{"id":167189,"date":"2024-11-05T23:06:17","date_gmt":"2024-11-05T15:06:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/167189\/"},"modified":"2024-11-05T23:06:18","modified_gmt":"2024-11-05T15:06:18","slug":"%e5%88%a9%e7%94%a8redis%e8%ae%80%e9%8e%96%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88redis%e8%ae%80%e9%8e%96%e6%96%b9%e6%b3%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/167189\/","title":{"rendered":"\u5229\u7528Redis\u8b80\u9396\u7372\u53d6\u6578\u64da\u7684\u65b9\u6cd5\uff08redis\u8b80\u9396\u65b9\u6cd5\uff09"},"content":{"rendered":"<h1 id=\"%e5%88%a9%e7%94%a8redis%e8%ae%80%e9%8e%96%e7%8d%b2%e5%8f%96%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%88redis%e8%ae%80%e9%8e%96%e6%96%b9%e6%b3%95%ef%bc%89-mOPdwpkFHS\">\u5229\u7528Redis\u8b80\u9396\u7372\u53d6\u6578\u64da\u7684\u65b9\u6cd5\uff08redis\u8b80\u9396\u65b9\u6cd5\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u53ef\u7528\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u6a5f\u5236\u4f86\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u5176\u4e2d\uff0c\u8b80\u9396\uff08Read Lock\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u9396\u5b9a\u65b9\u5f0f\uff0c\u7279\u5225\u9069\u7528\u65bc\u9700\u8981\u591a\u500b\u8b80\u53d6\u64cd\u4f5c\u800c\u4e0d\u5f71\u97ff\u5beb\u5165\u64cd\u4f5c\u7684\u5834\u666f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Redis\u4e2d\u5be6\u73fe\u8b80\u9396\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%ae%80%e9%8e%96%ef%bc%9f-mOPdwpkFHS\">\u4ec0\u9ebc\u662f\u8b80\u9396\uff1f<\/h2>\n<p>\u8b80\u9396\u662f\u4e00\u7a2e\u5141\u8a31\u591a\u500b\u8b80\u53d6\u64cd\u4f5c\u540c\u6642\u9032\u884c\u7684\u9396\u5b9a\u6a5f\u5236\u3002\u5728\u8b80\u9396\u88ab\u6301\u6709\u7684\u60c5\u6cc1\u4e0b\uff0c\u5176\u4ed6\u8b80\u53d6\u64cd\u4f5c\u53ef\u4ee5\u7e7c\u7e8c\u57f7\u884c\uff0c\u4f46\u5beb\u5165\u64cd\u4f5c\u5c07\u88ab\u963b\u585e\u3002\u9019\u7a2e\u9396\u5b9a\u65b9\u5f0f\u7279\u5225\u9069\u5408\u65bc\u8b80\u53d6\u983b\u7e41\u800c\u5beb\u5165\u8f03\u5c11\u7684\u5834\u666f\uff0c\u80fd\u5920\u63d0\u9ad8\u7cfb\u7d71\u7684\u4e26\u767c\u6027\u80fd\u3002<\/p>\n<h2 id=\"redis%e4%b8%ad%e7%9a%84%e9%8e%96%e6%a9%9f%e5%88%b6-mOPdwpkFHS\">Redis\u4e2d\u7684\u9396\u6a5f\u5236<\/h2>\n<p>Redis\u672c\u8eab\u4e26\u4e0d\u63d0\u4f9b\u5167\u5efa\u7684\u9396\u6a5f\u5236\uff0c\u4f46\u53ef\u4ee5\u901a\u904e\u4e00\u4e9b\u7b56\u7565\u4f86\u5be6\u73fe\u3002\u6700\u5e38\u898b\u7684\u65b9\u5f0f\u662f\u4f7f\u7528Redis\u7684\u9375\u503c\u5c0d\u4f86\u6a21\u64ec\u9396\u7684\u884c\u70ba\u3002\u4ee5\u4e0b\u662f\u5be6\u73fe\u8b80\u9396\u7684\u4e00\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8setnx%e5%91%bd%e4%bb%a4%e5%af%a6%e7%8f%be%e9%8e%96-mOPdwpkFHS\">\u4f7f\u7528SETNX\u547d\u4ee4\u5be6\u73fe\u9396<\/h3>\n<p>SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u5275\u5efa\u4e00\u500b\u9396\u3002\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u5617\u8a66\u7372\u53d6\u9396\u6642\uff0c\u5b83\u53ef\u4ee5\u4f7f\u7528SETNX\u547d\u4ee4\u4f86\u8a2d\u7f6e\u4e00\u500b\u7279\u5b9a\u7684\u9375\u3002\u5982\u679c\u8a72\u9375\u5df2\u7d93\u5b58\u5728\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u6301\u6709\uff0c\u8a72\u5ba2\u6236\u7aef\u9700\u8981\u7b49\u5f85\u3002<\/p>\n<pre><code>SETNX lock_key 1\n<\/code><\/pre>\n<p>\u5728\u7372\u53d6\u5230\u9396\u5f8c\uff0c\u5ba2\u6236\u7aef\u53ef\u4ee5\u9032\u884c\u8b80\u53d6\u64cd\u4f5c\uff0c\u7136\u5f8c\u5728\u5b8c\u6210\u5f8c\u91cb\u653e\u9396\uff1a<\/p>\n<pre><code>DEL