{"id":164541,"date":"2024-11-05T08:46:20","date_gmt":"2024-11-05T00:46:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/164541\/"},"modified":"2024-11-05T08:46:21","modified_gmt":"2024-11-05T00:46:21","slug":"%e8%ad%a6%e6%83%95redis%e9%8e%96%e7%8d%b2%e5%8f%96%e5%a4%b1%e6%95%97%ef%bc%88redis%e9%8e%96%e7%8d%b2%e5%8f%96%e5%a4%b1%e6%95%97%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/164541\/","title":{"rendered":"\u8b66\u60d5Redis\u9396\u7372\u53d6\u5931\u6557\uff08redis\u9396\u7372\u53d6\u5931\u6557\uff09"},"content":{"rendered":"<h1 id=\"%e8%ad%a6%e6%83%95redis%e9%8e%96%e7%8d%b2%e5%8f%96%e5%a4%b1%e6%95%97%ef%bc%88redis%e9%8e%96%e7%8d%b2%e5%8f%96%e5%a4%b1%e6%95%97%ef%bc%89-KNMxTvqDjY\">\u8b66\u60d5Redis\u9396\u7372\u53d6\u5931\u6557\uff08redis\u9396\u7372\u53d6\u5931\u6557\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0cRedis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u6301\u4e45\u5316\u7b49\u5834\u666f\u3002\u7531\u65bc\u5176\u9ad8\u6027\u80fd\u548c\u7c21\u55ae\u6613\u7528\u7684\u7279\u6027\uff0cRedis\u6210\u70ba\u8a31\u591a\u958b\u767c\u8005\u7684\u9996\u9078\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528Redis\u9032\u884c\u9396\u7ba1\u7406\u6642\uff0c\u958b\u767c\u8005\u5e38\u5e38\u6703\u9047\u5230\u9396\u7372\u53d6\u5931\u6557\u7684\u554f\u984c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u9396\u7372\u53d6\u5931\u6557\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"redis%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-KNMxTvqDjY\">Redis\u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u9632\u6b62\u591a\u500b\u9032\u7a0b\u540c\u6642\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\uff0c\u5f9e\u800c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002Redis\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u7684\u9396\u5be6\u73fe\u65b9\u5f0f\uff0c\u901a\u5e38\u4f7f\u7528SETNX\u547d\u4ee4\u4f86\u5275\u5efa\u9396\u3002SETNX\u547d\u4ee4\u7684\u5168\u540d\u662f\u201cSET if Not eXists\u201d\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<\/p>\n<pre><code>SETNX lock_key unique_lock_value\n<\/code><\/pre>\n<p>\u5982\u679cSETNX\u8fd4\u56de1\uff0c\u5247\u8868\u793a\u9396\u7372\u53d6\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u9032\u7a0b\u7372\u53d6\u3002<\/p>\n<h2 id=\"%e9%8e%96%e7%8d%b2%e5%8f%96%e5%a4%b1%e6%95%97%e7%9a%84%e5%8e%9f%e5%9b%a0-KNMxTvqDjY\">\u9396\u7372\u53d6\u5931\u6557\u7684\u539f\u56e0<\/h2>\n<p>\u9396\u7372\u53d6\u5931\u6557\u7684\u539f\u56e0\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u9396\u7684\u7af6\u722d\uff1a<\/strong>\u7576\u591a\u500b\u9032\u7a0b\u540c\u6642\u5617\u8a66\u7372\u53d6\u540c\u4e00\u628a\u9396\u6642\uff0c\u53ea\u6709\u4e00\u500b\u9032\u7a0b\u80fd\u6210\u529f\uff0c\u5176\u4ed6\u9032\u7a0b\u5247\u6703\u7372\u53d6\u5931\u6557\u3002<\/li>\n<li><strong>\u9396\u7684\u904e\u671f\uff1a<\/strong>\u5982\u679c\u9396\u8a2d\u7f6e\u4e86\u904e\u671f\u6642\u9593\uff0c\u4e14\u5728\u904e\u671f\u4e4b\u524d\u672a\u80fd\u91cb\u653e\u9396\uff0c\u5247\u5176\u4ed6\u9032\u7a0b\u5728\u5617\u8a66\u7372\u53d6\u9396\u6642\u6703\u5931\u6557\u3002<\/li>\n<li><strong>\u7db2\u7d61\u5ef6\u9072\uff1a<\/strong>\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u7db2\u7d61\u5ef6\u9072\u53ef\u80fd\u5c0e\u81f4\u9396\u7372\u53d6\u7684\u8acb\u6c42\u672a\u80fd\u53ca\u6642\u5230\u9054Redis\u670d\u52d9\u5668\uff0c\u5f9e\u800c\u5c0e\u81f4\u7372\u53d6\u5931\u6557\u3002<\/li>\n<li><strong>\u932f\u8aa4\u7684\u9396\u7ba1\u7406\u908f\u8f2f\uff1a<\/strong>\u5982\u679c\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