\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cRedis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u5305\u62ec\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u7b49\u3002\u7136\u800c\uff0c\u96a8\u8457\u591a\u7528\u6236\u74b0\u5883\u7684\u589e\u9577\uff0c\u5982\u4f55\u5b89\u5168\u5730\u9032\u884c\u8b80\u5beb\u64cd\u4f5c\u6210\u70ba\u4e86\u4e00\u500b\u91cd\u8981\u7684\u8ab2\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u70ba\u4f55\u5728 Redis \u7684\u8b80\u5beb\u64cd\u4f5c\u4e2d\u9700\u8981\u52a0\u9396\uff0c\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u5be6\u73fe\u9019\u4e00\u904e\u7a0b\u3002<\/p>\n
\u5728\u591a\u7dda\u7a0b\u6216\u591a\u9032\u7a0b\u7684\u74b0\u5883\u4e2d\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7576\u591a\u500b\u5ba2\u6236\u7aef\u540c\u6642\u5c0d Redis \u9032\u884c\u8b80\u5beb\u64cd\u4f5c\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u4ee5\u4e0b\u554f\u984c\uff1a<\/p>\n
Redis \u63d0\u4f9b\u4e86\u591a\u7a2e\u9396\u7684\u5be6\u73fe\u65b9\u5f0f\uff0c\u6700\u5e38\u898b\u7684\u6709\u4ee5\u4e0b\u5e7e\u7a2e\uff1a<\/p>\n
SETNX\uff08Set if Not eXists\uff09\u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u5be6\u73fe\u7c21\u55ae\u7684\u9396\u3002\u7576\u4e00\u500b\u5ba2\u6236\u7aef\u60f3\u8981\u7372\u53d6\u9396\u6642\uff0c\u53ef\u4ee5\u57f7\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
SETNX lock_key unique_lock_value<\/code><\/pre>\n\u5982\u679c\u8fd4\u56de\u503c\u70ba 1\uff0c\u5247\u8868\u793a\u9396\u7372\u53d6\u6210\u529f\uff1b\u5982\u679c\u8fd4\u56de\u503c\u70ba 0\uff0c\u5247\u8868\u793a\u9396\u5df2\u88ab\u5176\u4ed6\u5ba2\u6236\u7aef\u7372\u53d6\u3002\u70ba\u4e86\u907f\u514d\u6b7b\u9396\uff0c\u5efa\u8b70\u5728\u7372\u53d6\u9396\u5f8c\u8a2d\u7f6e\u4e00\u500b\u904e\u671f\u6642\u9593\uff1a<\/p>\n
EXPIRE lock_key 10<\/code><\/pre>\n2. Redlock \u7b97\u6cd5<\/h3>\n
Redlock \u662f\u7531 Redis \u7684\u5275\u59cb\u4eba Antirez \u63d0\u51fa\u7684\u5206\u4f48\u5f0f\u9396\u7b97\u6cd5\u3002\u5b83\u9069\u7528\u65bc\u591a\u500b Redis \u5be6\u4f8b\u7684\u60c5\u6cc1\uff0c\u80fd\u5920\u4fdd\u8b49\u5728\u5206\u4f48\u5f0f\u74b0\u5883\u4e2d\u7684\u6578\u64da\u4e00\u81f4\u6027\u3002Redlock \u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n
\n- \u5728\u6240\u6709 Redis \u5be6\u4f8b\u4e0a\u7372\u53d6\u9396\u3002<\/li>\n
- \u5982\u679c\u5728\u5927\u591a\u6578\u5be6\u4f8b\u4e0a\u6210\u529f\u7372\u53d6\u9396\uff0c\u5247\u9396\u7372\u53d6\u6210\u529f\u3002<\/li>\n
- \u8a2d\u7f6e\u9396\u7684\u904e\u671f\u6642\u9593\uff0c\u9632\u6b62\u6b7b\u9396\u3002<\/li>\n<\/ol>\n
\u4f7f\u7528\u793a\u4f8b<\/h2>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 SETNX \u5be6\u73fe\u9396\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n
function acquireLock($redis, $lockKey, $lockValue, $expire) {\n if ($redis->setnx($lockKey, $lockValue)) {\n $redis->expire($lockKey, $expire);\n return true;\n }\n return false;\n}\n\nfunction releaseLock($redis, $lockKey, $lockValue) {\n if ($redis->get($lockKey) === $lockValue) {\n $redis->del($lockKey);\n }\n}\n<\/code><\/pre>\n\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c`acquireLock` \u51fd\u6578\u7528\u65bc\u7372\u53d6\u9396\uff0c\u800c `releaseLock` \u51fd\u6578\u7528\u65bc\u91cb\u653e\u9396\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u9032\u884c\u8b80\u5beb\u64cd\u4f5c\u6642\uff0c\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u5f97\u4ee5\u7dad\u8b77\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728 Redis \u7684\u8b80\u5beb\u64cd\u4f5c\u4e2d\uff0c\u52a0\u9396\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u6b65\u9a5f\uff0c\u7279\u5225\u662f\u5728\u591a\u7528\u6236\u74b0\u5883\u4e2d\u3002\u901a\u904e\u4f7f\u7528 SETNX \u6216 Redlock \u7b49\u9396\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\u554f\u984c\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u61c9\u7528\u4e2d\u5be6\u73fe\u9019\u4e9b\u6280\u8853\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc \u9999\u6e2fVPS<\/a> \u7684\u8cc7\u8a0a\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4e86\u89e3Redis\u8b80\u5beb\u64cd\u4f5c\u4e2d\u52a0\u9396\u7684\u91cd\u8981\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\uff0c\u907f\u514d\u7af6\u722d\u689d\u4ef6\u548c\u6578\u64da\u640d\u58de\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-98936","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98936","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=98936"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98936\/revisions"}],"predecessor-version":[{"id":98937,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/98936\/revisions\/98937"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=98936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=98936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=98936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}