{"id":486,"date":"2013-09-22T22:27:45","date_gmt":"2013-09-22T14:27:45","guid":{"rendered":"http:\/\/coderbee.net\/?p=486"},"modified":"2013-09-22T22:28:04","modified_gmt":"2013-09-22T14:28:04","slug":"redis-rdb-dump-file-format-%e4%b8%ad%e6%96%87%e7%bf%bb%e8%af%91","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/open-source\/20130922\/486","title":{"rendered":"Redis-RDB-Dump-File-Format \u4e2d\u6587\u7ffb\u8bd1"},"content":{"rendered":"<p>\u4eca\u5e74\u5e74\u521d\u7ffb\u8bd1\u7684\uff0c\u90fd\u5fd8\u5f97\u5dee\u4e0d\u591a\u4e86\uff0c\u6700\u8fd1\u60f3\u7528Go\u5199\u4e2a\u7a0b\u5e8f\u89e3\u6790RDB\u6587\u4ef6\uff0c\u91cd\u65b0\u7ffb\u51fa\u6765\u3002<\/p>\n<p>\u7ffb\u8bd1\u81ea\uff1a<br \/>\n<a href=\"https:\/\/github.com\/sripathikrishnan\/redis-rdb-tools\/wiki\/Redis-RDB-Dump-File-Format\">https:\/\/github.com\/sripathikrishnan\/redis-rdb-tools\/wiki\/Redis-RDB-Dump-File-Format<\/a><\/p>\n<p>\u5982\u679c\u5bf9\u672c\u6587\u6863\u7684\u540e\u7eed\u66f4\u65b0\u6709\u5174\u8da3\uff0c\u53ef\u5173\u6ce8\uff1a<a href=\"https:\/\/github.com\/wen866595\/open-doc\">https:\/\/github.com\/wen866595\/open-doc<\/a><\/p>\n<h1>Redis RDB \u6587\u4ef6\u683c\u5f0f<\/h1>\n<p>Redis *.rdb \u6587\u4ef6\u662f\u4e00\u4e2a\u5185\u5b58\u5185\u5b58\u50a8\u7684\u4e8c\u8fdb\u5236\u8868\u793a\u6cd5\u3002\u8fd9\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u8db3\u4ee5\u5b8c\u5168\u6062\u590dRedis\u7684\u72b6\u6001\u3002<\/p>\n<p>rdb\u6587\u4ef6\u683c\u5f0f\u4e3a\u5feb\u901f\u8bfb\u548c\u5199\u4f18\u5316\u3002LZF\u538b\u7f29\u53ef\u4ee5\u7528\u6765\u51cf\u5c11\u6587\u4ef6\u5927\u5c0f\u3002\u901a\u5e38\uff0c\u5bf9\u8c61\u524d\u9762\u6709\u5b83\u4eec\u7684\u957f\u5ea6\uff0c<br \/>\n\u8fd9\u6837\uff0c\u5728\u8bfb\u53d6\u5bf9\u8c61\u4e4b\u524d\uff0c\u4f60\u53ef\u4ee5\u51c6\u786e\u5730\u5206\u914d\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n<p>\u4e3a\u5feb\u901f\u8bfb\/\u5199\u4f18\u5316\u610f\u5473\u7740\u78c1\u76d8\u4e0a\u7684\u683c\u5f0f\u5e94\u8be5\u5c3d\u53ef\u80fd\u63a5\u8fd1\u4e8e\u5728\u5185\u5b58\u91cc\u7684\u8868\u793a\u6cd5\u3002\u8fd9\u79cd\u65b9\u5f0f\u6b63\u662frdb\u6587\u4ef6\u91c7\u7528\u7684\u3002<br \/>\n\u5bfc\u81f4\u7684\u7ed3\u679c\u662f\uff0c\u5728\u4e0d\u4e86\u89e3Redis\u5728\u5185\u5b58\u91cc\u8868\u793a\u6570\u636e\u7684\u6570\u636e\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\uff0c\u4f60\u6ca1\u6cd5\u89e3\u6790rdb\u6587\u4ef6\u3002<\/p>\n<h2>\u89e3\u6790RDB\u7684\u9ad8\u5c42\u7b97\u6cd5<\/h2>\n<p>\u5728\u9ad8\u5c42\u5c42\u9762\u770b\uff0cRDB\u6587\u4ef6\u6709\u4e0b\u9762\u7684\u683c\u5f0f\uff1a<\/p>\n<pre><code>\n----------------------------# RDB \u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002\u6587\u4ef6\u91cc\u6ca1\u6709\u65b0\u884c\u6216\u7a7a\u683c\u3002\n52 45 44 49 53              # \u9b54\u672f\u5b57\u7b26\u4e32 \"REDIS\"\n00 00 00 03                 # RDB \u7248\u672c\u53f7\uff0c\u9ad8\u4f4d\u4f18\u5148\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7248\u672c\u662f 0003 = 3\n----------------------------\nFE 00                       # FE = code \u6307\u51fa\u6570\u636e\u5e93\u9009\u62e9\u5668. \u6570\u636e\u5e93\u53f7 = 00\n----------------------------# \u952e\u503c\u5bf9\u5f00\u59cb\nFD $unsigned int            # FD \u6307\u51fa \"\u6709\u6548\u671f\u9650\u65f6\u95f4\u662f\u79d2\u4e3a\u5355\u4f4d\". \u5728\u8fd9\u4e4b\u540e\uff0c\u8bfb\u53d64\u5b57\u8282\u65e0\u7b26\u53f7\u6574\u6570\u4f5c\u4e3a\u6709\u6548\u671f\u9650\u65f6\u95f4\u3002\n$value-type                 # 1 \u5b57\u8282\u6807\u8bb0\u6307\u51fa\u503c\u7684\u7c7b\u578b \uff0d set\uff0cmap\uff0csorted set \u7b49\u3002\n$string-encoded-key         # \u952e\uff0c\u7f16\u7801\u4e3a\u4e00\u4e2aredis\u5b57\u7b26\u4e32\u3002\n$encoded-value              # \u503c\uff0c\u7f16\u7801\u53d6\u51b3\u4e8e $value-type.