{"id":201400,"date":"2025-05-10T11:20:48","date_gmt":"2025-05-10T03:20:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201400\/"},"modified":"2025-05-10T11:20:48","modified_gmt":"2025-05-10T03:20:48","slug":"redis%e8%af%a6%e7%bb%86%e4%bb%8b%e7%bb%8d%ef%bc%9a5%e7%a7%8d%e5%9f%ba%e6%9c%ac%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201400\/","title":{"rendered":"Redis\u8be6\u7ec6\u4ecb\u7ecd\uff1a5\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u8be6\u7ec6\u4ecb\u7ecd\uff1a5\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929golang\u5b66\u4e60\u7f51\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aRedis\u8be6\u7ec6\u4ecb\u7ecd\uff1a5\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784\u300b\uff0c\u804a\u804a\u6570\u636e\u7ed3\u6784\u3001Redis\u3001Java\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p><strong>&nbsp;\u4e00\u3001Redis \u7b80\u4ecb<\/strong><\/p>\n<p>&nbsp;&#8220;Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker.&#8221; \u2014\u2014 Redis\u662f\u4e00\u4e2a\u5f00\u653e\u6e90\u4ee3\u7801\uff08BSD\u8bb8\u53ef\uff09\u7684\u5185\u5b58\u4e2d\u6570\u636e\u7ed3\u6784\u5b58\u50a8\uff0c\u7528\u4f5c\u6570\u636e\u5e93\uff0c\u7f13\u5b58\u548c\u6d88\u606f\u4ee3\u7406\u3002(\u6458\u81ea\u5b98\u7f51)<\/p>\n<p>Redis \u662f\u4e00\u4e2a\u5f00\u6e90\uff0c\u9ad8\u7ea7\u7684\u952e\u503c\u5b58\u50a8\u548c\u4e00\u4e2a\u9002\u7528\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u7528\u4e8e\u6784\u5efa\u9ad8\u6027\u80fd\uff0c\u53ef\u6269\u5c55\u7684 Web \u5e94\u7528\u7a0b\u5e8f\u3002Redis \u4e5f\u88ab\u4f5c\u8005\u620f\u79f0\u4e3a \u6570\u636e\u7ed3\u6784\u670d\u52a1\u5668 \uff0c\u8fd9\u610f\u5473\u7740\u4f7f\u7528\u8005\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e9b\u547d\u4ee4\uff0c\u57fa\u4e8e\u5e26\u6709 TCP \u5957\u63a5\u5b57\u7684\u7b80\u5355 \u670d\u52a1\u5668-\u5ba2\u6237\u7aef \u534f\u8bae\u6765\u8bbf\u95ee\u4e00\u7ec4 \u53ef\u53d8\u6570\u636e\u7ed3\u6784 \u3002(\u5728 Redis \u4e2d\u90fd\u91c7\u7528\u952e\u503c\u5bf9\u7684\u65b9\u5f0f\uff0c\u53ea\u4e0d\u8fc7\u5bf9\u5e94\u7684\u6570\u636e\u7ed3\u6784\u4e0d\u4e00\u6837\u7f62\u4e86)<\/p>\n<p><strong>Redis \u7684\u4f18\u70b9<\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f Redis \u7684\u4e00\u4e9b\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>&nbsp;<strong>\u5f02\u5e38\u5feb<\/strong> &#8211; Redis \u975e\u5e38\u5feb\uff0c\u6bcf\u79d2\u53ef\u6267\u884c\u5927\u7ea6 110000 \u6b21\u7684\u8bbe\u7f6e(SET)\u64cd\u4f5c\uff0c\u6bcf\u79d2\u5927\u7ea6\u53ef\u6267\u884c 81000 \u6b21\u7684\u8bfb\u53d6\/\u83b7\u53d6(GET)\u64cd\u4f5c\u3002<\/li>\n<li>&nbsp;<strong>\u652f\u6301\u4e30\u5bcc\u7684\u6570\u636e\u7c7b\u578b <\/strong>&#8211; Redis \u652f\u6301\u5f00\u53d1\u4eba\u5458\u5e38\u7528\u7684\u5927\u591a\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4f8b\u5982\u5217\u8868\uff0c\u96c6\u5408\uff0c\u6392\u5e8f\u96c6\u548c\u6563\u5217\u7b49\u7b49\u3002\u8fd9\u4f7f\u5f97 Redis \u5f88\u5bb9\u6613\u88ab\u7528\u6765\u89e3\u51b3\u5404\u79cd\u95ee\u9898\uff0c\u56e0\u4e3a\u6211\u4eec\u77e5\u9053\u54ea\u4e9b\u95ee\u9898\u53ef\u4ee5\u66f4\u597d\u4f7f\u7528\u5730\u54ea\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u5904\u7406\u89e3\u51b3\u3002<\/li>\n<li>&nbsp;<strong>\u64cd\u4f5c\u5177\u6709\u539f\u5b50\u6027<\/strong> &#8211; \u6240\u6709 Redis \u64cd\u4f5c\u90fd\u662f\u539f\u5b50\u64cd\u4f5c\uff0c\u8fd9\u786e\u4fdd\u5982\u679c\u4e24\u4e2a\u5ba2\u6237\u7aef\u5e76\u53d1\u8bbf\u95ee\uff0cRedis \u670d\u52a1\u5668\u80fd\u63a5\u6536\u66f4\u65b0\u7684\u503c\u3002<\/li>\n<li>&nbsp;<strong>\u591a\u5b9e\u7528\u5de5\u5177<\/strong> &#8211; Redis \u662f\u4e00\u4e2a\u591a\u5b9e\u7528\u5de5\u5177\uff0c\u53ef\u7528\u4e8e\u591a\u79cd\u7528\u4f8b\uff0c\u5982\uff1a\u7f13\u5b58\uff0c\u6d88\u606f\u961f\u5217(Redis \u672c\u5730\u652f\u6301\u53d1\u5e03\/\u8ba2\u9605)\uff0c\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u4efb\u4f55\u77ed\u671f\u6570\u636e\uff0c\u4f8b\u5982\uff0cweb\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u4f1a\u8bdd\uff0c\u7f51\u9875\u547d\u4e2d\u8ba1\u6570\u7b49\u3002<\/li>\n<\/ul>\n<p><strong>Redis \u7684\u5b89\u88c5<\/strong><\/p>\n<p>\u8fd9\u4e00\u6b65\u6bd4\u8f83\u7b80\u5355\uff0c\u4f60\u53ef\u4ee5\u5728\u7f51\u4e0a\u641c\u5230\u8bb8\u591a\u6ee1\u610f\u7684\u6559\u7a0b\uff0c\u8fd9\u91cc\u5c31\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n<p>\u7ed9\u4e00\u4e2a\u83dc\u9e1f\u6559\u7a0b\u7684\u5b89\u88c5\u6559\u7a0b\u7528\u4f5c\u53c2\u8003\uff1a<\/p>\n<p><strong>\u6d4b\u8bd5\u672c\u5730 Redis \u6027\u80fd<\/strong><\/p>\n<p>\u5f53\u4f60\u5b89\u88c5\u5b8c\u6210\u4e4b\u540e\uff0c\u4f60\u53ef\u4ee5\u5148\u6267\u884c redis-server \u8ba9 Redis \u542f\u52a8\u8d77\u6765\uff0c\u7136\u540e\u8fd0\u884c\u547d\u4ee4 redis-benchmark -n 100000 -q \u6765\u68c0\u6d4b\u672c\u5730\u540c\u65f6\u6267\u884c 10 \u4e07\u4e2a\u8bf7\u6c42\u65f6\u7684\u6027\u80fd\uff1a<\/p>\n<\/p>\n<p>\u5f53\u7136\u4e0d\u540c\u7535\u8111\u4e4b\u95f4\u7531\u4e8e\u5404\u65b9\u9762\u7684\u539f\u56e0\u4f1a\u5b58\u5728\u6027\u80fd\u5dee\u8ddd\uff0c\u8fd9\u4e2a\u6d4b\u8bd5\u60a8\u53ef\u4ee5\u6743\u5f53\u662f\u4e00\u79cd \u300c\u4e50\u8da3\u300d \u5c31\u597d\u3002<\/p>\n<p><strong>\u4e8c\u3001Redis \u4e94\u79cd\u57fa\u672c\u6570\u636e\u7ed3\u6784<\/strong><\/p>\n<p>Redis \u6709 5 \u79cd\u57fa\u7840\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u4eec\u5206\u522b\u662f\uff1astring(\u5b57\u7b26\u4e32)\u3001list(\u5217\u8868)\u3001hash(\u5b57\u5178)\u3001set(\u96c6\u5408) \u548c zset(\u6709\u5e8f\u96c6\u5408)\u3002\u8fd9 5 \u79cd\u662f Redis \u76f8\u5173\u77e5\u8bc6\u4e2d\u6700\u57fa\u7840\u3001\u6700\u91cd\u8981\u7684\u90e8\u5206\uff0c\u4e0b\u9762\u6211\u4eec\u7ed3\u5408\u6e90\u7801\u4ee5\u53ca\u4e00\u4e9b\u5b9e\u8df5\u6765\u7ed9\u5927\u5bb6\u5206\u522b\u8bb2\u89e3\u4e00\u4e0b\u3002<\/p>\n<p><strong>1\uff09\u5b57\u7b26\u4e32 string<\/strong><\/p>\n<p>Redis \u4e2d\u7684\u5b57\u7b26\u4e32\u662f\u4e00\u79cd \u52a8\u6001\u5b57\u7b26\u4e32\uff0c\u8fd9\u610f\u5473\u7740\u4f7f\u7528\u8005\u53ef\u4ee5\u4fee\u6539\uff0c\u5b83\u7684\u5e95\u5c42\u5b9e\u73b0\u6709\u70b9\u7c7b\u4f3c\u4e8e Java \u4e2d\u7684 ArrayList\uff0c\u6709\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\uff0c\u4ece\u6e90\u7801\u7684 sds.h\/sdshdr \u6587\u4ef6 \u4e2d\u53ef\u4ee5\u770b\u5230 Redis \u5e95\u5c42\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7684\u5b9a\u4e49 SDS\uff0c\u5373 Simple Dynamic String \u7ed3\u6784\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>\/*&nbsp;Note:&nbsp;sdshdr5&nbsp;is&nbsp;never&nbsp;used,&nbsp;we&nbsp;just&nbsp;access&nbsp;the&nbsp;flags&nbsp;byte&nbsp;directly.&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;*&nbsp;However&nbsp;is&nbsp;here&nbsp;to&nbsp;document&nbsp;the&nbsp;layout&nbsp;of&nbsp;type&nbsp;5&nbsp;SDS&nbsp;strings.&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>struct&nbsp;__attribute__&nbsp;((__packed__))&nbsp;sdshdr5&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;char&nbsp;flags;&nbsp;\/*&nbsp;3&nbsp;lsb&nbsp;of&nbsp;type,&nbsp;and&nbsp;5&nbsp;msb&nbsp;of&nbsp;string&nbsp;length&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;buf[];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>};&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>struct&nbsp;__attribute__&nbsp;((__packed__))&nbsp;sdshdr8&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint8_t&nbsp;len;&nbsp;\/*&nbsp;used&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint8_t&nbsp;alloc;&nbsp;\/*&nbsp;excluding&nbsp;the&nbsp;header&nbsp;and&nbsp;null&nbsp;terminator&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;char&nbsp;flags;&nbsp;\/*&nbsp;3&nbsp;lsb&nbsp;of&nbsp;type,&nbsp;5&nbsp;unused&nbsp;bits&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;buf[];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>};&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>struct&nbsp;__attribute__&nbsp;((__packed__))&nbsp;sdshdr16&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint16_t&nbsp;len;&nbsp;\/*&nbsp;used&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint16_t&nbsp;alloc;&nbsp;\/*&nbsp;excluding&nbsp;the&nbsp;header&nbsp;and&nbsp;null&nbsp;terminator&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;char&nbsp;flags;&nbsp;\/*&nbsp;3&nbsp;lsb&nbsp;of&nbsp;type,&nbsp;5&nbsp;unused&nbsp;bits&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;buf[];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>};&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>struct&nbsp;__attribute__&nbsp;((__packed__))&nbsp;sdshdr32&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint32_t&nbsp;len;&nbsp;\/*&nbsp;used&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint32_t&nbsp;alloc;&nbsp;\/*&nbsp;excluding&nbsp;the&nbsp;header&nbsp;and&nbsp;null&nbsp;terminator&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;char&nbsp;flags;&nbsp;\/*&nbsp;3&nbsp;lsb&nbsp;of&nbsp;type,&nbsp;5&nbsp;unused&nbsp;bits&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;buf[];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>};&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>struct&nbsp;__attribute__&nbsp;((__packed__))&nbsp;sdshdr64&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint64_t&nbsp;len;&nbsp;\/*&nbsp;used&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;uint64_t&nbsp;alloc;&nbsp;\/*&nbsp;excluding&nbsp;the&nbsp;header&nbsp;and&nbsp;null&nbsp;terminator&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;char&nbsp;flags;&nbsp;\/*&nbsp;3&nbsp;lsb&nbsp;of&nbsp;type,&nbsp;5&nbsp;unused&nbsp;bits&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;char&nbsp;buf[];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>};&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u4f60\u4f1a\u53d1\u73b0\u540c\u6837\u4e00\u7ec4\u7ed3\u6784 Redis \u4f7f\u7528\u6cdb\u578b\u5b9a\u4e49\u4e86\u597d\u591a\u6b21\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u76f4\u63a5\u4f7f\u7528 int \u7c7b\u578b\u5462\uff1f<\/p>\n<p>\u56e0\u4e3a\u5f53\u5b57\u7b26\u4e32\u6bd4\u8f83\u77ed\u7684\u65f6\u5019\uff0clen \u548c alloc \u53ef\u4ee5\u4f7f\u7528 byte \u548c short \u6765\u8868\u793a\uff0cRedis \u4e3a\u4e86\u5bf9\u5185\u5b58\u505a\u6781\u81f4\u7684\u4f18\u5316\uff0c\u4e0d\u540c\u957f\u5ea6\u7684\u5b57\u7b26\u4e32\u4f7f\u7528\u4e0d\u540c\u7684\u7ed3\u6784\u4f53\u6765\u8868\u793a\u3002<\/p>\n<p><strong>SDS \u4e0e C \u5b57\u7b26\u4e32\u7684\u533a\u522b<\/strong><\/p>\n<p>\u4e3a\u4ec0\u4e48\u4e0d\u8003\u8651\u76f4\u63a5\u4f7f\u7528 C \u8bed\u8a00\u7684\u5b57\u7b26\u4e32\u5462\uff1f\u56e0\u4e3a C \u8bed\u8a00\u8fd9\u79cd\u7b80\u5355\u7684\u5b57\u7b26\u4e32\u8868\u793a\u65b9\u5f0f \u4e0d\u7b26\u5408 Redis \u5bf9\u5b57\u7b26\u4e32\u5728\u5b89\u5168\u6027\u3001\u6548\u7387\u4ee5\u53ca\u529f\u80fd\u65b9\u9762\u7684\u8981\u6c42\u3002\u6211\u4eec\u77e5\u9053\uff0cC \u8bed\u8a00\u4f7f\u7528\u4e86\u4e00\u4e2a\u957f\u5ea6\u4e3a N+1 \u7684\u5b57\u7b26\u6570\u7ec4\u6765\u8868\u793a\u957f\u5ea6\u4e3a N \u7684\u5b57\u7b26\u4e32\uff0c\u5e76\u4e14\u5b57\u7b26\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u603b\u662f &#8216;\\0&#8217;\u3002(\u4e0b\u56fe\u5c31\u5c55\u793a\u4e86 C \u8bed\u8a00\u4e2d\u503c\u4e3a &#8220;Redis&#8221; \u7684\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4)<\/p>\n<\/p>\n<p>\u8fd9\u6837\u7b80\u5355\u7684\u6570\u636e\u7ed3\u6784\u53ef\u80fd\u4f1a\u9020\u6210\u4ee5\u4e0b\u4e00\u4e9b\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>&nbsp;<strong>\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a O(N) \u7ea7\u522b\u7684\u64cd\u4f5c <\/strong>\u2192 \u56e0\u4e3a C \u4e0d\u4fdd\u5b58\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u6bcf\u6b21\u90fd\u9700\u8981\u904d\u5386\u4e00\u904d\u6574\u4e2a\u6570\u7ec4\uff1b<\/li>\n<li>&nbsp;\u4e0d\u80fd\u5f88\u597d\u7684\u675c\u7edd \u7f13<strong>\u51b2\u533a\u6ea2\u51fa\/\u5185\u5b58\u6cc4\u6f0f<\/strong> \u7684\u95ee\u9898 \u2192 \u8ddf\u4e0a\u8ff0\u95ee\u9898\u539f\u56e0\u4e00\u6837\uff0c\u5982\u679c\u6267\u884c\u62fc\u63a5 or \u7f29\u77ed\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\uff0c\u5982\u679c\u64cd\u4f5c\u4e0d\u5f53\u5c31\u5f88\u5bb9\u6613\u9020\u6210\u4e0a\u8ff0\u95ee\u9898\uff1b<\/li>\n<li>&nbsp;C \u5b57\u7b26\u4e32 <strong>\u53ea\u80fd\u4fdd\u5b58\u6587\u672c\u6570\u636e<\/strong> \u2192 \u56e0\u4e3a C \u8bed\u8a00\u4e2d\u7684\u5b57\u7b26\u4e32\u5fc5\u987b\u7b26\u5408\u67d0\u79cd\u7f16\u7801\uff08\u6bd4\u5982 ASCII\uff09\uff0c\u4f8b\u5982\u4e2d\u95f4\u51fa\u73b0\u7684 &#8216;\\0&#8217; \u53ef\u80fd\u4f1a\u88ab\u5224\u5b9a\u4e3a\u63d0\u524d\u7ed3\u675f\u7684\u5b57\u7b26\u4e32\u800c\u8bc6\u522b\u4e0d\u4e86\uff1b<\/li>\n<\/ul>\n<p>\u6211\u4eec\u4ee5\u8ffd\u52a0\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u4e3e\u4f8b\uff0cRedis \u6e90\u7801\u5982\u4e0b\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>\/*&nbsp;Append&nbsp;the&nbsp;specified&nbsp;binary-safe&nbsp;string&nbsp;pointed&nbsp;by&nbsp;&#8216;t&#8217;&nbsp;of&nbsp;&#8216;len&#8217;&nbsp;bytes&nbsp;to&nbsp;the&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;*&nbsp;end&nbsp;of&nbsp;the&nbsp;specified&nbsp;sds&nbsp;string&nbsp;&#8216;s&#8217;.&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;*&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;*&nbsp;After&nbsp;the&nbsp;call,&nbsp;the&nbsp;passed&nbsp;sds&nbsp;string&nbsp;is&nbsp;no&nbsp;longer&nbsp;valid&nbsp;and&nbsp;all&nbsp;the&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;*&nbsp;references&nbsp;must&nbsp;be&nbsp;substituted&nbsp;with&nbsp;the&nbsp;new&nbsp;pointer&nbsp;returned&nbsp;by&nbsp;the&nbsp;call.&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>sds&nbsp;sdscatlen(sds&nbsp;s,&nbsp;const&nbsp;void&nbsp;*t,&nbsp;size_t&nbsp;len)&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u83b7\u53d6\u539f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;size_t&nbsp;<span>curlen<\/span><span>&nbsp;=&nbsp;<\/span><span>sdslen<\/span><span>(s);&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u6309\u9700\u8c03\u6574\u7a7a\u95f4\uff0c\u5982\u679c\u5bb9\u91cf\u4e0d\u591f\u5bb9\u7eb3\u8ffd\u52a0\u7684\u5185\u5bb9\uff0c\u5c31\u4f1a\u91cd\u65b0\u5206\u914d\u5b57\u8282\u6570\u7ec4\u5e76\u590d\u5236\u539f\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u5230\u65b0\u6570\u7ec4\u4e2d&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;<span>s<\/span><span>&nbsp;=&nbsp;<\/span><span>sdsMakeRoomFor<\/span><span>(s,len);&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(<span>s<\/span><span>&nbsp;==&nbsp;NULL)&nbsp;return&nbsp;NULL;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u5185\u5b58\u4e0d\u8db3&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;memcpy(s+curlen,&nbsp;t,&nbsp;len);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u8ffd\u52a0\u76ee\u6807\u5b57\u7b26\u4e32\u5230\u5b57\u8282\u6570\u7ec4\u4e2d&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;sdssetlen(s,&nbsp;curlen+len);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u8bbe\u7f6e\u8ffd\u52a0\u540e\u7684\u957f\u5ea6&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;s[curlen+len]&nbsp;=&nbsp;&#8216;\\0&#8217;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u8ba9\u5b57\u7b26\u4e32\u4ee5&nbsp;\\0&nbsp;\u7ed3\u5c3e\uff0c\u4fbf\u4e8e\u8c03\u8bd5\u6253\u5370&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;s;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;<\/span><\/li>\n<\/ol>\n<ul>\n<li>&nbsp;\u6ce8\uff1aRedis \u89c4\u5b9a\u4e86\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u4e0d\u5f97\u8d85\u8fc7 512 MB\u3002<\/li>\n<\/ul>\n<p><strong>\u5bf9\u5b57\u7b26\u4e32\u7684\u57fa\u672c\u64cd\u4f5c<\/strong><\/p>\n<p>\u5b89\u88c5\u597d Redis\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 redis-cli \u6765\u5bf9 Redis \u8fdb\u884c\u547d\u4ee4\u884c\u7684\u64cd\u4f5c\uff0c\u5f53\u7136 Redis \u5b98\u65b9\u4e5f\u63d0\u4f9b\u4e86\u5728\u7ebf\u7684\u8c03\u8bd5\u5668\uff0c\u4f60\u4e5f\u53ef\u4ee5\u5728\u91cc\u9762\u6572\u5165\u547d\u4ee4\u8fdb\u884c\u64cd\u4f5c\uff1ahttp:\/\/try.redis.io\/#run<\/p>\n<p><strong>\u8bbe\u7f6e\u548c\u83b7\u53d6\u952e\u503c\u5bf9<\/strong>&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key&nbsp;value&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>OK&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;value&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u6b63\u5982\u4f60\u770b\u5230\u7684\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528 SET \u548c GET \u6765\u8bbe\u7f6e\u548c\u83b7\u53d6\u5b57\u7b26\u4e32\u503c\u3002<\/p>\n<p>\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u79cd\u7c7b\u7684\u5b57\u7b26\u4e32\uff08\u5305\u62ec\u4e8c\u8fdb\u5236\u6570\u636e\uff09\uff0c\u4f8b\u5982\u4f60\u53ef\u4ee5\u5728\u4e00\u4e2a\u952e\u4e0b\u4fdd\u5b58\u4e00\u5f20 .jpeg \u56fe\u7247\uff0c\u53ea\u9700\u8981\u6ce8\u610f\u4e0d\u8981\u8d85\u8fc7 512 MB \u7684\u6700\u5927\u9650\u5ea6\u5c31\u597d\u4e86\u3002<\/p>\n<p>\u5f53 key \u5b58\u5728\u65f6\uff0cSET \u547d\u4ee4\u4f1a\u8986\u76d6\u6389\u4f60\u4e0a\u4e00\u6b21\u8bbe\u7f6e\u7684\u503c\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key&nbsp;newValue&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>OK&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;newValue&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u53e6\u5916\u4f60\u8fd8\u53ef\u4ee5\u4f7f\u7528 EXISTS \u548c DEL \u5173\u952e\u5b57\u6765\u67e5\u8be2\u662f\u5426\u5b58\u5728\u548c\u5220\u9664\u952e\u503c\u5bf9\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;EXISTS&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;DEL&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(nil)&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>\u6279\u91cf\u8bbe\u7f6e\u952e\u503c\u5bf9<\/strong>&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key1&nbsp;value1&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>OK&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key2&nbsp;value2&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>OK&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;MGET&nbsp;key1&nbsp;key2&nbsp;key3&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u8fd4\u56de\u4e00\u4e2a\u5217\u8868&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;value1&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;value2&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;(nil)&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;MSET&nbsp;key1&nbsp;value1&nbsp;key2&nbsp;value2&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;MGET&nbsp;key1&nbsp;key2&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;value1&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;value2&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>\u8fc7\u671f\u548c SET \u547d\u4ee4\u6269\u5c55<\/strong><\/p>\n<p>\u53ef\u4ee5\u5bf9 key \u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\uff0c\u5230\u65f6\u95f4\u4f1a\u88ab\u81ea\u52a8\u5220\u9664\uff0c\u8fd9\u4e2a\u529f\u80fd\u5e38\u7528\u6765\u63a7\u5236\u7f13\u5b58\u7684\u5931\u6548\u65f6\u95f4\u3002(\u8fc7\u671f\u53ef\u4ee5\u662f\u4efb\u610f\u6570\u636e\u7ed3\u6784)&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key&nbsp;value1&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;value1&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;EXPIRE&nbsp;name&nbsp;5&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;5s&nbsp;\u540e\u8fc7\u671f&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8230;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u7b49\u5f85&nbsp;5s&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span>&nbsp;<\/li>\n<li><span>(nil)&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u7b49\u4ef7\u4e8e SET + EXPIRE \u7684 SETNX \u547d\u4ee4\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SETNX&nbsp;key&nbsp;value1&nbsp;<\/span><\/span>&nbsp;<\/li>\n<li><span>&#8230;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u7b49\u5f85&nbsp;5s&nbsp;\u540e\u83b7\u53d6&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(nil)&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SETNX&nbsp;key&nbsp;value1&nbsp;&nbsp;#&nbsp;\u5982\u679c&nbsp;key&nbsp;\u4e0d\u5b58\u5728\u5219&nbsp;SET&nbsp;\u6210\u529f&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SETNX&nbsp;key&nbsp;value1&nbsp;&nbsp;#&nbsp;\u5982\u679c&nbsp;key&nbsp;\u5b58\u5728\u5219&nbsp;SET&nbsp;\u5931\u8d25&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;0&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GET&nbsp;key&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;value&#8221;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6ca1\u6709\u6539\u53d8&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>\u8ba1\u6570<\/strong><\/p>\n<p>\u5982\u679c value \u662f\u4e00\u4e2a\u6574\u6570\uff0c\u8fd8\u53ef\u4ee5\u5bf9\u5b83\u4f7f\u7528 INCR \u547d\u4ee4\u8fdb\u884c \u539f\u5b50\u6027 \u7684\u81ea\u589e\u64cd\u4f5c\uff0c\u8fd9\u610f\u5473\u7740\u53ca\u65f6\u591a\u4e2a\u5ba2\u6237\u7aef\u5bf9\u540c\u4e00\u4e2a key \u8fdb\u884c\u64cd\u4f5c\uff0c\u4e5f\u51b3\u4e0d\u4f1a\u5bfc\u81f4\u7ade\u4e89\u7684\u60c5\u51b5\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;counter&nbsp;100&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;INCR&nbsp;count&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(interger)&nbsp;101&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;INCRBY&nbsp;counter&nbsp;50&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;151&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>\u8fd4\u56de\u539f\u503c\u7684 GETSET \u547d\u4ee4<\/strong><\/p>\n<p>\u5bf9\u5b57\u7b26\u4e32\uff0c\u8fd8\u6709\u4e00\u4e2a GETSET \u6bd4\u8f83\u8ba9\u4eba\u89c9\u5f97\u6709\u610f\u601d\uff0c\u5b83\u7684\u529f\u80fd\u8ddf\u5b83\u540d\u5b57\u4e00\u6837\uff1a\u4e3a key \u8bbe\u7f6e\u4e00\u4e2a\u503c\u5e76\u8fd4\u56de\u539f\u503c\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SET&nbsp;key&nbsp;value&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;GETSET&nbsp;key&nbsp;value1&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;value&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u8fd9\u53ef\u4ee5\u5bf9\u4e8e\u67d0\u4e00\u4e9b\u9700\u8981\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u7edf\u8ba1\u7684 key \u5f88\u65b9\u4fbf\u7684\u8bbe\u7f6e\u548c\u67e5\u770b\uff0c\u4f8b\u5982\uff1a\u7cfb\u7edf\u6bcf\u5f53\u7531\u7528\u6237\u8fdb\u5165\u7684\u65f6\u5019\u4f60\u5c31\u662f\u7528 INCR \u547d\u4ee4\u64cd\u4f5c\u4e00\u4e2a key\uff0c\u5f53\u9700\u8981\u7edf\u8ba1\u65f6\u5019\u4f60\u5c31\u628a\u8fd9\u4e2a key \u4f7f\u7528 GETSET \u547d\u4ee4\u91cd\u65b0\u8d4b\u503c\u4e3a 0\uff0c\u8fd9\u6837\u5c31\u8fbe\u5230\u4e86\u7edf\u8ba1\u7684\u76ee\u7684\u3002<\/p>\n<p><strong>2\uff09\u5217\u8868 list<\/strong><\/p>\n<p>Redis \u7684\u5217\u8868\u76f8\u5f53\u4e8e Java \u8bed\u8a00\u4e2d\u7684 LinkedList\uff0c\u6ce8\u610f\u5b83\u662f\u94fe\u8868\u800c\u4e0d\u662f\u6570\u7ec4\u3002\u8fd9\u610f\u5473\u7740 list \u7684\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u975e\u5e38\u5feb\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1)\uff0c\u4f46\u662f\u7d22\u5f15\u5b9a\u4f4d\u5f88\u6162\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4ece\u6e90\u7801\u7684 adlist.h\/listNode \u6765\u770b\u5230\u5bf9\u5176\u7684\u5b9a\u4e49\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>\/*&nbsp;Node,&nbsp;List,&nbsp;and&nbsp;Iterator&nbsp;are&nbsp;the&nbsp;only&nbsp;data&nbsp;structures&nbsp;used&nbsp;currently.