{"id":183132,"date":"2024-11-10T02:16:19","date_gmt":"2024-11-09T18:16:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183132\/"},"modified":"2024-11-10T02:16:20","modified_gmt":"2024-11-09T18:16:20","slug":"%e5%af%a6%e7%8f%beredis%e4%b8%adhash%e5%ba%95%e5%b1%a4%e5%af%a6%e7%8f%be%e5%8e%9f%e7%90%86%e6%b7%ba%e6%9e%90%ef%bc%88redis%e7%9a%84hash%e5%ba%95%e5%b1%a4%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183132\/","title":{"rendered":"\u5be6\u73feRedis\u4e2dHash\u5e95\u5c64\u5be6\u73fe\u539f\u7406\u6dfa\u6790\uff08redis\u7684hash\u5e95\u5c64\uff09"},"content":{"rendered":"<h1 id=\"%e5%af%a6%e7%8f%beredis%e4%b8%adhash%e5%ba%95%e5%b1%a4%e5%af%a6%e7%8f%be%e5%8e%9f%e7%90%86%e6%b7%ba%e6%9e%90%ef%bc%88redis%e7%9a%84hash%e5%ba%95%e5%b1%a4%ef%bc%89-OtVchtjrZj\">\u5be6\u73feRedis\u4e2dHash\u5e95\u5c64\u5be6\u73fe\u539f\u7406\u6dfa\u6790\uff08redis\u7684hash\u5e95\u5c64\uff09<\/h1>\n<p>Redis\u662f\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\u4e2d\u3002\u5176\u6578\u64da\u7d50\u69cb\u7684\u591a\u6a23\u6027\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u9748\u6d3b\u5730\u9078\u64c7\u6700\u9069\u5408\u7684\u5b58\u5132\u65b9\u5f0f\u3002\u5728Redis\u4e2d\uff0cHash\u662f\u4e00\u7a2e\u975e\u5e38\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7279\u5225\u9069\u5408\u7528\u65bc\u5b58\u5132\u5c0d\u8c61\u7684\u5c6c\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eRedis\u4e2dHash\u7684\u5e95\u5c64\u5be6\u73fe\u539f\u7406\u3002<\/p>\n<h2 id=\"hash%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-OtVchtjrZj\">Hash\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728Redis\u4e2d\uff0cHash\u662f\u4e00\u7a2e\u9375\u503c\u5c0d\u7684\u96c6\u5408\uff0c\u9069\u5408\u7528\u4f86\u8868\u793a\u5c0d\u8c61\u7684\u5c6c\u6027\u3002\u4f8b\u5982\uff0c\u4e00\u500b\u7528\u6236\u7684\u8cc7\u6599\u53ef\u4ee5\u7528Hash\u4f86\u5b58\u5132\uff0c\u5176\u4e2d\u6bcf\u500b\u5c6c\u6027\uff08\u5982\u59d3\u540d\u3001\u5e74\u9f61\u3001\u96fb\u5b50\u90f5\u4ef6\u7b49\uff09\u90fd\u662f\u4e00\u500b\u9375\u503c\u5c0d\u3002\u9019\u6a23\u7684\u7d50\u69cb\u4e0d\u50c5\u7bc0\u7701\u7a7a\u9593\uff0c\u9084\u80fd\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"hash%e7%9a%84%e5%ba%95%e5%b1%a4%e5%af%a6%e7%8f%be-OtVchtjrZj\">Hash\u7684\u5e95\u5c64\u5be6\u73fe<\/h2>\n<p>Redis\u4e2d\u7684Hash\u5e95\u5c64\u5be6\u73fe\u4e3b\u8981\u4f9d\u8cf4\u65bc\u5169\u7a2e\u6578\u64da\u7d50\u69cb\uff1a\u58d3\u7e2e\u5217\u8868\uff08ziplist\uff09\u548c\u54c8\u5e0c\u8868\uff08hash table\uff09\u3002\u6839\u64daHash\u4e2d\u5143\u7d20\u7684\u6578\u91cf\uff0cRedis\u6703\u81ea\u52d5\u9078\u64c7\u4f7f\u7528\u54ea\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\u3002<\/p>\n<h3 id=\"%e5%a3%93%e7%b8%ae%e5%88%97%e8%a1%a8%ef%bc%88ziplist%ef%bc%89-OtVchtjrZj\">\u58d3\u7e2e\u5217\u8868\uff08ziplist\uff09<\/h3>\n<p>\u7576Hash\u4e2d\u7684\u5143\u7d20\u6578\u91cf\u8f03\u5c11\u6642\uff0cRedis\u6703\u4f7f\u7528\u58d3\u7e2e\u5217\u8868\u4f86\u5b58\u5132\u3002\u58d3\u7e2e\u5217\u8868\u662f\u4e00\u7a2e\u7dca\u6e4a\u7684\u6578\u64da\u7d50\u69cb\uff0c\u80fd\u5920\u6709\u6548\u5730\u7bc0\u7701\u5167\u5b58\u3002\u5b83\u5c07\u9375\u548c\u503c\u9023\u7e8c\u5b58\u5132\u5728\u4e00\u500b\u5167\u5b58\u584a\u4e2d\uff0c\u4e26\u4f7f\u7528\u93c8\u63a5\u4f86\u8868\u793a\u5143\u7d20\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/p>\n<pre><code>\ntypedef struct {\n    unsigned int zlBytes;  \/\/ \u58d3\u7e2e\u5217\u8868\u7684\u7e3d\u5b57\u7bc0\u6578\n    unsigned int zlFree;   \/\/ \u53ef\u7528\u7a7a\u9593\n    unsigned int zlCount;  \/\/ \u5143\u7d20\u6578\u91cf\n    unsigned char zlData[]; \/\/ \u5be6\u969b\u6578\u64da\n} ziplist;\n<\/code><\/pre>\n<p>\u58d3\u7e2e\u5217\u8868\u7684\u512a\u52e2\u5728\u65bc\u5176\u5167\u5b58\u4f7f\u7528\u6548\u7387\u9ad8\uff0c\u4f46\u7576\u5143\u7d20\u6578\u91cf\u8d85\u904e\u4e00\u5b9a\u95be\u503c\u6642\uff0c\u6027\u80fd\u6703\u4e0b\u964d\uff0c\u56e0\u6b64Redis\u6703\u81ea\u52d5\u8f49\u63db\u70ba\u54c8\u5e0c\u8868\u3002<\/p>\n<h3 