{"id":134837,"date":"2024-10-31T04:17:19","date_gmt":"2024-10-30T20:17:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/134837\/"},"modified":"2024-10-31T04:17:19","modified_gmt":"2024-10-30T20:17:19","slug":"redis%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96%e9%87%9d%e5%b0%8d%e6%80%a7%e7%9a%84%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86%ef%bc%88redis%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/134837\/","title":{"rendered":"Redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u91dd\u5c0d\u6027\u7684\u6578\u64da\u8655\u7406\uff08redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\uff09"},"content":{"rendered":"<h1 id=\"redis%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96%e9%87%9d%e5%b0%8d%e6%80%a7%e7%9a%84%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86-iZwaOxEONU\">Redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u91dd\u5c0d\u6027\u7684\u6578\u64da\u8655\u7406<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u4e00\u81f4\u6027\u548c\u4e26\u767c\u63a7\u5236\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6a5f\u5236\u4f86\u8655\u7406\u9019\u4e9b\u554f\u984c\u3002\u5176\u4e2d\uff0c\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u9032\u884c\u6578\u64da\u8655\u7406\u6642\uff0c\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afredis%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96%ef%bc%9f-iZwaOxEONU\">\u4ec0\u9ebc\u662fRedis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\uff1f<\/h2>\n<p>\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u662f\u6307\u5728Redis\u4e2d\u4f7f\u7528\u7279\u5b9a\u7684\u9375\u4f86\u63a7\u5236\u5c0d\u8cc7\u6e90\u7684\u8a2a\u554f\u3002\u9019\u7a2e\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u78ba\u4fdd\u5728\u540c\u4e00\u6642\u9593\u5167\uff0c\u53ea\u6709\u4e00\u500b\u5ba2\u6236\u7aef\u53ef\u4ee5\u5c0d\u7279\u5b9a\u7684\u6578\u64da\u9032\u884c\u64cd\u4f5c\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u4fee\u6539\u540c\u4e00\u6578\u64da\uff0c\u5f9e\u800c\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e5%af%a6%e7%8f%be%e5%8e%9f%e7%90%86-iZwaOxEONU\">\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u7684\u5be6\u73fe\u539f\u7406<\/h2>\n<p>Redis\u7684\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u901a\u5e38\u57fa\u65bcSETNX\u547d\u4ee4\uff08Set if Not eXists\uff09\u4f86\u5be6\u73fe\u3002\u9019\u500b\u547d\u4ee4\u53ef\u4ee5\u5728\u9375\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u8a2d\u7f6e\u9375\u7684\u503c\uff0c\u5f9e\u800c\u9054\u5230\u9396\u5b9a\u7684\u6548\u679c\u3002\u4ee5\u4e0b\u662f\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u7684\u57fa\u672c\u5be6\u73fe\u6b65\u9a5f\uff1a<\/p>\n<pre><code>1. \u5ba2\u6236\u7aef\u5617\u8a66\u4f7f\u7528SETNX\u547d\u4ee4\u8a2d\u7f6e\u4e00\u500b\u9396\u9375\u3002\n2. \u5982\u679cSETNX\u8fd4\u56de1\uff0c\u5247\u8868\u793a\u9396\u5b9a\u6210\u529f\uff0c\u5ba2\u6236\u7aef\u53ef\u4ee5\u9032\u884c\u6578\u64da\u8655\u7406\u3002\n3. \u5ba2\u6236\u7aef\u5728\u5b8c\u6210\u6578\u64da\u8655\u7406\u5f8c\uff0c\u4f7f\u7528DEL\u547d\u4ee4\u522a\u9664\u9396\u9375\uff0c\u91cb\u653e\u9396\u3002\n4. \u5982\u679cSETNX\u8fd4\u56de0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u6301\u6709\uff0c\u5ba2\u6236\u7aef\u9700\u8981\u7b49\u5f85\u6216\u91cd\u8a66\u3002<\/code><\/pre>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-iZwaOxEONU\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u7684\u7c21\u55ae\u793a\u4f8b\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_lock(lock_name, acquire_time=10):\n    identifier = str(uuid.uuid4())\n    end = time.time() + acquire_time\n    while time.time() &lt; end:\n        if r.set(lock_name, identifier, nx=True, ex=acquire_time):\n            return identifier\n        time.sleep(0.01)\n    return False\n\ndef release_lock(lock_name, identifier):\n    pipe = r.pipeline(True)\n    while True:\n        try:\n            pipe.watch(lock_name)\n            if pipe.get(lock_name) == identifier:\n                pipe.multi()\n                pipe.delete(lock_name)\n                pipe.execute()\n                return True\n            pipe.unwatch()\n            break\n        except redis.WatchError:\n            pass\n    return False\n\n# \u4f7f\u7528\u9396\nlock_name = &quot;my_lock&quot;\nidentifier = acquire_lock(lock_name)\nif identifier:\n    try:\n        # \u57f7\u884c\u6578\u64da\u8655\u7406\n        print(&quot;Processing data...&quot;)\n    finally:\n        release_lock(lock_name, identifier)\nelse:\n    print(&quot;Could not acquire lock, please try again later.&quot;)<\/code><\/pre>\n<h2 id=\"%e8%87%aa%e5%ae%9a%e7%be%a9%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e5%84%aa%e5%8b%a2-iZwaOxEONU\">\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u7c21\u55ae\u6613\u7528\uff1a<\/strong>\u4f7f\u7528Redis\u7684\u57fa\u672c\u547d\u4ee4\u5373\u53ef\u5be6\u73fe\uff0c\u7121\u9700\u984d\u5916\u7684\u5eab\u6216\u6846\u67b6\u3002<\/li>\n<li><strong>\u9ad8\u6548\u6027\u80fd\uff1a<\/strong>Redis\u4f5c\u70ba\u5167\u5b58\u6578\u64da\u5eab\uff0c\u64cd\u4f5c\u901f\u5ea6\u5feb\uff0c\u80fd\u5920\u6eff\u8db3\u9ad8\u4e26\u767c\u7684\u9700\u6c42\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u53ef\u4ee5\u6839\u64da\u696d\u52d9\u9700\u6c42\u81ea\u5b9a\u7fa9\u9396\u7684\u904e\u671f\u6642\u9593\u548c\u91cd\u8a66\u908f\u8f2f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-iZwaOxEONU\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u9396\u7684\u904e\u671f\u6642\u9593\u5408\u7406\uff0c\u907f\u514d\u56e0\u70ba\u9396\u672a\u91cb\u653e\u800c\u5c0e\u81f4\u7684\u6b7b\u9396\u60c5\u6cc1\u3002<\/li>\n<li>\u5728\u91cb\u653e\u9396\u6642\uff0c\u5fc5\u9808\u78ba\u8a8d\u7576\u524d\u6301\u6709\u9396\u7684\u5ba2\u6236\u7aef\u662f\u6b63\u78ba\u7684\uff0c\u907f\u514d\u8aa4\u522a\u9664\u3002<\/li>\n<li>\u8003\u616e\u5230\u7db2\u7d61\u5ef6\u9072\u548c\u6545\u969c\u60c5\u6cc1\uff0c\u61c9\u8a72\u8a2d\u8a08\u5408\u7406\u7684\u91cd\u8a66\u6a5f\u5236\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iZwaOxEONU\">\u7e3d\u7d50<\/h2>\n<p>Redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u8655\u7406\u6a5f\u5236\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u5be6\u73fe\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u5834\u666f\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Redis\u81ea\u5b9a\u7fa9\u4e8b\u52d9\u9396\u7684\u61c9\u7528\uff0c\u5be6\u73fe\u91dd\u5c0d\u6027\u7684\u6578\u64da\u8655\u7406\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u6578\u64da\u4e00\u81f4\u6027\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-134837","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134837","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=134837"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134837\/revisions"}],"predecessor-version":[{"id":134838,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/134837\/revisions\/134838"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=134837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=134837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=134837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}