{"id":126755,"date":"2024-10-26T07:22:19","date_gmt":"2024-10-25T23:22:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/126755\/"},"modified":"2024-10-26T07:22:20","modified_gmt":"2024-10-25T23:22:20","slug":"redis-%e5%bc%b7%e5%8a%9b%e6%b8%85%e9%99%a4%e9%8e%96%ef%bc%8c%e7%b2%be%e5%bd%a9%e4%b8%8d%e5%ae%b9%e9%8c%af%e9%81%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/126755\/","title":{"rendered":"Redis \u5f37\u529b\u6e05\u9664\u9396\uff0c\u7cbe\u5f69\u4e0d\u5bb9\u932f\u904e"},"content":{"rendered":"<h1 id=\"redis-%e5%bc%b7%e5%8a%9b%e6%b8%85%e9%99%a4%e9%8e%96%ef%bc%8c%e7%b2%be%e5%bd%a9%e4%b8%8d%e5%ae%b9%e9%8c%af%e9%81%8e-esXHvCSJmi\">Redis \u5f37\u529b\u6e05\u9664\u9396\uff0c\u7cbe\u5f69\u4e0d\u5bb9\u932f\u904e<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6027\u80fd\u548c\u6548\u7387\u662f\u6bcf\u500b\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u6240\u8ffd\u6c42\u7684\u76ee\u6a19\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u56e0\u5176\u5353\u8d8a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u7136\u800c\uff0c\u96a8\u8457\u61c9\u7528\u7a0b\u5e8f\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6e90\u548c\u907f\u514d\u7af6\u722d\u689d\u4ef6\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u5728\u9019\u65b9\u9762\uff0cRedis \u7684\u5f37\u529b\u6e05\u9664\u9396\uff08Strong Lock\uff09\u529f\u80fd\u63d0\u4f9b\u4e86\u4e00\u7a2e\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u63a7\u5236\u8cc7\u6e90\u7684\u8a2a\u554f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-redis-%e5%bc%b7%e5%8a%9b%e6%b8%85%e9%99%a4%e9%8e%96%ef%bc%9f-esXHvCSJmi\">\u4ec0\u9ebc\u662f Redis \u5f37\u529b\u6e05\u9664\u9396\uff1f<\/h2>\n<p>Redis \u5f37\u529b\u6e05\u9664\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u4fdd\u8b77\u5171\u4eab\u8cc7\u6e90\u7684\u6a5f\u5236\u3002\u7576\u591a\u500b\u9032\u7a0b\u6216\u7dda\u7a0b\u9700\u8981\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\uff0c\u5f37\u529b\u6e05\u9664\u9396\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u5920\u5728\u7279\u5b9a\u6642\u9593\u5167\u8a2a\u554f\u8a72\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u7af6\u722d\u689d\u4ef6\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"%e5%bc%b7%e5%8a%9b%e6%b8%85%e9%99%a4%e9%8e%96%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-esXHvCSJmi\">\u5f37\u529b\u6e05\u9664\u9396\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>Redis \u7684\u5f37\u529b\u6e05\u9664\u9396\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528 SETNX \u547d\u4ee4\u4f86\u5be6\u73fe\u7684\u3002SETNX \u547d\u4ee4\u7684\u5168\u540d\u662f &#8220;SET if Not eXists&#8221;\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u53ea\u6709\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u624d\u6703\u8a2d\u7f6e\u9375\u7684\u503c\u3002\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u9396\u7684\u6a5f\u5236\u3002<\/p>\n<pre><code>SETNX lock_key unique_lock_value\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c`lock_key` \u662f\u6211\u5011\u7528\u4f86\u8868\u793a\u9396\u7684\u9375\uff0c\u800c `unique_lock_value` \u662f\u4e00\u500b\u552f\u4e00\u7684\u503c\uff0c\u7528\u65bc\u6a19\u8b58\u9396\u7684\u64c1\u6709\u8005\u3002\u5982\u679c SETNX \u8fd4\u56de 1\uff0c\u5247\u8868\u793a\u9396\u6210\u529f\u7372\u53d6\uff1b\u5982\u679c\u8fd4\u56de 