lock_key\n<\/code><\/pre>\n<h3 id=\"%e5%af%a6%e7%8f%be%e8%ae%80%e9%8e%96%e7%9a%84%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-mOPdwpkFHS\">\u5be6\u73fe\u8b80\u9396\u7684\u4ee3\u78bc\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Python\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728Redis\u4e2d\u5be6\u73fe\u8b80\u9396\uff1a<\/p>\n<pre><code>import redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\ndef acquire_read_lock(lock_key):\n    while True:\n        if r.setnx(lock_key, 1):\n            return True\n        time.sleep(0.1)  # \u7b49\u5f85\u4e00\u6bb5\u6642\u9593\u518d\u91cd\u8a66\n\ndef release_read_lock(lock_key):\n    r.delete(lock_key)\n\ndef read_data():\n    lock_key = \"read_lock\"\n    acquire_read_lock(lock_key)\n    try:\n        # \u9032\u884c\u6578\u64da\u8b80\u53d6\u64cd\u4f5c\n        data = r.get(\"data_key\")\n        print(\"\u8b80\u53d6\u6578\u64da:\", data)\n    finally:\n        release_read_lock(lock_key)\n\n# \u8abf\u7528\u8b80\u53d6\u6578\u64da\u7684\u51fd\u6578\nread_data()\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-mOPdwpkFHS\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u8b80\u9396\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u91cb\u653e\uff1a\u5728\u8b80\u53d6\u64cd\u4f5c\u5b8c\u6210\u5f8c\uff0c\u5fc5\u9808\u91cb\u653e\u9396\uff0c\u4ee5\u907f\u514d\u6b7b\u9396\u7684\u60c5\u6cc1\u3002<\/li>\n<li>\u9396\u7684\u8d85\u6642\u8a2d\u7f6e\uff1a\u53ef\u4ee5\u8003\u616e\u70ba\u9396\u8a2d\u7f6e\u8d85\u6642\uff0c\u4ee5\u9632\u6b62\u56e0\u70ba\u67d0\u4e9b\u539f\u56e0\u5c0e\u81f4\u9396\u7121\u6cd5\u91cb\u653e\u3002<\/li>\n<li>\u6027\u80fd\u8003\u91cf\uff1a\u96d6\u7136\u8b80\u9396\u53ef\u4ee5\u63d0\u9ad8\u4e26\u767c\u6027\u80fd\uff0c\u4f46\u904e\u591a\u7684\u9396\u7af6\u722d\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u6b64\u9700\u8981\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mOPdwpkFHS\">\u7e3d\u7d50<\/h2>\n<p>Redis\u7684\u8b80\u9396\u6a5f\u5236\u70ba\u9ad8\u4e26\u767c\u7684\u8b80\u53d6\u64cd\u4f5c\u63d0\u4f9b\u4e86\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u9396\uff0c\u53ef\u4ee5\u5728\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027\u7684\u540c\u6642\uff0c\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8b80\u53d6\u7684\u61c9\u7528\u5834\u666f\uff0cRedis\u7684\u8b80\u9396\u65b9\u6cd5\u7121\u7591\u662f\u4e00\u500b\u503c\u5f97\u8003\u616e\u7684\u9078\u64c7\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u8b80\u9396\u7372\u53d6\u6578\u64da\u7684\u65b9\u6cd5\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u4e26\u767c\u8a2a\u554f\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u8207\u6027\u80fd\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-167189","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167189","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=167189"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167189\/revisions"}],"predecessor-version":[{"id":167190,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/167189\/revisions\/167190"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=167189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=167189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=167189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}