\n----------------------------\nFC $unsigned long           # FC \u6307\u51fa \"\u6709\u6548\u671f\u9650\u65f6\u95f4\u662f\u8c6a\u79d2\u4e3a\u5355\u4f4d\". \u5728\u8fd9\u4e4b\u540e\uff0c\u8bfb\u53d68\u5b57\u8282\u65e0\u7b26\u53f7\u957f\u6574\u6570\u4f5c\u4e3a\u6709\u6548\u671f\u9650\u65f6\u95f4\u3002\n$value-type                 # 1 \u5b57\u8282\u6807\u8bb0\u6307\u51fa\u503c\u7684\u7c7b\u578b \uff0d set\uff0cmap\uff0csorted set \u7b49\u3002\n$string-encoded-key         # \u952e\uff0c\u7f16\u7801\u4e3a\u4e00\u4e2aredis\u5b57\u7b26\u4e32\u3002\n$encoded-value              # \u503c\uff0c\u7f16\u7801\u53d6\u51b3\u4e8e $value-type.\n----------------------------\n$value-type                 # \u8fd9\u4e2a\u952e\u503c\u5bf9\u6ca1\u6709\u6709\u6548\u671f\u9650\u3002$value_type \u4fdd\u8bc1 != to FD, FC, FE and FF\n$string-encoded-key\n$encoded-value\n----------------------------\nFE $length-encoding         # \u524d\u4e00\u4e2a\u6570\u636e\u5e93\u7ed3\u675f\uff0c\u4e0b\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u59cb\u3002\u6570\u636e\u5e93\u53f7\u7528\u957f\u5ea6\u7f16\u7801\u8bfb\u53d6\u3002\n----------------------------\n...                         # \u8fd9\u4e2a\u6570\u636e\u5e93\u7684\u952e\u503c\u5bf9\uff0c\u53e6\u5916\u7684\u6570\u636e\u5e93\u3002\nFF                          ## RDB \u6587\u4ef6\u7ed3\u675f\u6307\u793a\u5668\n8 byte checksum             ## \u6574\u4e2a\u6587\u4ef6\u7684 CRC 32 \u6821\u9a8c\u548c\u3002\n<\/code><\/pre>\n<p><!--more--><\/p>\n<h3>\u9b54\u672f\u6570<\/h3>\n<p>\u6587\u4ef6\u5f00\u59cb\u4e8e\u9b54\u672f\u5b57\u7b26\u4e32\u201cREDIS\u201d\u3002\u8fd9\u662f\u4e00\u4e2a\u5feb\u901f\u660e\u667a\u7684\u68c0\u67e5\u662f\u5426\u6b63\u5728\u5904\u7406\u4e00\u4e2aredis rdb\u6587\u4ef6\u3002<br \/>\n    52 45 44 49 53 # &#8220;REDIS&#8221;<\/p>\n<h3>RDB \u7248\u672c\u53f7<\/h3>\n<p>\u63a5\u4e0b\u67654\u4e2a\u5b57\u8282\u5b58\u50a8\u4e86rdb\u683c\u5f0f\u7684\u7248\u672c\u53f7\u3002\u8fd94\u4e2a\u5b57\u8282\u89e3\u91ca\u4e3aascii\u5b57\u7b26\uff0c\u7136\u540e\u4f7f\u7528\u5b57\u7b26\u4e32\u5230\u6574\u6570\u7684\u8f6c\u6362\u6cd5\u8f6c\u6362\u4e3a\u4e00\u4e2a\u6574\u6570\u3002<br \/>\n    00 00 00 03 # Version = 3<\/p>\n<h3>\u6570\u636e\u5e93\u9009\u62e9\u5668<\/h3>\n<p>\u4e00\u4e2aRedis\u5b9e\u4f8b\u53ef\u4ee5\u6709\u591a\u4e2a\u6570\u636e\u5e93\u3002<br \/>\n\u5355\u4e00\u5b57\u82820xFE\u6807\u8bb0\u6570\u636e\u5e93\u9009\u62e9\u5668\u7684\u5f00\u59cb\u3002\u5728\u8fd9\u4e2a\u5b57\u8282\u4e4b\u540e\uff0c\u4e00\u4e2a\u53ef\u53d8\u957f\u5ea6\u7684\u5b57\u6bb5\u6307\u51fa\u6570\u636e\u5e93\u5e8f\u53f7\u3002<br \/>\n\u89c1\u201c\u957f\u5ea6\u7f16\u7801\u201d\u7ae0\u8282\u6765\u4e86\u89e3\u5982\u4f55\u8bfb\u53d6\u6570\u636e\u5e93\u5e8f\u53f7\u3002<\/p>\n<h3>\u952e\u503c\u5bf9<\/h3>\n<p>\u5728\u6570\u636e\u5e93\u9009\u62e9\u5668\u4e4b\u540e\uff0c\u6587\u4ef6\u5305\u542b\u4e86\u4e00\u5e8f\u5217\u7684\u952e\u503c\u5bf9\u3002<\/p>\n<p>\u6bcf\u4e2a\u952e\u503c\u5bf9\u67094\u90e8\u5206\uff1a<\/p>\n<blockquote>\n<ol>\n<li>\u952e\u4fdd\u5b58\u671f\u9650\u65f6\u95f4\u6233\u3002\u8fd9\u662f\u53ef\u9009\u7684\u3002<\/li>\n<li>\u4e00\u4e2a\u5b57\u8282\u6807\u8bb0\u503c\u7684\u7c7b\u578b\u3002<\/li>\n<li>\u952e\u7f16\u7801\u4e3aRedis \u5b57\u7b26\u4e32\u3002\u89c1\u201cRedis \u5b57\u7b26\u4e32\u7f16\u7801\u201d\u3002<\/li>\n<li>\u503c\u6839\u636e\u503c\u7c7b\u578b\u8fdb\u884c\u7f16\u7801\u3002\u89c1\u201cRedis \u503c\u7f16\u7801\u201d\u3002<\/li>\n<\/ol>\n<\/blockquote>\n<h4>\u952e\u4fdd\u5b58\u671f\u9650\u65f6\u95f4\u6233<\/h4>\n<p>\u8fd9\u4e2a\u533a\u5757\u5f00\u59cb\u4e8e\u4e00\u5b57\u8282\u6807\u8bb0\u3002\u503cFD\u6307\u51fa\u4fdd\u5b58\u671f\u9650\u662f\u4ee5\u79d2\u4e3a\u5355\u4f4d\u6307\u5b9a\u3002\u503cFC\u6307\u51fa\u6709\u6548\u671f\u9650\u662f\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u6307\u5b9a\u3002<\/p>\n<p>\u5982\u679c\u65f6\u95f4\u6307\u5b9a\u4e3a\u6beb\u79d2\uff0c\u63a5\u4e0b\u67658\u4e2a\u5b57\u8282\u8868\u793aunix\u65f6\u95f4\u3002\u8fd9\u4e2a\u6570\u5b57\u662funix\u65f6\u95f4\u6233\uff0c\u7cbe\u786e\u5230\u79d2\u6216\u6beb\u79d2\uff0c\u8868\u793a\u8fd9\u4e2a\u952e\u7684\u6709\u6548\u671f\u9650\u3002<\/p>\n<p>\u6570\u5b57\u5982\u4f55\u7f16\u7801\u89c1\u201cRedis \u957f\u5ea6\u7f16\u7801\u201d\u7ae0\u8282\u3002<\/p>\n<p>\u5728\u5bfc\u5165\u8fc7\u7a0b\u4e2d\uff0c\u5df2\u7ecf\u8fc7\u671f\u7684\u952e\u5c06\u5fc5\u987b\u4e22\u5f03\u3002<\/p>\n<h4>\u503c\u7c7b\u578b<\/h4>\n<p>\u4e00\u4e2a\u5b57\u8282\u6807\u8bb0\u6307\u793a\u7528\u4e8e\u4fdd\u5b58\u503c\u7684\u7f16\u7801\u3002<\/p>\n<blockquote>\n<ol>\n<li>0 \uff1d \u201cString \u7f16\u7801\u201d<\/li>\n<li>1 \uff1d \u201c List \u7f16\u7801\u201d<\/li>\n<li>2 \uff1d \u201cSet \u7f16\u7801\u201d<\/li>\n<li>3 \uff1d \u201cSorted Set \u7f16\u7801\u201d<\/li>\n<li>4 \uff1d \u201cHash \u7f16\u7801\u201d<\/li>\n<li>9 \uff1d \u201cZipmap \u7f16\u7801\u201d<\/li>\n<li>10 \uff1d \u201cZiplist \u7f16\u7801\u201d<\/li>\n<li>11 \uff1d \u201cIntSet \u7f16\u7801\u201d<\/li>\n<li>12 \uff1d \u201c\u4ee5 Ziplist \u7f16\u7801\u7684 Sorted Set\u201d<\/li>\n<li>13 \uff1d \u201c\u4ee5 Ziplist \u7f16\u7801\u7684 Hashmap\u201d \uff08\u5728rdb\u7248\u672c4\u4e2d\u5f15\u5165\uff09<\/li>\n<\/ol>\n<\/blockquote>\n<h4>\u952e<\/h4>\n<p>\u952e\u7b80\u5355\u5730\u7f16\u7801\u4e3aRedis\u5b57\u7b26\u4e32\u3002\u89c1\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u7ae0\u8282\u4e86\u89e3\u952e\u5982\u4f55\u88ab\u7f16\u7801\u3002<\/p>\n<h4>\u503c<\/h4>\n<p>\u503c\u7684\u7f16\u7801\u53d6\u51b3\u4e8e\u503c\u7c7b\u578b\u6807\u8bb0\u3002<\/p>\n<ul>\n<li>\u5f53\u503c\u7c7b\u578b \uff1d 0\uff0c\u503c\u662f\u7b80\u5355\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u5f53\u503c\u7c7b\u578b\u662f 9\uff0c 10\uff0c 11 \u6216 12 \u4e2d\u7684\u4e00\u4e2a\uff0c\u503c\u88ab\u5305\u88c5\u4e3a\u5b57\u7b26\u4e32\u3002\u8bfb\u53d6\u5b57\u7b26\u4e32\u540e\uff0c\u5b83\u5fc5\u987b\u8fdb\u4e00\u6b65\u89e3\u6790\u3002<\/li>\n<li>\u5f53\u503c\u7c7b\u578b\u662f1\uff0c2\uff0c3 \u6216 4 \u4e2d\u7684\u4e00\u4e2a\uff0c\u503c\u662f\u4e00\u5e8f\u5217\u5b57\u7b26\u4e32\u3002\u8fd9\u4e2a\u5e8f\u5217\u5b57\u7b26\u4e32\u7528\u4e8e\u6784\u9020list\uff0cset\uff0csorted set\u6216hashmap\u3002<\/li>\n<\/ul>\n<h2>\u957f\u5ea6\u7f16\u7801<\/h2>\n<p>\u957f\u5ea6\u7f16\u7801\u7528\u4e8e\u5b58\u50a8\u6d41\u4e2d\u63a5\u4e0b\u6765\u5bf9\u8c61\u7684\u957f\u5ea6\u3002\u957f\u5ea6\u7f16\u7801\u662f\u4e00\u4e2a\u6309\u7684\u5b57\u8282\u7f16\u7801\uff0c\u4e3a\u5c3d\u53ef\u80fd\u5c11\u7528\u5b57\u8282\u800c\u8bbe\u8ba1\u3002<\/p>\n<p>\u8fd9\u662f\u957f\u5ea6\u7f16\u7801\u5982\u4f55\u5de5\u4f5c\uff1a<\/p>\n<blockquote>\n<ol>\n<li>\u4ece\u6d41\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u5b57\u8282\uff0c\u6700\u9ad8\u4e24bit\u88ab\u8bfb\u53d6<\/li>\n<li>\u5982\u679c\u5f00\u59cbbit\u662f 