&nbsp;*\/&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>typedef&nbsp;struct&nbsp;listNode&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;struct&nbsp;listNode&nbsp;*prev;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;struct&nbsp;listNode&nbsp;*next;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;*value;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;listNode;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>typedef&nbsp;struct&nbsp;listIter&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;listNode&nbsp;*next;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;direction;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;listIter;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>typedef&nbsp;struct&nbsp;list&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;listNode&nbsp;*head;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;listNode&nbsp;*tail;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;*(*dup)(void&nbsp;*ptr);&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;(*free)(void&nbsp;*ptr);&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;(*match)(void&nbsp;*ptr,&nbsp;void&nbsp;*key);&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;long&nbsp;len;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;list;&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u591a\u4e2a listNode \u53ef\u4ee5\u901a\u8fc7 prev \u548c next \u6307\u9488\u7ec4\u6210\u53cc\u5411\u94fe\u8868\uff1a<\/p>\n<\/p>\n<p>\u867d\u7136\u4ec5\u4ec5\u4f7f\u7528\u591a\u4e2a listNode \u7ed3\u6784\u5c31\u53ef\u4ee5\u7ec4\u6210\u94fe\u8868\uff0c\u4f46\u662f\u4f7f\u7528 adlist.h\/list \u7ed3\u6784\u6765\u6301\u6709\u94fe\u8868\u7684\u8bdd\uff0c\u64cd\u4f5c\u8d77\u6765\u4f1a\u66f4\u52a0\u65b9\u4fbf\uff1a<\/p>\n<\/p>\n<p><strong>\u94fe\u8868\u7684\u57fa\u672c\u64cd\u4f5c<\/strong><\/p>\n<ul>\n<li>&nbsp;LPUSH \u548c RPUSH \u5206\u522b\u53ef\u4ee5\u5411 list \u7684\u5de6\u8fb9\uff08\u5934\u90e8\uff09\u548c\u53f3\u8fb9\uff08\u5c3e\u90e8\uff09\u6dfb\u52a0\u4e00\u4e2a\u65b0\u5143\u7d20\uff1b<\/li>\n<li>&nbsp;LRANGE \u547d\u4ee4\u53ef\u4ee5\u4ece list \u4e2d\u53d6\u51fa\u4e00\u5b9a\u8303\u56f4\u7684\u5143\u7d20\uff1b<\/li>\n<li>&nbsp;LINDEX \u547d\u4ee4\u53ef\u4ee5\u4ece list \u4e2d\u53d6\u51fa\u6307\u5b9a\u4e0b\u8868\u7684\u5143\u7d20\uff0c\u76f8\u5f53\u4e8e Java \u94fe\u8868\u64cd\u4f5c\u4e2d\u7684 get(int index) \u64cd\u4f5c\uff1b<\/li>\n<\/ul>\n<p>\u793a\u8303\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;rpush&nbsp;mylist&nbsp;A&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;rpush&nbsp;mylist&nbsp;B&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;2&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;lpush&nbsp;mylist&nbsp;first&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;3&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;lrange&nbsp;mylist&nbsp;0&nbsp;-1&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;-1&nbsp;\u8868\u793a\u5012\u6570\u7b2c\u4e00\u4e2a\u5143\u7d20,&nbsp;\u8fd9\u91cc\u8868\u793a\u4ece\u7b2c\u4e00\u4e2a\u5143\u7d20\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff0c\u5373\u6240\u6709&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;first&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;A&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;B&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>list \u5b9e\u73b0\u961f\u5217<\/strong><\/p>\n<p>\u961f\u5217\u662f\u5148\u8fdb\u5148\u51fa\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5e38\u7528\u4e8e\u6d88\u606f\u6392\u961f\u548c\u5f02\u6b65\u903b\u8f91\u5904\u7406\uff0c\u5b83\u4f1a\u786e\u4fdd\u5143\u7d20\u7684\u8bbf\u95ee\u987a\u5e8f\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;RPUSH&nbsp;books&nbsp;python&nbsp;java&nbsp;golang&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;3&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;LPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;python&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;LPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;java&#8221;&nbsp;<\/span>&nbsp;<\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;LPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;golang&#8221;&nbsp;<\/span>&nbsp;<\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;LPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(nil)&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>list \u5b9e\u73b0\u6808<\/strong><\/p>\n<p>\u6808\u662f\u5148\u8fdb\u540e\u51fa\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8ddf\u961f\u5217\u6b63\u597d\u76f8\u53cd\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;RPUSH&nbsp;books&nbsp;python&nbsp;java&nbsp;golang&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;RPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;golang&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;RPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;RPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;python&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;RPOP&nbsp;books&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(nil)&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>3\uff09\u5b57\u5178 