id=\"%e5%93%88%e5%b8%8c%e8%a1%a8%ef%bc%88hash-table%ef%bc%89-OtVchtjrZj\">\u54c8\u5e0c\u8868\uff08hash table\uff09<\/h3>\n<p>\u7576Hash\u4e2d\u7684\u5143\u7d20\u6578\u91cf\u589e\u9577\u5230\u4e00\u5b9a\u7a0b\u5ea6\u6642\uff0cRedis\u6703\u5c07\u5176\u8f49\u63db\u70ba\u54c8\u5e0c\u8868\u3002\u54c8\u5e0c\u8868\u7531\u4e00\u7d44\u6876\uff08bucket\uff09\u7d44\u6210\uff0c\u6bcf\u500b\u6876\u53ef\u4ee5\u5b58\u5132\u591a\u500b\u9375\u503c\u5c0d\u3002\u9019\u7a2e\u7d50\u69cb\u80fd\u5920\u63d0\u4f9b\u66f4\u5feb\u7684\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u5143\u7d20\u6578\u91cf\u8f03\u591a\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<pre><code>\ntypedef struct {\n    dict *ht[2]; \/\/ \u5169\u500b\u54c8\u5e0c\u8868\uff0c\u652f\u6301\u589e\u91cf\u91cd\u54c8\u5e0c\n    unsigned long rehashidx; \/\/ \u7576\u524d\u91cd\u54c8\u5e0c\u7684\u7d22\u5f15\n} hashTable;\n<\/code><\/pre>\n<p>\u54c8\u5e0c\u8868\u7684\u67e5\u8a62\u6642\u9593\u8907\u96dc\u5ea6\u70baO(1)\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u8868\u73fe\u51fa\u8272\u3002Redis\u4f7f\u7528\u958b\u653e\u5730\u5740\u6cd5\u4f86\u89e3\u6c7a\u54c8\u5e0c\u885d\u7a81\uff0c\u9019\u610f\u5473\u8457\u7576\u5169\u500b\u9375\u7684\u54c8\u5e0c\u503c\u76f8\u540c\u6642\uff0cRedis\u6703\u5c0b\u627e\u4e0b\u4e00\u500b\u53ef\u7528\u7684\u6876\u4f86\u5b58\u5132\u65b0\u7684\u9375\u503c\u5c0d\u3002<\/p>\n<h2 id=\"hash%e7%9a%84%e6%93%8d%e4%bd%9c-OtVchtjrZj\">Hash\u7684\u64cd\u4f5c<\/h2>\n<p>Redis\u63d0\u4f9b\u4e86\u591a\u7a2e\u64cd\u4f5cHash\u7684\u547d\u4ee4\uff0c\u5982HSET\u3001HGET\u3001HDEL\u7b49\u3002\u9019\u4e9b\u547d\u4ee4\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u65b9\u4fbf\u5730\u5c0dHash\u9032\u884c\u589e\u522a\u6539\u67e5\u64cd\u4f5c\u3002<\/p>\n<ul>\n<li><code>HSET key field value<\/code>\uff1a\u8a2d\u7f6eHash\u4e2d\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\u3002<\/li>\n<li><code>HGET key field<\/code>\uff1a\u7372\u53d6Hash\u4e2d\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\u3002<\/li>\n<li><code>HDEL key field<\/code>\uff1a\u522a\u9664Hash\u4e2d\u6307\u5b9a\u5b57\u6bb5\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OtVchtjrZj\">\u7e3d\u7d50<\/h2>\n<p>Redis\u4e2d\u7684Hash\u7d50\u69cb\u901a\u904e\u58d3\u7e2e\u5217\u8868\u548c\u54c8\u5e0c\u8868\u7684\u9748\u6d3b\u904b\u7528\uff0c\u5be6\u73fe\u4e86\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u548c\u67e5\u8a62\u3002\u9019\u4f7f\u5f97Hash\u6210\u70ba\u5b58\u5132\u5c0d\u8c61\u5c6c\u6027\u7684\u7406\u60f3\u9078\u64c7\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5feb\u901f\u8a2a\u554f\u548c\u66f4\u65b0\u7684\u5834\u666f\u4e2d\u3002\u4e86\u89e3Redis Hash\u7684\u5e95\u5c64\u5be6\u73fe\u539f\u7406\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u5229\u7528\u9019\u4e00\u6578\u64da\u7d50\u69cb\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\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\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\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":"<p>\u6df1\u5165\u63a2\u8a0eRedis\u4e2dHash\u7684\u5e95\u5c64\u5be6\u73fe\u539f\u7406\uff0c\u89e3\u6790\u5176\u6578\u64da\u7d50\u69cb\u8207\u6027\u80fd\u512a\u5316\uff0c\u5e6b\u52a9\u7406\u89e3Redis\u7684\u9ad8\u6548\u5b58\u5132\u6a5f\u5236\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-183132","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183132","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=183132"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183132\/revisions"}],"predecessor-version":[{"id":183133,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183132\/revisions\/183133"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}