00 \uff0c\u63a5\u4e0b\u67656bit \u8868\u793a\u957f\u5ea6<\/li>\n<li>\u5982\u679c\u5f00\u59cbbit\u662f 01\uff0c\u4ece\u6d41\u518d\u8bfb\u53d6\u989d\u5916\u4e00\u4e2a\u5b57\u8282\u3002\u8fd9\u7ec4\u5408\u7684\u768414bit\u8868\u793a\u957f\u5ea6<\/li>\n<li>\u5982\u679c\u5f00\u59cbbit\u662f 10\uff0c\u90a3\u4e48\u5269\u4f59\u76846bit\u4e22\u5f03\uff0c\u4ece\u6d41\u4e2d\u8bfb\u53d6\u989d\u5916\u76844\u5b57\u8282\uff0c\u8fd94\u4e2a\u5b57\u8282\u8868\u793a\u957f\u5ea6<\/li>\n<li>\u5982\u679c\u5f00\u59cbbit\u662f 11\uff0c\u90a3\u4e48\u63a5\u4e0b\u6765\u7684\u5bf9\u8c61\u662f\u4ee5\u7279\u6b8a\u683c\u5f0f\u7f16\u7801\u7684\u3002\u5269\u4f596bit\u6307\u793a\u683c\u5f0f\u3002\u8fd9\u79cd\u7f16\u7801\u901a\u5e38\u7528\u4e8e\u628a\u6570\u5b57\u4f5c\u4e3a\u5b57\u7b26\u4e32\u5b58\u50a8<br \/>\n      \u6216\u5b58\u50a8\u7f16\u7801\u540e\u7684\u5b57\u7b26\u4e32\u3002\u89c1\u5b57\u7b26\u4e32\u7f16\u7801<\/li>\n<\/ol>\n<\/blockquote>\n<p>\u4f5c\u4e3a\u8fd9\u79cd\u7f16\u7801\u7684\u7ed3\u679c\uff1a<\/p>\n<blockquote>\n<ol>\n<li>\u6570\u5b57 [0 &#8211; 63] \u53ef\u4ee5\u57281\u4e2a\u5b57\u8282\u91cc\u5b58\u50a8<\/li>\n<li>\u6570\u5b57 [0 &#8211; 16383] \u53ef\u4ee5\u57282\u4e2a\u5b57\u8282\u91cc\u5b58\u50a8<\/li>\n<li>\u6570\u5b57 [0 &#8211; (2^32 &#8211; 1)] \u53ef\u4ee5\u57284\u4e2a\u5b57\u8282\u91cc\u5b58\u50a8<\/li>\n<\/ol>\n<\/blockquote>\n<h2>\u5b57\u7b26\u4e32\u7f16\u7801<\/h2>\n<p>Redis\u5b57\u7b26\u4e32\u662f\u4e8c\u8fdb\u5236\u5b89\u5168\u7684\uff0d\uff0d\u8fd9\u610f\u5473\u7740\u4f60\u53ef\u4ee5\u5728\u8fd9\u91cc\u5b58\u50a8\u4efb\u4f55\u4e1c\u897f\u3002\u5b83\u4eec\u6ca1\u6709\u4efb\u4f55\u7279\u6b8a\u7684\u5b57\u7b26\u4e32\u7ed3\u675f\u8bb0\u53f7\u3002<br \/>\n\u6700\u597d\u8ba4\u4e3aRedis\u5b57\u7b26\u4e32\u662f\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4\u3002<\/p>\n<p>Redis\u91cc\u6709\u4e09\u79cd\u7c7b\u578b\u7684\u5b57\u7b26\u4e32\uff1a<\/p>\n<blockquote>\n<ol>\n<li>\u957f\u5ea6\u524d\u7f00\u5b57\u7b26\u4e32<\/li>\n<li>\u4e00\u4e2a8\uff0c16\u621632bit\u6574\u6570<\/li>\n<li>LZF\u538b\u7f29\u7684\u5b57\u7b26\u4e32<\/li>\n<\/ol>\n<\/blockquote>\n<h4>\u957f\u5ea6\u524d\u7f00\u5b57\u7b26\u4e32<\/h4>\n<p>\u957f\u5ea6\u524d\u7f6e\u5b57\u7b26\u4e32\u662f\u5f88\u7b80\u5355\u7684\u3002\u5b57\u7b26\u4e32\u5b57\u8282\u7684\u957f\u5ea6\u9996\u5148\u7f16\u7801\u4e3a\u201c\u957f\u5ea6\u7f16\u7801\u201d\uff0c\u5728\u8fd9\u4e4b\u540e\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u539f\u59cb\u5b57\u8282\u3002<\/p>\n<h4>\u6574\u6570\u4f5c\u4e3a\u5b57\u7b26\u4e32<\/h4>\n<p>\u9996\u5148\u8bfb\u53d6\u201c\u957f\u5ea6\u7f16\u7801\u201d\u5757\uff0c\u7279\u522b\u662f\u7b2c\u4e00\u4e2a\u4e24bit\u662f 11\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8bfb\u53d6\u5269\u4f59\u76846bit\u3002\u5982\u679c\u8fd96bit\u7684\u503c\u662f\uff1a<\/p>\n<blockquote>\n<ol>\n<li>0 \u8868\u793a\u63a5\u4e0b\u6765\u662f8bit\u6574\u6570<\/li>\n<li>1 \u8868\u793a\u63a5\u4e0b\u6765\u662f16bit\u6574\u6570<\/li>\n<li>2 \u8868\u793a\u63a5\u4e0b\u6765\u662f32bit\u6574\u6570<\/li>\n<\/ol>\n<\/blockquote>\n<h4>\u538b\u7f29\u5b57\u7b26\u4e32<\/h4>\n<p>\u9996\u5148\u8bfb\u53d6\u201c\u957f\u5ea6\u7f16\u7801\u201d\uff0c\u7279\u522b\u662f\u7b2c\u4e00\u4e2a\u4e24bit\u662f 