{"id":125067,"date":"2024-10-25T19:32:21","date_gmt":"2024-10-25T11:32:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/125067\/"},"modified":"2024-10-25T19:32:22","modified_gmt":"2024-10-25T11:32:22","slug":"redis-%e8%85%b3%e6%9c%ac%e4%b8%ad%e5%9f%b7%e8%a1%8c%e8%85%b3%e6%9c%ac%e7%9a%84%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/125067\/","title":{"rendered":"Redis \u8173\u672c\u4e2d\u57f7\u884c\u8173\u672c\u7684\u6280\u5de7"},"content":{"rendered":"

Redis \u8173\u672c\u4e2d\u57f7\u884c\u8173\u672c\u7684\u6280\u5de7<\/h1>\n

Redis \u662f\u4e00\u500b\u9ad8\u6548\u80fd\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u6578\u64da\u5b58\u5132\u7b49\u5834\u666f\u3002\u5176\u652f\u6301\u7684 Lua \u8173\u672c\u529f\u80fd\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u5728\u4f3a\u670d\u5668\u7aef\u57f7\u884c\u8907\u96dc\u7684\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u548c\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728 Redis \u8173\u672c\u4e2d\u57f7\u884c\u8173\u672c\u7684\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u5229\u7528\u9019\u4e00\u529f\u80fd\u3002<\/p>\n

\u70ba\u4ec0\u9ebc\u4f7f\u7528 Lua \u8173\u672c<\/h2>\n

\u4f7f\u7528 Lua \u8173\u672c\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u5b83\u80fd\u5920\u5c07\u591a\u500b Redis \u547d\u4ee4\u6253\u5305\u6210\u4e00\u500b\u539f\u5b50\u64cd\u4f5c\uff0c\u9019\u610f\u5473\u8457\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u4e0d\u6703\u88ab\u5176\u4ed6\u547d\u4ee4\u6253\u65b7\u3002\u9019\u5c0d\u65bc\u9700\u8981\u4fdd\u6301\u6578\u64da\u4e00\u81f4\u6027\u7684\u64cd\u4f5c\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n

\u57fa\u672c\u7684 Lua \u8173\u672c\u8a9e\u6cd5<\/h2>\n

\u5728 Redis \u4e2d\u57f7\u884c Lua \u8173\u672c\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

