{"id":201800,"date":"2025-05-10T10:31:48","date_gmt":"2025-05-10T02:31:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201800\/"},"modified":"2025-05-10T10:31:48","modified_gmt":"2025-05-10T02:31:48","slug":"redis%e7%b1%bb%e5%9e%8btype%e4%b8%8e%e7%bc%96%e7%a0%81encoding%e5%8e%9f%e7%90%86%e5%8f%8a%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201800\/","title":{"rendered":"Redis\u7c7b\u578btype\u4e0e\u7f16\u7801encoding\u539f\u7406\u53ca\u4f7f\u7528\u793a\u4f8b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u7c7b\u578btype\u4e0e\u7f16\u7801encoding\u539f\u7406\u53ca\u4f7f\u7528\u793a\u4f8b<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u600e\u4e48\u5165\u95e8\u6570\u636e\u5e93\u7f16\u7a0b\uff1f\u9700\u8981\u5b66\u4e60\u54ea\u4e9b\u77e5\u8bc6\u70b9\uff1f\u8fd9\u662f\u65b0\u624b\u4eec\u521a\u63a5\u89e6\u7f16\u7a0b\u65f6\u5e38\u89c1\u7684\u95ee\u9898\uff1b\u4e0b\u9762golang\u5b66\u4e60\u7f51\u5c31\u6765\u7ed9\u5927\u5bb6\u6574\u7406\u5206\u4eab\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u591f\u7ed9\u521d\u5b66\u8005\u4e00\u4e9b\u5e2e\u52a9\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u4ecb\u7ecd\u300aRedis\u7c7b\u578btype\u4e0e\u7f16\u7801encoding\u539f\u7406\u53ca\u4f7f\u7528\u793a\u4f8b\u300b\uff0c\u6d89\u53ca\u5230type\u3001\u7f16\u7801\u3001Redis\u7c7b\u578b\u3001encoding\uff0c\u6709\u9700\u8981\u7684\u53ef\u4ee5\u6536\u85cf\u4e00\u4e0b<\/p>\n<h2>\u6458\u8981<\/h2>\n<p>Redis\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u9ad8\u6027\u80fdkey-value\u6570\u636e\u5e93\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u573a\u666f\u3002\u5728Redis\u4e2d\uff0c<strong>\u6570\u636e\u7c7b\u578b\uff08type\uff09\u548c\u7f16\u7801\uff08encoding\uff09<\/strong> \u662f\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002\u672c\u7bc7\u535a\u5ba2\u5c06\u8be6\u7ec6\u4ecb\u7ecdRedis\u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\u4ee5\u53ca\u76f8\u5e94\u7684\u7f16\u7801\u65b9\u5f0f\u548c\u5e95\u5c42\u5b9e\u73b0\u539f\u7406\u3002<\/p>\n<p>\u8981\u67e5\u770bRedis\u67d0\u4e2akey\u7684\u5185\u90e8\u7f16\u7801\uff0c\u53ef\u4ee5\u4f7f\u7528Redis\u547d\u4ee4<code>OBJECT ENCODING key<\/code>\u3002\u5176\u4e2d\uff0c<code>key<\/code>\u662f\u4f60\u60f3\u8981\u67e5\u8be2\u7684\u952e\u540d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8981\u67e5\u8be2\u540d\u4e3a<code>mykey<\/code>\u7684\u952e\u7684\u5185\u90e8\u7f16\u7801\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre>127.0.0.1:6379&gt; object encoding mykey  \/\/ \u67e5\u770b\u67d0\u4e2aRedis\u952e\u503c\u7684\u7f16\u7801\n<\/pre>\n<h2>redisObject<\/h2>\n<p>\u5728 Redis \u4e2d\uff0credisObject \u662f Redis \u4e2d\u6700\u57fa\u672c\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002redisObject \u7528\u4e8e\u8868\u793a Redis \u4e2d\u7684\u952e\u503c\u5bf9\u4e2d\u7684\u503c\uff0c\u5b83\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\u3001\u6574\u6570\u3001\u5217\u8868\u3001\u54c8\u5e0c\u8868\u7b49\u4efb\u610f\u4e00\u79cd Redis \u6570\u636e\u7c7b\u578b\u3002<\/p>\n<p>redisObject \u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n<pre>typedef struct redisObject {\n    \/\/ \u7c7b\u578b\n    unsigned type:4;\n\n    \/\/ \u7f16\u7801\u65b9\u5f0f\n    unsigned encoding:4;\n\n    \/\/ \u5f15\u7528\u8ba1\u6570\n    int refcount;\n\n    \/\/ \u6307\u5411\u5b9e\u9645\u503c\u7684\u6307\u9488\n    void *ptr;\n\n} robj;\n<\/pre>\n<ul>\n<li>type\uff1a\u8868\u793a redisObject \u7684\u7c7b\u578b\u3002<\/li>\n<li>encoding\uff1a\u8868\u793a redisObject \u7684\u7f16\u7801\u65b9\u5f0f\u3002<\/li>\n<li>refcount\uff1a\u8868\u793a\u5f53\u524d redisObject \u88ab\u5f15\u7528\u7684\u6b21\u6570\u3002<\/li>\n<li>ptr\uff1a ptr\u5b57\u6bb5\u5219\u662f\u4e00\u4e2a\u6307\u9488\uff0c\u6307\u5411\u5b9e\u9645\u7684 Redis \u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p>Redis\u6e90\u7801encoding\u53d6\u503c\u6709\u5982\u4e0b\u51e0\u79cd\uff1a<\/p>\n<pre>#define OBJ_ENCODING_RAW 0        \/* Raw representation *\/\n#define OBJ_ENCODING_INT 1        \/* Encoded as integer *\/\n#define OBJ_ENCODING_HT 2         \/* Encoded as hash table *\/\n#define OBJ_ENCODING_ZIPMAP 3     \/* Encoded as zipmap *\/\n#define OBJ_ENCODING_LINKEDLIST 4 \/* No longer used: old list encoding. *\/\n#define OBJ_ENCODING_ZIPLIST 5    \/* Encoded as ziplist *\/\n#define OBJ_ENCODING_INTSET 6     \/* Encoded as intset *\/\n#define OBJ_ENCODING_SKIPLIST 7   \/* Encoded as skiplist *\/\n#define OBJ_ENCODING_EMBSTR 8     \/* Embedded sds string encoding *\/\n#define OBJ_ENCODING_QUICKLIST 9  \/* Encoded as linked list of ziplists *\/\n<\/pre>\n<h2>\u7c7b\u578b\u4e0e\u7f16\u7801\u4ecb\u7ecd<\/h2>\n<p>Redis\u652f\u6301\u4e94\u79cd\u4e3b\u8981\u7684\u6570\u636e\u7c7b\u578b\uff1a\u5b57\u7b26\u4e32(string)\u3001\u5217\u8868(list)\u3001\u96c6\u5408(set)\u3001\u6709\u5e8f\u96c6\u5408(sorted set)\u548c\u54c8\u5e0c(hash)\u3002\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u90fd\u6709\u5bf9\u5e94\u7684\u7f16\u7801\u65b9\u5f0f\u3002<\/p>\n<p>\u6570\u636e\u7c7b\u578b\u4e0e\u7f16\u7801\u65b9\u5f0f\u603b\u89c8\u5982\u4e0b\uff1a<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u6570\u636e\u7c7b\u578b<\/th>\n<th>\u7f16\u7801\u65b9\u5f0f<\/th>\n<\/tr>\n<tr>\n<td>\u5b57\u7b26\u4e32<\/td>\n<td>int\u3001embstr\u3001raw<\/td>\n<\/tr>\n<tr>\n<td>\u54c8\u5e0c\u8868<\/td>\n<td>ziplist\u3001hashtable<\/td>\n<\/tr>\n<tr>\n<td>\u5217\u8868<\/td>\n<td>ziplist\u3001linkedlist\u3001quicklist<\/td>\n<\/tr>\n<tr>\n<td>\u96c6\u5408<\/td>\n<td>intset\u3001hashtable