11. \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8bfb\u53d6\u5269\u4f596bit\u3002\u5982\u679c\u8fd96bit\u503c\u662f4\uff0c\u5b83\u8868\u793a\u63a5\u4e0b\u6765\u662f\u4e00\u4e2a\u538b\u7f29\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u538b\u7f29\u5b57\u7b26\u4e32\u6309\u5982\u4e0b\u8bfb\u53d6\uff1a<\/p>\n<blockquote>\n<ol>\n<li>\u4ece\u6d41\u4e2d\u8bfb\u53d6\u538b\u7f29\u540e\u7684\u957f\u5ea6clen\uff0c\u6309\u201c\u957f\u5ea6\u7f16\u7801\u201d<\/li>\n<li>\u4ece\u6d41\u4e2d\u8bfb\u53d6\u672a\u538b\u7f29\u957f\u5ea6\uff0c\u6309\u201c\u957f\u5ea6\u7f16\u7801\u201d<\/li>\n<li>\u63a5\u4e0b\u6765\u4ece\u6d41\u4e2d\u8bfb\u53d6clen\u4e2a\u5b57\u8282<\/li>\n<li>\u6700\u540e\uff0c\u8fd9\u4e9b\u5b57\u8282\u6309LZF\u7b97\u6cd5\u89e3\u538b<\/li>\n<\/ol>\n<\/blockquote>\n<h2>List \u7f16\u7801<\/h2>\n<p>\u4e00\u4e2aRedis list \u8868\u793a\u4e3a\u4e00\u5e8f\u5217\u5b57\u7b26\u4e32\u3002<\/p>\n<blockquote>\n<ol>\n<li>\u9996\u5148\uff0c\u4ece\u6d41\u4e2d\u8bfb\u53d6list\u5927\u5c0fsize\uff0c\u6309\u201c\u957f\u5ea6\u7f16\u7801\u201d<\/li>\n<li>\u7136\u540e\uff0csize\u4e2a\u5b57\u7b26\u4e32\u4ece\u6d41\u4e2d\u8bfb\u53d6\uff0c\u6309\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d<\/li>\n<li>\u4f7f\u7528\u8fd9\u4e9b\u5b57\u7b26\u4e32\u91cd\u65b0\u6784\u5efalist<\/li>\n<\/ol>\n<\/blockquote>\n<h2>Set \u7f16\u7801<\/h2>\n<p>Set \u7f16\u7801\u4e0elist\u5b8c\u5168\u7c7b\u4f3c\u3002<\/p>\n<h2>Sorted Set \u7f16\u7801<\/h2>\n<blockquote>\n<ol>\n<li>\u9996\u5148\uff0c\u4ece\u6d41\u4e2d\u8bfb\u53d6sorted set\u5927\u5c0fsize\uff0c\u6309\u201c\u957f\u5ea6\u7f16\u7801\u201d<\/li>\n<li>TODO<\/li>\n<\/ol>\n<\/blockquote>\n<h2>Hash \u7f16\u7801<\/h2>\n<blockquote>\n<ol>\n<li>\u9996\u5148\uff0c\u4ece\u6d41\u4e2d\u8bfb\u53d6hash\u5927\u5c0fsize\uff0c\u6309\u201c\u957f\u5ea6\u7f16\u7801\u201d<\/li>\n<li>\u4e0b\u4e00\u6b65\uff0c\u4ece\u6d41\u4e2d\u8bfb\u53d6 2 * size \u4e2a\u5b57\u7b26\u4e32\uff0c\u6309\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d<\/li>\n<li>\u4ea4\u66ff\u7684\u5b57\u7b26\u4e32\u662f\u952e\u548c\u503c<\/li>\n<li>\u4f8b\u5982\uff0c2 us washington india delhi \u8868\u793amap {&#8220;us&#8221; => &#8220;washington&#8221;, &#8220;india&#8221; => &#8220;dlhi&#8221;}<\/li>\n<\/ol>\n<\/blockquote>\n<h2>Zipmap \u7f16\u7801<\/h2>\n<p><em>\u6ce8\u610f\uff1aZipmap\u7f16\u7801\u4eceRedis 2.6\u5f00\u59cb\u5df2\u5f03\u7528\u3002\u5c0f\u7684\u7684hashmap\u7f16\u7801\u4e3aziplist\u3002<\/em><\/p>\n<p>Zipmap\u662f\u4e00\u4e2a\u88ab\u5e8f\u5217\u5316\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684hashmap\u3002\u672c\u8d28\u4e0a\uff0c\u952e\u503c\u5bf9\u6309\u987a\u5e8f\u5b58\u50a8\u3002\u5728\u8fd9\u79cd\u7ed3\u6784\u91cc\u67e5\u627e\u4e00\u4e2a\u952e\u7684\u590d\u6742\u5ea6\u662fO(N)\u3002<br \/>\n\u5f53\u952e\u503c\u5bf9\u6570\u91cf\u5f88\u5c11\u65f6\uff0c\u8fd9\u4e2a\u7ed3\u6784\u7528\u4e8e\u66ff\u4ee3dictionary\u3002<\/p>\n<p>\u4e3a\u89e3\u6790zipmap\uff0c\u9996\u5148\u7528\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u4ece\u6d41\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5305\u88c5\u4e86zipmap\u3002\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u8868\u793a\u4e86zipmap\u3002<\/p>\n<p>\u5b57\u7b26\u4e32\u91cc\u7684zipmap\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<pre><code>\n  <zmlen><len>\"foo\"<len><free>\"bar\"<len>\"hello\"<len><free>\"world\"<zmend>\n\n  1.  