9ad8\u6548\u4e26\u767c\u57f7\u884c<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u7db2\u7d61\u61c9\u7528\u4e2d\uff0c\u6027\u80fd\u548c\u6548\u7387\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u7de9\u5b58\u89e3\u6c7a\u65b9\u6848\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e0b\u3002\u7136\u800c\uff0c\u7576\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\uff0c\u9019\u6642\u5c31\u9700\u8981\u4f7f\u7528\u9396\u4f86\u4fdd\u8b77\u9019\u4e9b\u8cc7\u6e90\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Redis\u5be6\u73fe\u7de9\u5b58\u9396\uff0c\u4ee5\u9054\u5230\u9ad8\u6548\u7684\u4e26\u767c\u57f7\u884c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e7%b7%a9%e5%ad%98%e9%8e%96%ef%bc%9f-gnJkUaJKRc\">\u4ec0\u9ebc\u662fRedis\u7de9\u5b58\u9396\uff1f<\/h2>\n<p>Redis\u7de9\u5b58\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u63a7\u5236\u5c0d\u5171\u4eab\u8cc7\u6e90\u8a2a\u554f\u7684\u6a5f\u5236\u3002\u7576\u4e00\u500b\u9032\u7a0b\u7372\u5f97\u9396\u6642\uff0c\u5176\u4ed6\u9032\u7a0b\u5fc5\u9808\u7b49\u5f85\uff0c\u76f4\u5230\u9396\u88ab\u91cb\u653e\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u4e0d\u4e00\u81f4\u548c\u7af6\u722d\u689d\u4ef6\u7684\u767c\u751f\u3002Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u5be6\u73fe\u9396\uff0c\u5176\u4e2d\u6700\u5e38\u898b\u7684\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8setnx%e5%91%bd%e4%bb%a4%e5%af%a6%e7%8f%be%e9%8e%96-gnJkUaJKRc\">\u4f7f\u7528SETNX\u547d\u4ee4\u5be6\u73fe\u9396<\/h2>\n<p>SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u4e00\u500b\u9396\u3002\u7576\u4e00\u500b\u9032\u7a0b\u5617\u8a66\u7372\u53d6\u9396\u6642\uff0c\u5b83\u6703\u57f7\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>SETNX lock_key unique_lock_value<\/code><\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u70ba1\uff0c\u5247\u8868\u793a\u9396\u6210\u529f\u7372\u53d6\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002\u5728\u7372\u53d6\u9396\u5f8c\uff0c\u9032\u7a0b\u53ef\u4ee5\u57f7\u884c\u9700\u8981\u4fdd\u8b77\u7684\u64cd\u4f5c\uff0c\u5b8c\u6210\u5f8c\u5fc5\u9808\u91cb\u653e\u9396\uff1a<\/p>\n<pre><code>DEL lock_key<\/code><\/pre>\n<h2 id=\"%e9%8e%96%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-gnJkUaJKRc\">\u9396\u7684\u904e\u671f\u6642\u9593<\/h2>\n<p>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u767c\u751f\uff0c\u5efa\u8b70\u5728\u7372\u53d6\u9396\u6642\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\u3002\u9019\u6a23\u5373\u4f7f\u9032\u7a0b\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u5d29\u6f70\uff0c\u9396\u4e5f\u6703\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u91cb\u653e\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff1a<\/p>\n<pre><code>SET lock_key unique_lock_value EX 10 NX<\/code><\/pre>\n<p>\u9019\u689d\u547d\u4ee4\u6703\u5728\u6210\u529f\u7372\u53d6\u9396\u7684\u540c\u6642\uff0c\u5c07\u9396\u7684\u904e\u671f\u6642\u9593\u8a2d\u7f6e\u70ba10\u79d2\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8lua%e8%85%b3%e6%9c%ac%e5%af%a6%e7%8f%be%e5%8e%9f%e5%ad%90%e6%93%8d%e4%bd%9c-gnJkUaJKRc\">\u4f7f\u7528Lua\u8173\u672c\u5be6\u73fe\u539f\u5b50\u64cd\u4f5c<\/h2>\n<p>\u70ba\u4e86\u78ba\u4fdd\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528Redis\u7684Lua\u8173\u672c\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u5728\u7372\u53d6\u9396\u548c\u57f7\u884c\u64cd\u4f5c\u4e4b\u9593\u7684\u6642\u9593\u7a97\u53e3\uff0c\u5f9e\u800c\u6e1b\u5c11\u7af6\u722d\u689d\u4ef6\u7684\u98a8\u96aa\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8bLua\u8173\u672c\uff1a<\/p>\n<pre><code>\nlocal lock_key = KEYS[1]\nlocal unique_lock_value = ARGV[1]\nlocal lock_timeout = ARGV[2]\n\nif redis.call(\"SETNX\", lock_key, unique_lock_value) == 1 then\n    redis.call(\"EXPIRE\", lock_key, lock_timeout)\n    return 1\nelse\n    return 0\nend\n<\/code><\/pre>\n<p>\u9019\u6bb5\u8173\u672c\u6703\u6aa2\u67e5\u9396\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u4e0d\u5b58\u5728\u5247\u5275\u5efa\u4e26\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-gnJkUaJKRc\">\u8655\u7406\u9396\u7684\u91cb\u653e<\/h2>\n<p>\u5728\u91cb\u653e\u9396\u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u53ea\u6709\u6301\u6709\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u5b83\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u503c\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>\nif redis.call(\"GET\", lock_key) == unique_lock_value then\n    redis.call(\"DEL\", lock_key)\nend\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u7372\u53d6\u9396\u7684\u9032\u7a0b\u624d\u80fd\u91cb\u653e\u5b83\uff0c\u5f9e\u800c\u907f\u514d\u5176\u4ed6\u9032\u7a0b\u8aa4\u91cb\u653e\u9396\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-gnJkUaJKRc\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528Redis\u5be6\u73fe\u7de9\u5b58\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u7ba1\u7406\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u7684\u8cc7\u6e90\u8a2a\u554f\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528SETNX\u547d\u4ee4\u3001\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u4ee5\u53ca\u5229\u7528Lua\u8173\u672c\u4f86\u78ba\u4fdd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u986f\u8457\u63d0\u5347\u61c9\u7528\u7684\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5229\u7528Redis\u7de9\u5b58\u9396\u5be6\u73fe\u9ad8\u6548\u7684\u4e26\u767c\u57f7\u884c\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u8cc7\u6e90\u5229\u7528\u7387\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-196400","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196400","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=196400"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196400\/revisions"}],"predecessor-version":[{"id":196401,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196400\/revisions\/196401"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}