hash<\/strong><\/p>\n<p>Redis \u4e2d\u7684\u5b57\u5178\u76f8\u5f53\u4e8e Java \u4e2d\u7684 HashMap\uff0c\u5185\u90e8\u5b9e\u73b0\u4e5f\u5dee\u4e0d\u591a\u7c7b\u4f3c\uff0c\u90fd\u662f\u901a\u8fc7 &#8220;\u6570\u7ec4 + \u94fe\u8868&#8221; \u7684\u94fe\u5730\u5740\u6cd5\u6765\u89e3\u51b3\u90e8\u5206 \u54c8\u5e0c\u51b2\u7a81\uff0c\u540c\u65f6\u8fd9\u6837\u7684\u7ed3\u6784\u4e5f\u5438\u6536\u4e86\u4e24\u79cd\u4e0d\u540c\u6570\u636e\u7ed3\u6784\u7684\u4f18\u70b9\u3002\u6e90\u7801\u5b9a\u4e49\u5982 dict.h\/dictht \u5b9a\u4e49\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>typedef&nbsp;struct&nbsp;dictht&nbsp;{&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u54c8\u5e0c\u8868\u6570\u7ec4&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;dictEntry&nbsp;**table;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u54c8\u5e0c\u8868\u5927\u5c0f&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;long&nbsp;size;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u54c8\u5e0c\u8868\u5927\u5c0f\u63a9\u7801\uff0c\u7528\u4e8e\u8ba1\u7b97\u7d22\u5f15\u503c\uff0c\u603b\u662f\u7b49\u4e8e&nbsp;size&nbsp;&#8211;&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;long&nbsp;sizemask;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u8be5\u54c8\u5e0c\u8868\u5df2\u6709\u8282\u70b9\u7684\u6570\u91cf&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;long&nbsp;used;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;dictht;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>typedef&nbsp;struct&nbsp;dict&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;dictType&nbsp;*type;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;*privdata;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u5185\u90e8\u6709\u4e24\u4e2a&nbsp;dictht&nbsp;\u7ed3\u6784&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;dictht&nbsp;ht[2];&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;long&nbsp;rehashidx;&nbsp;\/*&nbsp;rehashing&nbsp;not&nbsp;in&nbsp;progress&nbsp;if&nbsp;<span>rehashidx<\/span><span>&nbsp;==&nbsp;-1&nbsp;*\/&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;unsigned&nbsp;long&nbsp;iterators;&nbsp;\/*&nbsp;number&nbsp;of&nbsp;iterators&nbsp;currently&nbsp;running&nbsp;*\/&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;dict;&nbsp;<\/span><\/li>\n<\/ol>\n<p>table \u5c5e\u6027\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u6307\u5411 dict.h\/dictEntry \u7ed3\u6784\u7684\u6307\u9488\uff0c\u800c\u6bcf\u4e2a dictEntry \u7ed3\u6784\u4fdd\u5b58\u7740\u4e00\u4e2a\u952e\u503c\u5bf9\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>typedef&nbsp;struct&nbsp;dictEntry&nbsp;{&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u952e&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;*key;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u503c&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;union&nbsp;{&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;void&nbsp;*val;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uint64_t&nbsp;u64;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int64_t&nbsp;s64;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;double&nbsp;d;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;v;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;\/\/&nbsp;\u6307\u5411\u4e0b\u4e2a\u54c8\u5e0c\u8868\u8282\u70b9\uff0c\u5f62\u6210\u94fe\u8868&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>&nbsp;&nbsp;&nbsp;&nbsp;struct&nbsp;dictEntry&nbsp;*next;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>}&nbsp;dictEntry;&nbsp;<\/span><\/li>\n<\/ol>\n<p>\u53ef\u4ee5\u4ece\u4e0a\u9762\u7684\u6e90\u7801\u4e2d\u770b\u5230\uff0c\u5b9e\u9645\u4e0a\u5b57\u5178\u7ed3\u6784\u7684\u5185\u90e8\u5305\u542b\u4e24\u4e2a hashtable\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\u53ea\u6709\u4e00\u4e2a hashtable \u662f\u6709\u503c\u7684\uff0c\u4f46\u662f\u5728\u5b57\u5178\u6269\u5bb9\u7f29\u5bb9\u65f6\uff0c\u9700\u8981\u5206\u914d\u65b0\u7684 hashtable\uff0c\u7136\u540e\u8fdb\u884c \u6e10\u8fdb\u5f0f\u642c\u8fc1 (\u4e0b\u9762\u8bf4\u539f\u56e0)\u3002<\/p>\n<p><strong>\u6e10\u8fdb\u5f0f rehash<\/strong><\/p>\n<p>\u5927\u5b57\u5178\u7684\u6269\u5bb9\u662f\u6bd4\u8f83\u8017\u65f6\u95f4\u7684\uff0c\u9700\u8981\u91cd\u65b0\u7533\u8bf7\u65b0\u7684\u6570\u7ec4\uff0c\u7136\u540e\u5c06\u65e7\u5b57\u5178\u6240\u6709\u94fe\u8868\u4e2d\u7684\u5143\u7d20\u91cd\u65b0\u6302\u63a5\u5230\u65b0\u7684\u6570\u7ec4\u4e0b\u9762\uff0c\u8fd9\u662f\u4e00\u4e2a O(n) \u7ea7\u522b\u7684\u64cd\u4f5c\uff0c\u4f5c\u4e3a\u5355\u7ebf\u7a0b\u7684 Redis \u5f88\u96be\u627f\u53d7\u8fd9\u6837\u8017\u65f6\u7684\u8fc7\u7a0b\uff0c\u6240\u4ee5 Redis \u4f7f\u7528 \u6e10\u8fdb\u5f0f rehash \u5c0f\u6b65\u642c\u8fc1\uff1a<\/p>\n<\/p>\n<p>\u6e10\u8fdb\u5f0f rehash \u4f1a\u5728 rehash \u7684\u540c\u65f6\uff0c\u4fdd\u7559\u65b0\u65e7\u4e24\u4e2a hash \u7ed3\u6784\uff0c\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u67e5\u8be2\u65f6\u4f1a\u540c\u65f6\u67e5\u8be2\u4e24\u4e2a hash \u7ed3\u6784\uff0c\u7136\u540e\u5728\u540e\u7eed\u7684\u5b9a\u65f6\u4efb\u52a1\u4ee5\u53ca hash \u64cd\u4f5c\u6307\u4ee4\u4e2d\uff0c\u5faa\u5e8f\u6e10\u8fdb\u7684\u628a\u65e7\u5b57\u5178\u7684\u5185\u5bb9\u8fc1\u79fb\u5230\u65b0\u5b57\u5178\u4e2d\u3002\u5f53\u642c\u8fc1\u5b8c\u6210\u4e86\uff0c\u5c31\u4f1a\u4f7f\u7528\u65b0\u7684 