zmlen : 1\u5b57\u8282\u957f\uff0c\u4fdd\u5b58zipmap\u7684\u5927\u5c0f. \u5982\u679c\u5927\u4e8e\u7b49\u4e8e254\uff0c\u503c\u4e0d\u4f7f\u7528\u3002\u5c06\u9700\u8981\u8fed\u4ee3\u6574\u4e2azipmap\u6765\u627e\u51fa\u957f\u5ea6.\n  2.  len : \u540e\u7eed\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u662f\u952e\u6216\u503c\u7684\u3002\u8fd9\u4e2a\u957f\u5ea6\u5b58\u50a8\u4e3a1\u4e2a\u62165\u4e2a\u5b57\u8282\uff08\u4e0e\u4e0a\u9762\u63cf\u8ff0\u7684\u201c\u957f\u5ea6\u7f16\u7801\u201d\u4e0d\u540c\uff09\u3002\n            \u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u8282\u4f4d\u4e8e 0 \u5230252\uff0c\u90a3\u4e48\u5b83\u662fzipmap\u7684\u957f\u5ea6\u3002\u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f253\uff0c\u8bfb\u53d6\u4e0b4\u4e2a\u5b57\u8282\u4f5c\u4e3a\u65e0\u7b26\u53f7\u6574\u6570\u6765\u8868\u793azipmap\u7684\u957f\u5ea6\u3002\n            254 \u548c 255 \u5bf9\u8fd9\u4e2a\u5b57\u6bb5\u662f\u975e\u6cd5\u7684. \n  3.  free : \u603b\u662f1\u5b57\u8282\uff0c\u6307\u51fa\u503c\u540e\u9762\u7684\u7a7a\u95f2\u5b57\u8282\u6570\u3002\u4f8b\u5982\uff0c\u5982\u679c\u952e\u7684\u503c\u662f\u201cAmerica\u201d\uff0c\u66f4\u65b0\u4e3a\u201cUSA\u201d\u540e\uff0c\u5c06\u67094\u4e2a\u7a7a\u95f2\u7684\u5b57\u8282.\n  4.  zmend : \u603b\u662f 255. \u6307\u51fazipmap\u7ed3\u675f. \n\n*\u6709\u6548\u7684\u4f8b\u5b50*\n  18 02 06 4d 4b 44 31 47 36 01 00 32 05 59 4e 4e 58 4b 04 00 46 37 54 49 ff ..\n\n  1.  \u4ece\u4f7f\u7528\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u5f00\u59cb\u89e3\u7801\u3002\u4f60\u4f1a\u6ce8\u610f\u523018\u662f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06\u8bfb\u53d6\u4e0b24\u4e2a\u5b57\u8282\uff0c\u76f4\u5230ff\u3002\n  2.  \u73b0\u5728\uff0c\u6211\u4eec\u5f00\u59cb\u89e3\u6790\u4ece  @02 06\u2026 @ \u5f00\u59cb\u7684\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528 \u201cZipmap \u7f16\u7801\u201d\n  3.  02\u662fhashmap\u91cc\u6761\u76ee\u7684\u6570\u91cf.\n  4.  06\u662f\u4e0b\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6. \u56e0\u4e3a\u957f\u5ea6\u5c0f\u4e8e254, \u6211\u4eec\u4e0d\u9700\u8981\u8bfb\u53d6\u4efb\u4f55\u989d\u5916\u7684\u5b57\u8282\n  5.  \u6211\u4eec\u8bfb\u53d6\u4e0b6\u4e2a\u5b57\u8282  4d 4b 44 31 47 36 \u6765\u5f97\u5230\u952e \u201cMKD1G6\u201d\n  6.  01\u662f\u4e0b\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5e94\u5f53\u662f\u503c\n  7.  00\u662f\u7a7a\u95f2\u5b57\u8282\u7684\u6570\u91cf\n  8.  \u8bfb\u53d6\u4e0b\u4e00\u4e2a\u5b57\u8282 0x32\uff0c\u5f97\u5230\u503c\u201c2\u201d\n  9.   \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7a7a\u95f2\u5b57\u8282\u662f0\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u8df3\u8fc7\u4efb\u4f55\u4e1c\u897f\n  10.  05\u662f\u4e0b\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662f\u952e\u3002\n  11.  \u8bfb\u53d6\u4e0b5\u4e2a\u5b57\u8282 59 4e 4e 58 4b, \u5f97\u5230\u952e \u201cYNNXK\u201d\n  12.  04\u662f\u4e0b\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u8fd9\u662f\u4e00\u4e2a\u503c\n  13.  00\u662f\u503c\u540e\u9762\u7684\u7a7a\u95f2\u5b57\u8282\u6570\n  14.  \u8bfb\u53d6\u4e0b4\u4e2a\u5b57\u8282 46 37 54 49 \u6765\u5f97\u5230\u503c \u201cF7TI\u201d\n  15.  \u6700\u7ec8\uff0c\u9047\u5230 FF, \u8fd9\u8868\u793a\u8fd9\u4e2azipmap\u7684\u7ed3\u675f\n  16. \u56e0\u6b64\uff0c\u8fd9\u4e2azipmap\u8868\u793ahash {\"MKD1G6\" => \"2\", \"YNNXK\" => \"F7TI\"}\n<\/code><\/pre>\n<h2>Ziplist \u7f16\u7801<\/h2>\n<p>\u4e00\u4e2aZiplist\u662f\u4e00\u4e2a\u5e8f\u5217\u5316\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684list\u3002\u672c\u8d28\u4e0a\uff0clist\u7684\u5143\u7d20\u6309\u987a\u5e8f\u5730\u5b58\u50a8\uff0c\u501f\u52a9\u4e8e\u6807\u8bb0\uff08flag\uff09\u548c\u504f\u79fb\uff08offset\uff09\u6765\u8fbe\u5230\u9ad8\u6821\u5730\u53cc\u5411\u904d\u5386list\u3002<\/p>\n<p>\u4e3a\u89e3\u6790\u4e00\u4e2aziplist\uff0c\u9996\u5148\u4ece\u6d41\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u6309\u201d\u5b57\u7b26\u4e32\u7f16\u7801\u201c\u3002\u8fd9\u4e2a\u5b57\u7b26\u4e32\u662fziplist\u7684\u5c01\u88c5\u3002\u8fd9\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u8868\u793a\u4e86ziplist\u3002<\/p>\n<p>\u5b57\u7b26\u4e32\u91cc\u7684ziplist\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<br \/>\n  <zlbytes><zltail><zllen><entry><entry><zlend><\/p>\n<blockquote>\n<ol>\n<li>zlbytes \uff1a\u8fd9\u662f\u4e00\u4e2a4\u5b57\u8282\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u8868\u793aziplist\u7684\u603b\u5b57\u8282\u6570\u3002\u8fd94\u5b57\u8282\u662flittle endian\u683c\u5f0f\uff0d\uff0d\u6700\u5148\u51fa\u73b0\u7684\u662f\u6700\u4f4e\u6709\u6548\u4f4d\u7ec4<\/li>\n<li>zltail\uff1a\u8fd9\u662f\u4e00\u4e2a4\u5b57\u8282\u65e0\u7b26\u53f7\u6574\u6570\uff0clittle endian\u683c\u5f0f\u3002\u5b83\u8868\u793a\u5230ziplist\u7684\u5c3e\u6761\u76ee\uff08tail entry\uff09\u7684\u504f\u79fb\u3002<\/li>\n<li>zllen\uff1a\u8fd9\u662f\u4e00\u4e2a2\u5b57\u8282\u65e0\u7b26\u53f7\u6574\u6570\uff0clittle endian\u683c\u5f0f\u3002\u5b83\u8868\u793aziplist\u7684\u6761\u76ee\u7684\u6570\u91cf<\/li>\n<li>entry\uff1a\u4e00\u4e2a\u6761\u76ee\u8868\u793aziplist\u7684\u5143\u7d20\u3002\u7ec6\u8282\u5728\u4e0b\u9762<\/li>\n<li>zlend\uff1a\u603b\u662f\u7b49\u4e8e255.\u5b83\u8868\u793aziplist\u7684\u7ed3\u675f<\/li>\n<\/ol>\n<\/blockquote>\n<p>ziplist\u7684\u6bcf\u4e2a\u6761\u76ee\u6709\u4e0b\u9762\u7684\u683c\u5f0f\uff1a<br \/>\n  <length-prev-entry><special-flag><raw-bytes-of-entry><\/p>\n<blockquote><p>\n  length-prev-enty\uff1a \u8fd9\u4e2a\u5b57\u6bb5\u5b58\u50a8\u4e0a\u4e00\u4e2a\u6761\u76ee\u7684\u957f\u5ea6\uff0c\u5982\u679c\u662f\u7b2c\u4e00\u4e2a\u6761\u76ee\u5219\u662f0\u3002\u8fd9\u5141\u8bb8\u5bb9\u6613\u5730\u8fdb\u884c\u53cd\u5411\u904d\u5386list\u3002\u8fd9\u4e2a\u957f\u5ea6\u5b58\u50a8\u4e3a1\u62165\u4e2a\u5b57\u8282\u3002<br \/>\n       \u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u8282\u5c0f\u4e8e\u7b49\u4e8e253\uff0c\u5b83\u88ab\u8ba4\u4e3a\u662f\u957f\u5ea6\uff0c\u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u8282\u662f254\uff0c\u63a5\u4e0b\u67654\u4e2a\u5b57\u8282\u7528\u4e8e\u5b58\u50a8\u957f\u5ea6\u30024\u5b57\u8282\u6309\u65e0\u7b26\u53f7\u6574\u6570\u8bfb\u53d6\u3002<\/p>\n<p>   special-flag\uff1a\u8fd9\u4e2a\u6807\u8bb0\u6307\u51fa\u6761\u76ee\u662f\u5b57\u7b26\u4e32\u8fd8\u662f\u6574\u6570\u3002\u5b83\u4e5f\u6307\u793a\u5b57\u7b26\u4e32\u957f\u5ea6\u6216\u6574\u6570\u7684\u5927\u5c0f\u3002\u8fd9\u4e2a\u6807\u8bb0\u7684\u53ef\u53d8\u7f16\u7801\u5982\u4e0b\uff1a<\/p>\n<blockquote>\n<ol>\n<li>|00pppppp|  \uff0d 1\u5b57\u8282\uff1a\u5b57\u7b26\u4e32\u503c\u957f\u5ea6\u5c0f\u4e8e\u7b49\u4e8e63\u5b57\u8282\uff086bit\uff09<\/li>\n<li>|01pppppp|qqqqqqqq|  \uff0d 