{"id":159895,"date":"2024-11-03T18:33:20","date_gmt":"2024-11-03T10:33:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/159895\/"},"modified":"2024-11-03T18:33:22","modified_gmt":"2024-11-03T10:33:22","slug":"redis-%e8%b7%b3%e8%ba%8d%e8%a1%a8%e4%bb%8b%e7%b4%b9%ef%bc%9a%e7%b4%85%e8%89%b2%e4%b9%8b%e7%9f%b3%e8%b7%b3%e8%ba%8d%e8%a1%a8%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/159895\/","title":{"rendered":"REDIS \u8df3\u8e8d\u8868\u4ecb\u7d39\uff1a\u7d05\u8272\u4e4b\u77f3\u8df3\u8e8d\u8868\u7c21\u4ecb"},"content":{"rendered":"

REDIS \u8df3\u8e8d\u8868\u4ecb\u7d39\uff1a\u7d05\u8272\u4e4b\u77f3\u8df3\u8e8d\u8868\u7c21\u4ecb<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u8655\u7406\u548c\u5b58\u5132\u9818\u57df\uff0cRedis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5df2\u7d93\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u3002Redis \u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u5176\u4e2d\u8df3\u8e8d\u8868\uff08Skip List\uff09\u662f\u4e00\u500b\u76f8\u5c0d\u8f03\u5c11\u88ab\u63d0\u53ca\u4f46\u537b\u975e\u5e38\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Redis \u4e2d\u7684\u8df3\u8e8d\u8868\uff0c\u4e26\u4ecb\u7d39\u5176\u57fa\u672c\u6982\u5ff5\u3001\u7279\u6027\u53ca\u61c9\u7528\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u8df3\u8e8d\u8868\uff1f<\/h2>\n

\u8df3\u8e8d\u8868\u662f\u4e00\u7a2e\u96a8\u6a5f\u5316\u7684\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u63d0\u4f9b\u9ad8\u6548\u7684\u67e5\u627e\u3001\u63d2\u5165\u548c\u522a\u9664\u64cd\u4f5c\u3002\u5b83\u7684\u57fa\u672c\u601d\u60f3\u662f\u5c07\u4e00\u500b\u6709\u5e8f\u7684\u93c8\u8868\u5206\u5c64\uff0c\u6bcf\u4e00\u5c64\u90fd\u662f\u4e00\u500b\u5b50\u96c6\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u67e5\u627e\u6642\u8df3\u904e\u591a\u500b\u5143\u7d20\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u627e\u6548\u7387\u3002\u8df3\u8e8d\u8868\u7684\u6642\u9593\u8907\u96dc\u5ea6\u70ba O(log n)\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u975e\u5e38\u9ad8\u6548\u3002<\/p>\n

\u8df3\u8e8d\u8868\u7684\u7d50\u69cb<\/h2>\n

\u8df3\u8e8d\u8868\u7531\u591a\u500b\u5c64\u7d1a\u7d44\u6210\uff0c\u6bcf\u4e00\u5c64\u90fd\u662f\u4e00\u500b\u6709\u5e8f\u7684\u93c8\u8868\u3002\u6700\u5e95\u5c64\u7684\u93c8\u8868\u5305\u542b\u6240\u6709\u7684\u5143\u7d20\uff0c\u800c\u4e0a\u5c64\u7684\u93c8\u8868\u5247\u662f\u5e95\u5c64\u93c8\u8868\u7684\u5b50\u96c6\u3002\u6bcf\u500b\u5143\u7d20\u5728\u4e0d\u540c\u5c64\u7d1a\u7684\u51fa\u73fe\u662f\u96a8\u6a5f\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u8b49\u67e5\u627e\u7684\u6548\u7387\u3002\u4ee5\u4e0b\u662f\u8df3\u8e8d\u8868\u7684\u57fa\u672c\u7d50\u69cb\u793a\u4f8b\uff1a<\/p>\n