0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%9a%84%e9%87%8b%e6%94%be-esXHvCSJmi\">\u9396\u7684\u91cb\u653e<\/h2>\n<p>\u5728\u4f7f\u7528\u5f37\u529b\u6e05\u9664\u9396\u6642\uff0c\u91cb\u653e\u9396\u662f\u540c\u6a23\u91cd\u8981\u7684\u3002\u70ba\u4e86\u907f\u514d\u6b7b\u9396\u7684\u60c5\u6cc1\uff0c\u6211\u5011\u9700\u8981\u78ba\u4fdd\u53ea\u6709\u9396\u7684\u64c1\u6709\u8005\u624d\u80fd\u91cb\u653e\u9396\u3002\u9019\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5\u9396\u7684\u503c\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>if (get(lock_key) == unique_lock_value) {\n    del(lock_key);\n}\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u6aa2\u67e5\u7576\u524d\u9396\u7684\u503c\u662f\u5426\u8207\u64c1\u6709\u8005\u7684\u552f\u4e00\u503c\u76f8\u540c\uff0c\u53ea\u6709\u5728\u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\u624d\u6703\u91cb\u653e\u9396\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%bc%b7%e5%8a%9b%e6%b8%85%e9%99%a4%e9%8e%96%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-esXHvCSJmi\">\u4f7f\u7528\u5f37\u529b\u6e05\u9664\u9396\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u9396\u7684\u8d85\u6642\u8a2d\u7f6e\uff1a<\/strong>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u5efa\u8b70\u5728\u8a2d\u7f6e\u9396\u6642\u540c\u6642\u8a2d\u7f6e\u4e00\u500b\u8d85\u6642\u6642\u9593\uff0c\u9019\u6a23\u5373\u4f7f\u9032\u7a0b\u5d29\u6f70\uff0c\u9396\u4e5f\u80fd\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u81ea\u52d5\u91cb\u653e\u3002<\/li>\n<li><strong>\u907f\u514d\u9577\u6642\u9593\u6301\u6709\u9396\uff1a<\/strong>\u5728\u6301\u6709\u9396\u7684\u671f\u9593\uff0c\u61c9\u76e1\u91cf\u6e1b\u5c11\u57f7\u884c\u7684\u64cd\u4f5c\uff0c\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u80fd\u3002<\/li>\n<li><strong>\u4f7f\u7528 Lua \u8173\u672c\uff1a<\/strong>\u70ba\u4e86\u78ba\u4fdd\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528 Redis \u7684 Lua \u8173\u672c\u4f86\u5be6\u73fe\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-esXHvCSJmi\">\u7d50\u8ad6<\/h2>\n<p>Redis \u7684\u5f37\u529b\u6e05\u9664\u9396\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u7ba1\u7406\u8cc7\u6e90\u7684\u8a2a\u554f\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u9396\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9748\u6d3b\u904b\u7528\uff0c\u4e26\u6ce8\u610f\u9396\u7684\u7ba1\u7406\u548c\u91cb\u653e\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/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":"<p>\u63a2\u7d22Redis\u5f37\u529b\u6e05\u9664\u9396\u7684\u9b45\u529b\uff0c\u63d0\u5347\u7cfb\u7d71\u6548\u80fd\uff0c\u8b93\u4f60\u7684\u61c9\u7528\u904b\u884c\u66f4\u6d41\u66a2\uff0c\u7cbe\u5f69\u5167\u5bb9\u4e0d\u5bb9\u932f\u904e\uff01<\/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-126755","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126755","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=126755"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126755\/revisions"}],"predecessor-version":[{"id":126756,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/126755\/revisions\/126756"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=126755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=126755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=126755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}