u908f\u8f2f\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9396\u7372\u53d6\u5931\u6557\u7684\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-KNMxTvqDjY\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<p>\u70ba\u4e86\u6709\u6548\u89e3\u6c7aRedis\u9396\u7372\u53d6\u5931\u6557\u7684\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e5%a2%9e%e5%8a%a0%e9%87%8d%e8%a9%a6%e6%a9%9f%e5%88%b6-KNMxTvqDjY\">1. \u589e\u52a0\u91cd\u8a66\u6a5f\u5236<\/h3>\n<p>\u5728\u9396\u7372\u53d6\u5931\u6557\u6642\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u91cd\u8a66\u6a5f\u5236\uff0c\u901a\u904e\u4e00\u5b9a\u7684\u5ef6\u9072\u5f8c\u518d\u6b21\u5617\u8a66\u7372\u53d6\u9396\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u91cd\u8a66\u908f\u8f2f\u793a\u4f8b\uff1a<\/p>\n<pre><code>\ndef acquire_lock(lock_key, unique_lock_value, retries=5, delay=0.1):\n    for _ in range(retries):\n        if redis.setnx(lock_key, unique_lock_value):\n            return True\n        time.sleep(delay)\n    return False\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e9%8e%96%e7%9a%84%e9%81%8e%e6%9c%9f%e6%99%82%e9%96%93-KNMxTvqDjY\">2. \u4f7f\u7528\u9396\u7684\u904e\u671f\u6642\u9593<\/h3>\n<p>\u70ba\u4e86\u9632\u6b62\u6b7b\u9396\uff0c\u53ef\u4ee5\u5728\u8a2d\u7f6e\u9396\u6642\u540c\u6642\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u3002\u9019\u6a23\u5373\u4f7f\u9396\u7684\u64c1\u6709\u8005\u5d29\u6f70\uff0c\u9396\u4e5f\u6703\u5728\u904e\u671f\u5f8c\u81ea\u52d5\u91cb\u653e\u3002<\/p>\n<pre><code>SET lock_key unique_lock_value EX 10 NX\n<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8redlock%e7%ae%97%e6%b3%95-KNMxTvqDjY\">3. \u4f7f\u7528Redlock\u7b97\u6cd5<\/h3>\n<p>Redlock\u662f\u4e00\u7a2e\u5206\u4f48\u5f0f\u9396\u7b97\u6cd5\uff0c\u901a\u904e\u5728\u591a\u500bRedis\u5be6\u4f8b\u4e0a\u7372\u53d6\u9396\u4f86\u63d0\u9ad8\u9396\u7684\u53ef\u9760\u6027\u3002\u9019\u7a2e\u65b9\u6cd5\u80fd\u5920\u6709\u6548\u6e1b\u5c11\u9396\u7372\u53d6\u5931\u6557\u7684\u6982\u7387\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KNMxTvqDjY\">\u7e3d\u7d50<\/h2>\n<p>Redis\u9396\u7372\u53d6\u5931\u6557\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u4e86\u89e3\u5176\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u589e\u52a0\u91cd\u8a66\u6a5f\u5236\u3001\u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\u4ee5\u53ca\u4f7f\u7528Redlock\u7b97\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u964d\u4f4e\u9396\u7372\u53d6\u5931\u6557\u7684\u98a8\u96aa\u3002\u5728\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u6642\uff0c\u78ba\u4fdd\u5176\u652f\u6301\u9ad8\u6548\u7684Redis\u914d\u7f6e\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8b66\u60d5Redis\u9396\u7372\u53d6\u5931\u6557\uff0c\u4e86\u89e3\u5176\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u6027\u8207\u6578\u64da\u4e00\u81f4\u6027\uff0c\u907f\u514d\u6f5b\u5728\u98a8\u96aa\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-164541","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164541","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=164541"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164541\/revisions"}],"predecessor-version":[{"id":164542,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/164541\/revisions\/164542"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=164541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=164541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=164541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}