{"id":132973,"date":"2024-10-30T22:29:21","date_gmt":"2024-10-30T14:29:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/132973\/"},"modified":"2024-10-30T22:29:21","modified_gmt":"2024-10-30T14:29:21","slug":"redis%e6%b6%88%e6%81%af%e9%9a%8a%e5%88%97%e4%b8%ad%e5%af%a6%e7%8f%be%e5%8a%a0%e9%8e%96%e8%a9%b3%e8%a7%a3%ef%bc%88redis%e6%b6%88%e6%81%af%e9%9a%8a%e5%88%97%e5%8a%a0%e9%8e%96%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/132973\/","title":{"rendered":"Redis\u6d88\u606f\u968a\u5217\u4e2d\u5be6\u73fe\u52a0\u9396\u8a73\u89e3\uff08redis\u6d88\u606f\u968a\u5217\u52a0\u9396\uff09"},"content":{"rendered":"<h1 id=\"redis%e6%b6%88%e6%81%af%e9%9a%8a%e5%88%97%e4%b8%ad%e5%af%a6%e7%8f%be%e5%8a%a0%e9%8e%96%e8%a9%b3%e8%a7%a3%ef%bc%88redis%e6%b6%88%e6%81%af%e9%9a%8a%e5%88%97%e5%8a%a0%e9%8e%96%ef%bc%89-FDTccIPmWU\">Redis\u6d88\u606f\u968a\u5217\u4e2d\u5be6\u73fe\u52a0\u9396\u8a73\u89e3\uff08redis\u6d88\u606f\u968a\u5217\u52a0\u9396\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\uff0c\u6d88\u606f\u968a\u5217\u88ab\u5ee3\u6cdb\u61c9\u7528\u65bc\u89e3\u8026\u7cfb\u7d71\u7d44\u4ef6\u3001\u63d0\u9ad8\u7cfb\u7d71\u7684\u53ef\u64f4\u5c55\u6027\u548c\u53ef\u9760\u6027\u3002Redis\u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u5e38\u88ab\u7528\u4f5c\u6d88\u606f\u968a\u5217\u7684\u5be6\u73fe\u3002\u7136\u800c\uff0c\u5728\u591a\u500b\u6d88\u8cbb\u8005\u540c\u6642\u8655\u7406\u6d88\u606f\u7684\u60c5\u6cc1\u4e0b\uff0c\u5982\u4f55\u6709\u6548\u5730\u5be6\u73fe\u52a0\u9396\u4ee5\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\uff0c\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%8a%a0%e9%8e%96-FDTccIPmWU\">\u70ba\u4ec0\u9ebc\u9700\u8981\u52a0\u9396<\/h2>\n<p>\u5728\u4f7f\u7528Redis\u4f5c\u70ba\u6d88\u606f\u968a\u5217\u6642\uff0c\u901a\u5e38\u6703\u6709\u591a\u500b\u6d88\u8cbb\u8005\u540c\u6642\u5f9e\u968a\u5217\u4e2d\u53d6\u51fa\u6d88\u606f\u9032\u884c\u8655\u7406\u3002\u5982\u679c\u4e0d\u52a0\u9396\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u4ee5\u4e0b\u554f\u984c\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u7af6\u722d\uff1a<\/strong>\u591a\u500b\u6d88\u8cbb\u8005\u540c\u6642\u8655\u7406\u540c\u4e00\u689d\u6d88\u606f\uff0c\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li><strong>\u91cd\u8907\u8655\u7406\uff1a<\/strong>\u5982\u679c\u4e00\u500b\u6d88\u8cbb\u8005\u5728\u8655\u7406\u6d88\u606f\u6642\u5d29\u6f70\uff0c\u5176\u4ed6\u6d88\u8cbb\u8005\u53ef\u80fd\u6703\u91cd\u8907\u8655\u7406\u8a72\u6d88\u606f\u3002<\/li>\n<li><strong>\u6d88\u606f\u4e1f\u5931\uff1a<\/strong>\u5728\u6d88\u606f\u8655\u7406\u904e\u7a0b\u4e2d\uff0c\u5982\u679c\u6c92\u6709\u9069\u7576\u7684\u9396\u6a5f\u5236\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6d88\u606f\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"redis%e5%8a%a0%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86-FDTccIPmWU\">Redis\u52a0\u9396\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u52a0\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u5176\u4e2d\u6700\u5e38\u898b\u7684\u662f\u4f7f\u7528SETNX\u547d\u4ee4\u3002SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u8a2d\u7f6e\u4e00\u500b\u9375\u7684\u503c\uff0c\u53ea\u6709\u7576\u8a72\u9375\u4e0d\u5b58\u5728\u6642\u624d\u6703\u6210\u529f\u3002\u9019\u4e00\u7279\u6027\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e7%9a%84%e5%8a%a0%e9%8e%96%e6%b5%81%e7%a8%8b-FDTccIPmWU\">\u57fa\u672c\u7684\u52a0\u9396\u6d41\u7a0b<\/h3>\n<pre><code>\n1. \u6d88\u8cbb\u8005\u5728\u8655\u7406\u6d88\u606f\u4e4b\u524d\uff0c\u5617\u8a66\u4f7f\u7528SETNX\u547d\u4ee4\u8a2d\u7f6e\u4e00\u500b\u9396