{"id":128373,"date":"2024-10-26T13:40:17","date_gmt":"2024-10-26T05:40:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/128373\/"},"modified":"2024-10-26T13:40:18","modified_gmt":"2024-10-26T05:40:18","slug":"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e9%8e%96%e9%87%8d%e5%85%a5%e6%8a%80%e8%a1%93","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/128373\/","title":{"rendered":"Redis \u5be6\u73fe\u7684\u9396\u91cd\u5165\u6280\u8853"},"content":{"rendered":"<h1 id=\"redis-%e5%af%a6%e7%8f%be%e7%9a%84%e9%8e%96%e9%87%8d%e5%85%a5%e6%8a%80%e8%a1%93-Nzpdbyxhlq\">Redis \u5be6\u73fe\u7684\u9396\u91cd\u5165\u6280\u8853<\/h1>\n<p>\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\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u5176\u4e2d\u91cd\u5165\u9396\uff08Reentrant Lock\uff09\u662f\u4e00\u7a2e\u7279\u5225\u6709\u7528\u7684\u9396\u985e\u578b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u5be6\u73fe\u7684\u9396\u91cd\u5165\u6280\u8853\uff0c\u5305\u62ec\u5176\u539f\u7406\u3001\u512a\u52e2\u53ca\u5be6\u969b\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%87%8d%e5%85%a5%e9%8e%96%ef%bc%9f-Nzpdbyxhlq\">\u4ec0\u9ebc\u662f\u91cd\u5165\u9396\uff1f<\/h2>\n<p>\u91cd\u5165\u9396\u662f\u4e00\u7a2e\u5141\u8a31\u540c\u4e00\u500b\u7dda\u7a0b\u591a\u6b21\u7372\u53d6\u9396\u7684\u9396\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u4e00\u500b\u7dda\u7a0b\u5df2\u7d93\u6301\u6709\u9396\uff0c\u5247\u5b83\u53ef\u4ee5\u518d\u6b21\u7372\u53d6\u8a72\u9396\u800c\u4e0d\u6703\u9020\u6210\u6b7b\u9396\u3002\u9019\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u7576\u4e00\u500b\u65b9\u6cd5\u8abf\u7528\u53e6\u4e00\u500b\u9700\u8981\u76f8\u540c\u9396\u7684\u5167\u90e8\u65b9\u6cd5\u6642\u3002<\/p>\n<h2 id=\"redis-%e4%b8%ad%e7%9a%84%e9%87%8d%e5%85%a5%e9%8e%96%e5%af%a6%e7%8f%be-Nzpdbyxhlq\">Redis \u4e2d\u7684\u91cd\u5165\u9396\u5be6\u73fe<\/h2>\n<p>\u5728 Redis \u4e2d\uff0c\u91cd\u5165\u9396\u7684\u5be6\u73fe\u901a\u5e38\u4f9d\u8cf4\u65bc\u9375\u7684\u8a2d\u7f6e\u548c\u8a08\u6578\u5668\u7684\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u91cd\u5165\u9396\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>SET lock_key thread_id NX PX 30000\nINCR lock_key_count\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u9996\u5148\u4f7f\u7528 `SET` \u547d\u4ee4\u5617\u8a66\u7372\u53d6\u9396\u3002\u5982\u679c\u9396\u4e0d\u5b58\u5728\uff08`NX`\uff09\uff0c\u5247\u8a2d\u7f6e\u9396\u4e26\u6307\u5b9a\u904e\u671f\u6642\u9593\uff08`PX`\uff09\u3002\u63a5\u8457\uff0c\u4f7f\u7528 `INCR` \u547d\u4ee4\u589e\u52a0\u9396\u7684\u8a08\u6578\u5668\uff0c\u9019\u6a23\u540c\u4e00\u500b\u7dda\u7a0b\u53ef\u4ee5\u591a\u6b21\u7372\u53d6\u9396\u3002<\/p>\n<h3 id=\"%e9%87%8b%e6%94%be%e9%8e%96-Nzpdbyxhlq\">\u91cb\u653e\u9396<\/h3>\n<p>\u91cb\u653e\u91cd\u5165\u9396\u6642\uff0c\u9700\u8981\u6aa2\u67e5\u7576\u524d\u7dda\u7a0b\u662f\u5426\u6301\u6709\u9396\uff0c\u4e26\u6839\u64da\u8a08\u6578\u5668\u7684\u503c\u9032\u884c\u76f8\u61c9\u7684\u64cd\u4f5c\uff1a<\/p>\n<pre><code>if (lock_key_count == 1) {\n    DEL lock_key\n} else {\n    DECR lock_key_count\n}\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u9996\u5148\u6aa2\u67e5\u7576\u524d\u7dda\u7a0b\u7684\u8a08\u6578\u5668\u3002\u5982\u679c\u8a08\u6578\u5668\u70ba 1\uff0c\u5247\u8868\u793a\u8a72\u7dda\u7a0b\u662f\u6700\u5f8c\u4e00\u6b21\u6301\u6709\u9396\uff0c\u9019\u6642\u53ef\u4ee5\u5b89\u5168\u5730\u522a\u9664\u9396\uff1b\u5982\u679c\u8a08\u6578\u5668\u5927\u65bc 1\uff0c\u5247\u53ea\u9700\u6e1b\u5c11\u8a08\u6578\u5668\u7684\u503c\u3002<\/p>\n<h2 