hash \u7ed3\u6784\u53d6\u800c\u4ee3\u4e4b\u3002<\/p>\n<p><strong>\u6269\u7f29\u5bb9\u7684\u6761\u4ef6<\/strong><\/p>\n<p>\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u5f53 hash \u8868\u4e2d \u5143\u7d20\u7684\u4e2a\u6570\u7b49\u4e8e\u7b2c\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u65f6\uff0c\u5c31\u4f1a\u5f00\u59cb\u6269\u5bb9\uff0c\u6269\u5bb9\u7684\u65b0\u6570\u7ec4\u662f \u539f\u6570\u7ec4\u5927\u5c0f\u7684 2 \u500d\u3002\u4e0d\u8fc7\u5982\u679c Redis \u6b63\u5728\u505a bgsave(\u6301\u4e45\u5316\u547d\u4ee4)\uff0c\u4e3a\u4e86\u51cf\u5c11\u5185\u5b58\u4e5f\u5f97\u8fc7\u591a\u5206\u79bb\uff0cRedis \u5c3d\u91cf\u4e0d\u53bb\u6269\u5bb9\uff0c\u4f46\u662f\u5982\u679c hash \u8868\u975e\u5e38\u6ee1\u4e86\uff0c\u8fbe\u5230\u4e86\u7b2c\u4e00\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684 5 \u500d\u4e86\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u4f1a \u5f3a\u5236\u6269\u5bb9\u3002<\/p>\n<p>\u5f53 hash \u8868\u56e0\u4e3a\u5143\u7d20\u9010\u6e10\u88ab\u5220\u9664\u53d8\u5f97\u8d8a\u6765\u8d8a\u7a00\u758f\u65f6\uff0cRedis \u4f1a\u5bf9 hash \u8868\u8fdb\u884c\u7f29\u5bb9\u6765\u51cf\u5c11 hash \u8868\u7684\u7b2c\u4e00\u7ef4\u6570\u7ec4\u7a7a\u95f4\u5360\u7528\u3002\u6240\u7528\u7684\u6761\u4ef6\u662f \u5143\u7d20\u4e2a\u6570\u4f4e\u4e8e\u6570\u7ec4\u957f\u5ea6\u7684 10%\uff0c\u7f29\u5bb9\u4e0d\u4f1a\u8003\u8651 Redis \u662f\u5426\u5728\u505a bgsave\u3002<\/p>\n<p><strong>\u5b57\u5178\u7684\u57fa\u672c\u64cd\u4f5c<\/strong><\/p>\n<p>hash \u4e5f\u6709\u7f3a\u70b9\uff0chash \u7ed3\u6784\u7684\u5b58\u50a8\u6d88\u8017\u8981\u9ad8\u4e8e\u5355\u4e2a\u5b57\u7b26\u4e32\uff0c\u6240\u4ee5\u5230\u5e95\u8be5\u4f7f\u7528 hash \u8fd8\u662f\u5b57\u7b26\u4e32\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u518d\u4e09\u6743\u8861\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;HSET&nbsp;books&nbsp;java&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u547d\u4ee4\u884c\u7684\u5b57\u7b26\u4e32\u5982\u679c\u5305\u542b\u7a7a\u683c\u5219\u9700\u8981\u4f7f\u7528\u5f15\u53f7\u5305\u88f9&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;HSET&nbsp;books&nbsp;python&nbsp;&#8220;python&nbsp;cookbook&#8221;&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;HGETALL&nbsp;books&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;key&nbsp;\u548c&nbsp;value&nbsp;\u95f4\u9694\u51fa\u73b0&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;python&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>4)&nbsp;&#8220;python&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;HGET&nbsp;books&nbsp;java&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;HSET&nbsp;books&nbsp;java&nbsp;&#8220;head&nbsp;first&nbsp;java&#8221;&nbsp;&nbsp;&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u56e0\u4e3a\u662f\u66f4\u65b0\u64cd\u4f5c\uff0c\u6240\u4ee5\u8fd4\u56de&nbsp;0&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;HMSET&nbsp;books&nbsp;java&nbsp;&#8220;effetive&nbsp;&nbsp;java&#8221;&nbsp;python&nbsp;&#8220;learning&nbsp;python&#8221;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6279\u91cf\u64cd\u4f5c&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>OK&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>4\uff09\u96c6\u5408 set<\/strong><\/p>\n<p>Redis \u7684\u96c6\u5408\u76f8\u5f53\u4e8e Java \u8bed\u8a00\u4e2d\u7684 HashSet\uff0c\u5b83\u5185\u90e8\u7684\u952e\u503c\u5bf9\u662f\u65e0\u5e8f\u3001\u552f\u4e00\u7684\u3002\u5b83\u7684\u5185\u90e8\u5b9e\u73b0\u76f8\u5f53\u4e8e\u4e00\u4e2a\u7279\u6b8a\u7684\u5b57\u5178\uff0c\u5b57\u5178\u4e2d\u6240\u6709\u7684 value \u90fd\u662f\u4e00\u4e2a\u503c NULL\u3002<\/p>\n<p><strong>\u96c6\u5408 set \u7684\u57fa\u672c\u4f7f\u7528<\/strong><\/p>\n<p>\u7531\u4e8e\u8be5\u7ed3\u6784\u6bd4\u8f83\u7b80\u5355\uff0c\u6211\u4eec\u76f4\u63a5\u6765\u770b\u770b\u662f\u5982\u4f55\u4f7f\u7528\u7684\uff1a&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;SADD&nbsp;books&nbsp;java&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SADD&nbsp;books&nbsp;java&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u91cd\u590d&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;0&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SADD&nbsp;books&nbsp;python&nbsp;golang&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;2&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SMEMBERS&nbsp;books&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6ce8\u610f\u987a\u5e8f\uff0cset&nbsp;\u662f\u65e0\u5e8f\u7684&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;python&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;golang&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SISMEMBER&nbsp;books&nbsp;java&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u67e5\u8be2\u67d0\u4e2a&nbsp;value&nbsp;\u662f\u5426\u5b58\u5728\uff0c\u76f8\u5f53\u4e8e&nbsp;contains&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SCARD&nbsp;books&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u83b7\u53d6\u957f\u5ea6&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;3&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;SPOP&nbsp;books&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u5f39\u51fa\u4e00\u4e2a&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;java&#8221;&nbsp;<\/span><\/li>\n<\/ol>\n<p><strong>5\uff09\u6709\u5e8f\u5217\u8868 zset<\/strong><\/p>\n<p>\u8fd9\u53ef\u80fd\u4f7f Redis \u6700\u5177\u7279\u8272\u7684\u4e00\u4e2a\u6570\u636e\u7ed3\u6784\u4e86\uff0c\u5b83\u7c7b\u4f3c\u4e8e Java \u4e2d SortedSet \u548c HashMap \u7684\u7ed3\u5408\u4f53\uff0c\u4e00\u65b9\u9762\u5b83\u662f\u4e00\u4e2a set\uff0c\u4fdd\u8bc1\u4e86\u5185\u90e8 