<\/td>\n<\/tr>\n<tr>\n<td>\u6709\u5e8f\u96c6\u5408<\/td>\n<td>ziplist\u3001skiplist<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u5b57\u7b26\u4e32<\/h3>\n<p>\u5b57\u7b26\u4e32\u662fRedis\u4e2d\u6700\u57fa\u672c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u901a\u5e38\u7528\u4e8e\u5b58\u50a8\u6587\u672c\u6216\u4e8c\u8fdb\u5236\u6570\u636e\u3002Redis\u652f\u6301\u4e24\u79cd\u7f16\u7801\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li>int\uff1a\u5f53\u5b57\u7b26\u4e32\u53ef\u4ee5\u8868\u793a\u4e3a\u6574\u6570\u65f6\uff0cRedis\u4f1a\u5c06\u5176\u8f6c\u6362\u4e3a\u6574\u6570\uff0c\u5e76\u91c7\u7528int\u7f16\u7801\u65b9\u5f0f\u5b58\u50a8\u3002int\u7f16\u7801\u65b9\u5f0f\u7684\u4f18\u70b9\u662f\u5b58\u50a8\u7a7a\u95f4\u5c0f\uff0c\u64cd\u4f5c\u6548\u7387\u9ad8\u3002\u7f3a\u70b9\u662f\u53ea\u80fd\u5b58\u50a8\u6574\u6570\uff0c\u4e0d\u652f\u6301\u5b57\u7b26\u4e32\u64cd\u4f5c\u3002<\/li>\n<li>embstr(embstr-encoded string)\uff1a<strong>\u4fdd\u5b58\u957f\u5ea6\u5c0f\u4e8e44\u5b57\u8282\u7684\u5b57\u7b26\u4e32<\/strong>\uff0c\u5f53\u4e00\u4e2a\u5b57\u7b26\u4e32\u6bd4\u8f83\u77ed\uff0c\u91c7\u7528\u6b64\u7f16\u7801\u65b9\u5f0f\u5b58\u50a8\uff0c\u53ef\u4ee5\u51cf\u5c11\u5185\u5b58\u5360\u7528\u3002<\/li>\n<li>raw(raw-encoded string)\uff1a<strong>\u4fdd\u5b58\u957f\u5ea6\u5927\u4e8e44\u5b57\u8282\u7684\u5b57\u7b26\u4e32<\/strong>\uff0c\u5f53\u4e00\u4e2a\u5b57\u7b26\u4e32\u6bd4\u8f83\u957f\u65f6\uff0c\u91c7\u7528\u6b64\u7f16\u7801\u65b9\u5f0f\u5b58\u50a8\u3002<\/li>\n<\/ul>\n<h3>\u5217\u8868<\/h3>\n<p>\u5217\u8868\u662f\u4e00\u7cfb\u5217\u6709\u5e8f\u7684\u5b57\u7b26\u4e32\u96c6\u5408\uff0c\u53ef\u4ee5\u6dfb\u52a0\u3001\u4fee\u6539\u548c\u5220\u9664\u5143\u7d20\u3002Redis\u652f\u6301\u4e09\u79cd\u7f16\u7801\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li>ziplist\uff1a\u5728Redis3.2\u7248\u672c\u4e4b\u524d\uff0c<strong>\u5f53List\u5217\u8868\u4e2d\u6bcf\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u90fd\u5c0f\u4e8e64\u5b57\u8282\u5e76\u4e14List\u5217\u8868\u4e2d\u5143\u7d20\u6570\u91cf\u5c0f\u4e8e512\u4e2a\u65f6<\/strong>\uff0cList\u5bf9\u8c61\u4f7f\u7528ziplist\u7f16\u7801\uff0c\u5176\u4ed6\u60c5\u51b5\u4f7f\u7528linkedlist\u7f16\u7801\u3002ziplist\u662f\u4e00\u79cd\u7d27\u51d1\u7684\u3001\u538b\u7f29\u7684\u5217\u8868\u7ed3\u6784\uff0c\u53ef\u4ee5\u8282\u7701\u5185\u5b58\u3002\u9002\u7528\u4e8e\u5c0f\u578b\u5217\u8868\u3002<\/li>\n<li>linkedlist\uff1alinkedlist\u662f\u4e00\u79cd\u94fe\u8868\u7ed3\u6784\uff0c\u652f\u6301\u4efb\u610f\u5927\u5c0f\u7684\u5217\u8868\u3002\u4f46\u5176\u5185\u5b58\u5360\u7528\u4f1a\u968f\u7740\u5217\u8868\u957f\u5ea6\u7684\u589e\u52a0\u800c\u589e\u52a0\u3002<\/li>\n<li>quicklist\uff1a<strong>Redis 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