id=\"%e9%87%8d%e5%85%a5%e9%8e%96%e7%9a%84%e5%84%aa%e5%8b%a2-Nzpdbyxhlq\">\u91cd\u5165\u9396\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u907f\u514d\u6b7b\u9396\uff1a<\/strong>\u91cd\u5165\u9396\u5141\u8a31\u540c\u4e00\u7dda\u7a0b\u591a\u6b21\u7372\u53d6\u9396\uff0c\u5f9e\u800c\u907f\u514d\u4e86\u56e0\u70ba\u591a\u6b21\u8acb\u6c42\u540c\u4e00\u9396\u800c\u5c0e\u81f4\u7684\u6b7b\u9396\u60c5\u6cc1\u3002<\/li>\n<li><strong>\u7c21\u5316\u4ee3\u78bc\uff1a<\/strong>\u5728\u9700\u8981\u591a\u6b21\u7372\u53d6\u9396\u7684\u60c5\u6cc1\u4e0b\uff0c\u91cd\u5165\u9396\u53ef\u4ee5\u7c21\u5316\u4ee3\u78bc\u7d50\u69cb\uff0c\u6e1b\u5c11\u4e86\u5c0d\u9396\u7684\u7ba1\u7406\u8907\u96dc\u6027\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6027\u80fd\uff1a<\/strong>\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\uff0c\u91cd\u5165\u9396\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u6e1b\u5c11\u4e86\u9396\u7684\u7af6\u722d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-Nzpdbyxhlq\">\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u91cd\u5165\u9396\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u4e2d\uff0c\u7576\u7528\u6236\u5728\u7d50\u5e33\u904e\u7a0b\u4e2d\u9700\u8981\u591a\u6b21\u6aa2\u67e5\u5eab\u5b58\u6642\uff0c\u91cd\u5165\u9396\u53ef\u4ee5\u78ba\u4fdd\u5728\u6aa2\u67e5\u5eab\u5b58\u7684\u904e\u7a0b\u4e2d\u4e0d\u6703\u51fa\u73fe\u7af6\u722d\u689d\u4ef6\uff0c\u5f9e\u800c\u4fdd\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u53e6\u4e00\u500b\u4f8b\u5b50\u662f\u5728\u5fae\u670d\u52d9\u67b6\u69cb\u4e2d\uff0c\u7576\u4e00\u500b\u670d\u52d9\u9700\u8981\u8abf\u7528\u53e6\u4e00\u500b\u670d\u52d9\u4e26\u4e14\u9700\u8981\u4fdd\u6301\u67d0\u4e9b\u72c0\u614b\u6642\uff0c\u91cd\u5165\u9396\u53ef\u4ee5\u78ba\u4fdd\u72c0\u614b\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u56e0\u70ba\u591a\u6b21\u8acb\u6c42\u800c\u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-Nzpdbyxhlq\">\u7e3d\u7d50<\/h2>\n<p>Redis \u5be6\u73fe\u7684\u9396\u91cd\u5165\u6280\u8853\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u89e3\u6c7a\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u9396\u7ba1\u7406\u554f\u984c\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u91cd\u5165\u9396\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002\u5728\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u8003\u616e\u5230 Redis \u7684\u7279\u6027\uff0c\u53ef\u4ee5\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u66f4\u597d\u7684\u652f\u6301\u3002\u7121\u8ad6\u662f\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u9084\u662f\u7a69\u5b9a\u7684\u670d\u52d9\u5668\u6027\u80fd\uff0cRedis \u90fd\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u5be6\u73fe\u7684\u9396\u91cd\u5165\u6280\u8853\uff0c\u63d0\u5347\u7cfb\u7d71\u6548\u7387\u8207\u5b89\u5168\u6027\uff0c\u78ba\u4fdd\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\u7684\u8cc7\u6e90\u7ba1\u7406\u66f4\u70ba\u53ef\u9760\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-128373","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128373","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=128373"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128373\/revisions"}],"predecessor-version":[{"id":128374,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/128373\/revisions\/128374"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=128373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=128373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=128373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}