value \u7684\u552f\u4e00\u6027\uff0c\u53e6\u4e00\u65b9\u9762\u5b83\u53ef\u4ee5\u4e3a\u6bcf\u4e2a value \u8d4b\u4e88\u4e00\u4e2a score \u503c\uff0c\u7528\u6765\u4ee3\u8868\u6392\u5e8f\u7684\u6743\u91cd\u3002<\/p>\n<p>\u5b83\u7684\u5185\u90e8\u5b9e\u73b0\u7528\u7684\u662f\u4e00\u79cd\u53eb\u505a \u300c\u8df3\u8dc3\u8868\u300d \u7684\u6570\u636e\u7ed3\u6784\uff0c\u7531\u4e8e\u6bd4\u8f83\u590d\u6742\uff0c\u6240\u4ee5\u5728\u8fd9\u91cc\u7b80\u5355\u63d0\u4e00\u4e0b\u539f\u7406\u5c31\u597d\u4e86\uff1a<\/p>\n<\/p>\n<p>\u60f3\u8c61\u4f60\u662f\u4e00\u5bb6\u521b\u4e1a\u516c\u53f8\u7684\u8001\u677f\uff0c\u521a\u5f00\u59cb\u53ea\u6709\u51e0\u4e2a\u4eba\uff0c\u5927\u5bb6\u90fd\u5e73\u8d77\u5e73\u5750\u3002\u540e\u6765\u968f\u7740\u516c\u53f8\u7684\u53d1\u5c55\uff0c\u4eba\u6570\u8d8a\u6765\u8d8a\u591a\uff0c\u56e2\u961f\u6c9f\u901a\u6210\u672c\u9010\u6e10\u589e\u52a0\uff0c\u6e10\u6e10\u5730\u5f15\u5165\u4e86\u7ec4\u957f\u5236\uff0c\u5bf9\u56e2\u961f\u8fdb\u884c\u5212\u5206\uff0c\u4e8e\u662f\u6709\u4e00\u4e9b\u4eba\u53c8\u662f\u5458\u5de5\u53c8\u6709\u7ec4\u957f\u7684\u8eab\u4efd\u3002<\/p>\n<p>\u518d\u540e\u6765\uff0c\u516c\u53f8\u89c4\u6a21\u8fdb\u4e00\u6b65\u6269\u5927\uff0c\u516c\u53f8\u9700\u8981\u518d\u8fdb\u5165\u4e00\u4e2a\u5c42\u7ea7\uff1a\u90e8\u95e8\u3002\u4e8e\u662f\u6bcf\u4e2a\u90e8\u95e8\u53c8\u4f1a\u4ece\u7ec4\u957f\u4e2d\u63a8\u4e3e\u4e00\u4f4d\u9009\u51fa\u90e8\u957f\u3002<\/p>\n<p>\u8df3\u8dc3\u8868\u5c31\u7c7b\u4f3c\u4e8e\u8fd9\u6837\u7684\u673a\u5236\uff0c\u6700\u4e0b\u9762\u4e00\u5c42\u6240\u6709\u7684\u5143\u7d20\u90fd\u4f1a\u4e32\u8d77\u6765\uff0c\u90fd\u662f\u5458\u5de5\uff0c\u7136\u540e\u6bcf\u9694\u51e0\u4e2a\u5143\u7d20\u5c31\u4f1a\u6311\u9009\u51fa\u4e00\u4e2a\u4ee3\u8868\uff0c\u518d\u628a\u8fd9\u51e0\u4e2a\u4ee3\u8868\u4f7f\u7528\u53e6\u5916\u4e00\u7ea7\u6307\u9488\u4e32\u8d77\u6765\u3002\u7136\u540e\u518d\u5728\u8fd9\u4e9b\u4ee3\u8868\u91cc\u9762\u6311\u51fa\u4e8c\u7ea7\u4ee3\u8868\uff0c\u518d\u4e32\u8d77\u6765\u3002\u6700\u7ec8\u5f62\u6210\u4e86\u4e00\u4e2a\u91d1\u5b57\u5854\u7684\u7ed3\u6784\u3002<\/p>\n<p>\u60f3\u4e00\u4e0b\u4f60\u76ee\u524d\u6240\u5728\u7684\u5730\u7406\u4f4d\u7f6e\uff1a\u4e9a\u6d32 &gt; \u4e2d\u56fd &gt; \u67d0\u7701 &gt; \u67d0\u5e02 &gt; &#8230;.\uff0c\u5c31\u662f\u8fd9\u6837\u4e00\u4e2a\u7ed3\u6784\uff01<\/p>\n<p><strong>\u6709\u5e8f\u5217\u8868 zset \u57fa\u7840\u64cd\u4f5c<\/strong>&nbsp;<\/p>\n<\/p>\n<ol>\n<li><span><span>&gt;<\/span><span>&nbsp;ZADD&nbsp;books&nbsp;9.0&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZADD&nbsp;books&nbsp;8.9&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZADD&nbsp;books&nbsp;8.6&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZRANGE&nbsp;books&nbsp;0&nbsp;-1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6309&nbsp;score&nbsp;\u6392\u5e8f\u5217\u51fa\uff0c\u53c2\u6570\u533a\u95f4\u4e3a\u6392\u540d\u8303\u56f4&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZREVRANGE&nbsp;books&nbsp;0&nbsp;-1&nbsp;&nbsp;#&nbsp;\u6309&nbsp;score&nbsp;\u9006\u5e8f\u5217\u51fa\uff0c\u53c2\u6570\u533a\u95f4\u4e3a\u6392\u540d\u8303\u56f4&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZCARD&nbsp;books&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u76f8\u5f53\u4e8e&nbsp;count()&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;3&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZSCORE&nbsp;books&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;&nbsp;&nbsp;#&nbsp;\u83b7\u53d6\u6307\u5b9a&nbsp;value&nbsp;\u7684&nbsp;score&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>&#8220;8.9000000000000004&#8221;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u5185\u90e8&nbsp;score&nbsp;\u4f7f\u7528&nbsp;double&nbsp;\u7c7b\u578b\u8fdb\u884c\u5b58\u50a8\uff0c\u6240\u4ee5\u5b58\u5728\u5c0f\u6570\u70b9\u7cbe\u5ea6\u95ee\u9898&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZRANK&nbsp;books&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6392\u540d&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZRANGEBYSCORE&nbsp;books&nbsp;0&nbsp;8.91&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u6839\u636e\u5206\u503c\u533a\u95f4\u904d\u5386&nbsp;zset&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZRANGEBYSCORE&nbsp;books&nbsp;-inf&nbsp;8.91&nbsp;withscores&nbsp;&nbsp;#&nbsp;\u6839\u636e\u5206\u503c\u533a\u95f4&nbsp;(-\u221e,&nbsp;8.91]&nbsp;\u904d\u5386&nbsp;zset\uff0c\u540c\u65f6\u8fd4\u56de\u5206\u503c\u3002inf&nbsp;\u4ee3\u8868&nbsp;infinite\uff0c\u65e0\u7a77\u5927\u7684\u610f\u601d\u3002&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;8.5999999999999996&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>3)&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>4)&nbsp;&#8220;8.9000000000000004&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZREM&nbsp;books&nbsp;&#8220;java&nbsp;concurrency&#8221;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#&nbsp;\u5220\u9664&nbsp;value&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>(integer)&nbsp;1&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span><span>&gt;<\/span><span>&nbsp;ZRANGE&nbsp;books&nbsp;0&nbsp;-1&nbsp;<\/span><\/span><span>&nbsp;<\/span><\/li>\n<li><span>1)&nbsp;&#8220;java&nbsp;cookbook&#8221;&nbsp;<\/span><span>&nbsp;<\/span><\/li>\n<li><span>2)&nbsp;&#8220;think&nbsp;in&nbsp;java&#8221;&nbsp;<\/span>&nbsp;<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Redis\u8be6\u7ec6\u4ecb\u7ecd\uff1a5\u79cd\u57fa\u672c\u6570\u636e&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201400","post","type-post","status-publish","format-standard","hentry","category-dat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