\u9375\u3002\n2. \u5982\u679cSETNX\u6210\u529f\uff0c\u5247\u7372\u5f97\u9396\uff0c\u53ef\u4ee5\u5b89\u5168\u5730\u8655\u7406\u6d88\u606f\u3002\n3. \u8655\u7406\u5b8c\u6210\u5f8c\uff0c\u522a\u9664\u9396\u9375\u3002\n4. \u5982\u679cSETNX\u5931\u6557\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u6d88\u8cbb\u8005\u7372\u5f97\uff0c\u7576\u524d\u6d88\u8cbb\u8005\u9700\u8981\u7b49\u5f85\u6216\u91cd\u8a66\u3002\n<\/code><\/pre>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-FDTccIPmWU\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528Python\u548cRedis\u7684\u7c21\u55ae\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5be6\u73fe\u52a0\u9396\uff1a<\/p>\n<pre><code>\nimport redis\nimport time\n\n# \u9023\u63a5\u5230Redis\nr = redis.Redis(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(0.001)  # \u7b49\u5f85\u4e00\u6bb5\u6642\u9593\u518d\u91cd\u8a66\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\u793a\u4f8b\nlock_name = \"my_lock\"\nidentifier = acquire_lock(lock_name)\nif identifier:\n    try:\n        # \u8655\u7406\u6d88\u606f\u7684\u908f\u8f2f\n        pass\n    finally:\n        release_lock(lock_name, identifier)\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-FDTccIPmWU\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u5be6\u73feRedis\u52a0\u9396\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u9396\u7684\u904e\u671f\u6642\u9593\uff1a<\/strong>\u8a2d\u7f6e\u5408\u7406\u7684\u9396\u904e\u671f\u6642\u9593\uff0c\u4ee5\u9632\u6b62\u6b7b\u9396\u60c5\u6cc1\u7684\u767c\u751f\u3002<\/li>\n<li><strong>\u9396\u7684\u552f\u4e00\u6027\uff1a<\/strong>\u4f7f\u7528\u552f\u4e00\u6a19\u8b58\u7b26\u4f86\u5340\u5206\u4e0d\u540c\u6d88\u8cbb\u8005\u7684\u9396\uff0c\u907f\u514d\u8aa4\u522a\u9664\u3002<\/li>\n<li><strong>\u91cd\u8a66\u6a5f\u5236\uff1a<\/strong>\u5728\u7372\u53d6\u9396\u5931\u6557\u6642\uff0c\u61c9\u8a2d\u7f6e\u91cd\u8a66\u6a5f\u5236\uff0c\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FDTccIPmWU\">\u7e3d\u7d50<\/h2>\n<p>\u5728Redis\u6d88\u606f\u968a\u5217\u4e2d\u5be6\u73fe\u52a0\u9396\u662f\u4e00\u500b\u91cd\u8981\u7684\u6280\u8853\u6311\u6230\uff0c\u901a\u904e\u5408\u7406\u7684\u9396\u6a5f\u5236\u53ef\u4ee5\u6709\u6548\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u554f\u984c\u3002\u4f7f\u7528SETNX\u547d\u4ee4\u53ef\u4ee5\u7c21\u55ae\u5730\u5be6\u73fe\u5206\u4f48\u5f0f\u9396\uff0c\u4e26\u901a\u904e\u552f\u4e00\u6a19\u8b58\u7b26\u4f86\u78ba\u4fdd\u9396\u7684\u6b63\u78ba\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u9ad8\u53ef\u9760\u6027\u7684\u7cfb\u7d71\uff0c\u9078\u64c7\u5408\u9069\u7684\u52a0\u9396\u7b56\u7565\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\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\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728Redis\u6d88\u606f\u968a\u5217\u4e2d\u5be6\u73fe\u52a0\u9396\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\uff0c\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u8207\u53ef\u9760\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-132973","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/132973","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=132973"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/132973\/revisions"}],"predecessor-version":[{"id":132974,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/132973\/revisions\/132974"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=132973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=132973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=132973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}