eval script numkeys key1 key2 ... arg1 arg2 ...<\/code><\/pre>\n
\u5176\u4e2d\uff0cscript<\/code> \u662f Lua \u8173\u672c\u7684\u5167\u5bb9\uff0cnumkeys<\/code> \u662f\u9375\u7684\u6578\u91cf\uff0ckey1, key2, ...<\/code> \u662f\u8981\u64cd\u4f5c\u7684\u9375\uff0carg1, arg2, ...<\/code> \u662f\u50b3\u905e\u7d66\u8173\u672c\u7684\u53c3\u6578\u3002<\/p>\n
\u793a\u4f8b\uff1a\u7c21\u55ae\u7684\u52a0\u6cd5\u64cd\u4f5c<\/h3>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 Lua \u8173\u672c\u793a\u4f8b\uff0c\u8a72\u8173\u672c\u5c07\u5169\u500b\u9375\u7684\u503c\u76f8\u52a0\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5230\u53e6\u4e00\u500b\u9375\u4e2d\uff1a<\/p>\n
local value1 = redis.call('GET', KEYS[1])\nlocal value2 = redis.call('GET', KEYS[2])\nlocal sum = tonumber(value1) + tonumber(value2)\nredis.call('SET', KEYS[3], sum)\nreturn sum<\/code><\/pre>\n
\u57f7\u884c\u8a72\u8173\u672c\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
eval \"local value1 = redis.call('GET', KEYS[1]) local value2 = redis.call('GET', KEYS[2]) local sum = tonumber(value1) + tonumber(value2) redis.call('SET', KEYS[3], sum) return sum\" 3 key1 key2 key3<\/code><\/pre>\n
\u4f7f\u7528 KEYS \u548c ARGV<\/h2>\n
\u5728 Lua \u8173\u672c\u4e2d\uff0cKEYS<\/code> \u548c ARGV<\/code> \u662f\u5169\u500b\u91cd\u8981\u7684\u5168\u5c40\u8b8a\u91cf\u3002KEYS<\/code> \u7528\u65bc\u5b58\u5132\u9375\u540d\uff0c\u800c ARGV<\/code> \u7528\u65bc\u5b58\u5132\u984d\u5916\u7684\u53c3\u6578\u3002\u9019\u4f7f\u5f97\u8173\u672c\u66f4\u52a0\u9748\u6d3b\u548c\u53ef\u91cd\u7528\u3002<\/p>\n
\u793a\u4f8b\uff1a\u4f7f\u7528 ARGV \u53c3\u6578<\/h3>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u8a72\u8173\u672c\u5c07\u4e00\u500b\u9375\u7684\u503c\u589e\u52a0\u6307\u5b9a\u7684\u6578\u91cf\uff1a<\/p>\n
local current_value = redis.call('GET', KEYS[1])\nlocal increment = tonumber(ARGV[1])\nlocal new_value = tonumber(current_value) + increment\nredis.call('SET', KEYS[1], new_value)\nreturn new_value<\/code><\/pre>\n
\u57f7\u884c\u8a72\u8173\u672c\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
eval \"local current_value = redis.call('GET', KEYS[1]) local increment = tonumber(ARGV[1]) local new_value = tonumber(current_value) + increment redis.call('SET', KEYS[1], new_value) return new_value\" 1 key1 10<\/code><\/pre>\n
\u932f\u8aa4\u8655\u7406<\/h2>\n
\u5728\u7de8\u5beb Lua \u8173\u672c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528 error<\/code> \u51fd\u6578\u4f86\u62cb\u51fa\u932f\u8aa4\uff0c\u4e26\u5728\u5ba2\u6236\u7aef\u6355\u7372\u9019\u4e9b\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n
if not value1 then\n    error(\"Key1 does not exist\")\nend<\/code><\/pre>\n
\u6027\u80fd\u8003\u91cf<\/h2>\n
\u96d6\u7136 Lua \u8173\u672c\u80fd\u5920\u63d0\u9ad8\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u4f46\u904e\u65bc\u8907\u96dc\u7684\u8173\u672c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5728\u7de8\u5beb\u8173\u672c\u6642\uff0c\u61c9\u8a72\u76e1\u91cf\u4fdd\u6301\u7c21\u6f54\uff0c\u4e26\u907f\u514d\u5728\u8173\u672c\u4e2d\u9032\u884c\u904e\u591a\u7684\u8a08\u7b97\u6216 I\/O \u64cd\u4f5c\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
Redis \u7684 Lua \u8173\u672c\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5728\u4f3a\u670d\u5668\u7aef\u57f7\u884c\u8907\u96dc\u7684\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u548c\u6578\u64da\u4e00\u81f4\u6027\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528 KEYS<\/code> \u548c ARGV<\/code>\uff0c\u4ee5\u53ca\u6ce8\u610f\u932f\u8aa4\u8655\u7406\u548c\u6027\u80fd\u8003\u91cf\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5145\u5206\u767c\u63ee Redis \u7684\u6f5b\u529b\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc \u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22 Redis \u8173\u672c\u4e2d\u57f7\u884c\u8173\u672c\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6027\u80fd\u8207\u6548\u7387\uff0c\u638c\u63e1\u6700\u4f73\u5be6\u8e10\uff0c\u512a\u5316\u6578\u64da\u8655\u7406\u6d41\u7a0b\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-125067","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125067","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=125067"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125067\/revisions"}],"predecessor-version":[{"id":125068,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/125067\/revisions\/125068"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=125067"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=125067"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=125067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}