\nclass Node {\n    int value;\n    Node[] forward; \/\/ \u6307\u5411\u4e0b\u4e00\u5c64\u7684\u6307\u91dd\n    Node(int level, int value) {\n        this.value = value;\n        this.forward = new Node[level + 1];\n    }\n}\n<\/code><\/pre>\n
\u8df3\u8e8d\u8868\u7684\u64cd\u4f5c<\/h2>\n
\u67e5\u627e\u64cd\u4f5c<\/h3>\n
\u67e5\u627e\u64cd\u4f5c\u5f9e\u6700\u9ad8\u5c64\u958b\u59cb\uff0c\u9010\u5c64\u5411\u4e0b\u9032\u884c\u3002\u5982\u679c\u7576\u524d\u5c64\u7684\u4e0b\u4e00\u500b\u7bc0\u9ede\u7684\u503c\u5c0f\u65bc\u76ee\u6a19\u503c\uff0c\u5247\u5411\u524d\u79fb\u52d5\uff1b\u5982\u679c\u5927\u65bc\u76ee\u6a19\u503c\uff0c\u5247\u5411\u4e0b\u79fb\u52d5\u5230\u4e0b\u4e00\u5c64\u3002\u9019\u6a23\u7684\u904e\u7a0b\u53ef\u4ee5\u5927\u5927\u6e1b\u5c11\u67e5\u627e\u7684\u6642\u9593\u3002<\/p>\n
\npublic Node find(int value) {\n    Node current = header; \/\/ header \u662f\u8df3\u8e8d\u8868\u7684\u982d\u7bc0\u9ede\n    for (int i = maxLevel; i >= 0; i--) {\n        while (current.forward[i] != null && current.forward[i].value < value) {\n            current = current.forward[i];\n        }\n    }\n    current = current.forward[0];\n    return (current != null && current.value == value) ? current : null;\n}\n<\/code><\/pre>\n
\u63d2\u5165\u64cd\u4f5c<\/h3>\n
\u63d2\u5165\u64cd\u4f5c\u9996\u5148\u9700\u8981\u751f\u6210\u4e00\u500b\u96a8\u6a5f\u5c64\u7d1a\uff0c\u7136\u5f8c\u5c07\u65b0\u7bc0\u9ede\u63d2\u5165\u5230\u76f8\u61c9\u7684\u5c64\u7d1a\u4e2d\u3002\u9019\u500b\u904e\u7a0b\u9700\u8981\u66f4\u65b0\u591a\u500b\u6307\u91dd\uff0c\u4ee5\u4fdd\u6301\u8df3\u8e8d\u8868\u7684\u6709\u5e8f\u6027\u3002<\/p>\n
\npublic void insert(int value) {\n    Node[] update = new Node[maxLevel + 1];\n    Node current = header;\n    for (int i = maxLevel; i >= 0; i--) {\n        while (current.forward[i] != null && current.forward[i].value < value) {\n            current = current.forward[i];\n        }\n        update[i] = current;\n    }\n    current = current.forward[0];\n    if (current == null || current.value != value) {\n        int level = randomLevel();\n        Node newNode = new Node(level, value);\n        for (int i = 0; i <= level; i++) {\n            newNode.forward[i] = update[i].forward[i];\n            update[i].forward[i] = newNode;\n        }\n    }\n}\n<\/code><\/pre>\n
Redis \u4e2d\u7684\u8df3\u8e8d\u8868<\/h2>\n
\u5728 Redis \u4e2d\uff0c\u8df3\u8e8d\u8868\u88ab\u7528\u4f5c\u5176\u5167\u90e8\u6578\u64da\u7d50\u69cb\u4e4b\u4e00\uff0c\u7279\u5225\u662f\u5728\u5be6\u73fe\u6709\u5e8f\u96c6\u5408\uff08Sorted Set\uff09\u6642\u3002Redis \u7684\u6709\u5e8f\u96c6\u5408\u5141\u8a31\u7528\u6236\u4ee5\u5206\u6578\uff08score\uff09\u4f86\u6392\u5e8f\u5143\u7d20\uff0c\u4e26\u63d0\u4f9b\u9ad8\u6548\u7684\u67e5\u627e\u548c\u7bc4\u570d\u67e5\u8a62\u529f\u80fd\u3002\u8df3\u8e8d\u8868\u7684\u4f7f\u7528\u4f7f\u5f97 Redis \u80fd\u5920\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u4fdd\u6301\u9ad8\u6548\u7684\u6027\u80fd\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u8df3\u8e8d\u8868\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u6578\u64da\u7d50\u69cb\uff0c\u70ba Redis \u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\uff0c\u4f7f\u5176\u80fd\u5920\u5728\u5404\u7a2e\u61c9\u7528\u5834\u666f\u4e2d\u4fdd\u6301\u512a\u7570\u7684\u6027\u80fd\u3002\u7121\u8ad6\u662f\u5728\u67e5\u627e\u3001\u63d2\u5165\u9084\u662f\u522a\u9664\u64cd\u4f5c\u4e2d\uff0c\u8df3\u8e8d\u8868\u90fd\u5c55\u73fe\u4e86\u5176\u9ad8\u6548\u6027\u548c\u9748\u6d3b\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u6578\u64da\u5b58\u5132\u548c\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u7d50\u69cb\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f \u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3REDIS\u8df3\u8e8d\u8868\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u63a2\u7d22\u7d05\u8272\u4e4b\u77f3\u8df3\u8e8d\u8868\u7684\u7279\u6027\u8207\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u5b58\u53d6\u6548\u7387\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-159895","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159895","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=159895"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159895\/revisions"}],"predecessor-version":[{"id":159896,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/159895\/revisions\/159896"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=159895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=159895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=159895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}