2\u5b57\u8282\uff1a\u5b57\u7b26\u4e32\u503c\u957f\u5ea6\u5c0f\u4e8e\u7b49\u4e8e16383\u5b57\u8282\uff0814bit\uff09<\/li>\n<li>|10______|qqqqqqqq|rrrrrrrr|ssssssss|tttttttt|  \uff0d 5\u5b57\u8282\uff1a\u5b57\u7b26\u4e32\u503c\u957f\u5ea6\u5927\u4e8e\u7b49\u4e8e16384\u5b57\u8282<\/li>\n<li>|1100____|  \uff0d \u8bfb\u53d6\u540e\u97622\u4e2a\u5b57\u8282\u4f5c\u4e3a16bit\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li>|1101____|  \uff0d \u8bfb\u53d6\u540e\u97624\u4e2a\u5b57\u8282\u4f5c\u4e3a32bit\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li>|1110____|  \uff0d \u8bfb\u53d6\u540e\u97628\u4e2a\u5b57\u8282\u4f5c\u4e3a64bit\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li>|11110000|  \uff0d \u8bfb\u53d6\u540e\u97623\u4e2a\u5b57\u8282\u4f5c\u4e3a24bit\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li>|11111110|  \uff0d \u8bfb\u53d6\u540e\u97621\u4e2a\u5b57\u8282\u4f5c\u4e3a8bit\u6709\u7b26\u53f7\u6574\u6570<\/li>\n<li>|1111xxxx|  \uff0d \uff08\u5f53xxxx\u4f4d\u4e8e 0000 \u5230 1101\uff09\u76f4\u63a54bit\u6574\u6570\u30020 \u5230 12 \u7684\u65e0\u7b26\u53f7\u6574\u6570\u3002\u88ab\u7f16\u7801\u7684\u5b9e\u9645\u503c\u662f\u4ece 1 \u5230<br \/>\n               13\uff0c\u56e0\u4e3a 0000 \u548c 1111 \u4e0d\u80fd\u4f7f\u7528\uff0c\u6240\u4ee5\u5e94\u5f53\u4ece\u7f16\u7801\u76844bit\u503c\u91cc\u51cf\u53bb 1 \u6765\u83b7\u5f97\u6b63\u786e\u7684\u503c\u3002<\/p>\n<p>    Raw Bytes\uff1a\u5728special flag\u540e\uff0c\u662f\u539f\u59cb\u5b57\u8282\u3002\u5b57\u8282\u7684\u6570\u5b57\u7531\u524d\u9762\u7684special flag\u90e8\u5206\u51b3\u5b9a\u3002<\/p>\n<p>    <em>\u4e3e\u4f8b<\/em><br \/>\n    23 23 00 00 00 1e 00 00 00 04 00 00 e0 ff ff ff ff ff ff ff 7f 0a d0 ff ff 00 00 06 c0 fc 3f 04 c0 3f 00 ff &#8230;<br \/>\n    |           |           |     |                             |                 |           |           |<\/p>\n<\/li>\n<li>\n<p>\u4ece\u4f7f\u7528\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u5f00\u59cb\u89e3\u7801\u300223 \u662f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u7136\u540e\u8bfb\u53d635\u4e2a\u5b57\u8282\u76f4\u5230 ff<\/p>\n<\/li>\n<li>\u4f7f\u7528\u201cZiplist \u7f16\u7801\u201d\u89e3\u6790\u5f00\u59cb\u4e8e 23 00 00  &#8230; \u7684\u5b57\u7b26\u4e32<\/li>\n<li>\u524d4\u4e2a\u5b57\u8282 23 00 00 00 \u8868\u793aZiplis\u957f\u5ea6\u7684\u5b57\u8282\u603b\u6570\u3002\u6ce8\u610f\uff0c\u8fd9\u662flittle endian \u683c\u5f0f<\/li>\n<li>\u63a5\u4e0b\u67654\u4e2a\u5b57\u8282 1e 00 00 00 \u8868\u793a\u5230\u5c3e\u6761\u76ee\u7684\u504f\u79fb\u3002 0x1e = 30\uff0c\u8fd9\u662f\u4e00\u4e2a\u57fa\u4e8e0\u7684\u504f\u79fb\u3002<br \/>\n      0th position = 23, 1st position = 00 and so on. It follows that the last entry starts at 04 c0 3f 00 .. \u3002<\/li>\n<li>\u63a5\u4e0b\u67652\u4e2a\u5b57\u8282 04 00 \u8868\u793alist\u91cc\u6761\u76ee\u7684\u6570\u91cf\u3002<\/li>\n<li>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u8bfb\u53d6\u6761\u76ee\u3002<\/li>\n<li>00 \u8868\u793a\u524d\u4e00\u4e2a\u6761\u76ee\u7684\u957f\u5ea6\u30020\u8868\u793a\u8fd9\u662f\u7b2c\u4e00\u4e2a\u6761\u76ee\u3002<\/li>\n<li>e0 \u662f\u7279\u6b8a\u6807\u8bb0\uff0c\u56e0\u4e3a\u5b83\u5f00\u59cb\u4e8e\u4f4d\u6a21\u5f0f 1110____\uff0c\u8bfb\u53d6\u4e0b8\u4e2a\u5b57\u8282\u4f5c\u4e3a\u6574\u6570\u3002\u8fd9\u662flist\u7684\u7b2c\u4e00\u4e2a\u6761\u76ee\u3002<\/li>\n<li>\u73b0\u5728\u5f00\u59cb\u8bfb\u53d6\u7b2c\u4e8c\u4e2a\u6761\u76ee\u3002<\/li>\n<li>0a \u662f\u524d\u4e00\u4e2a\u6761\u76ee\u7684\u957f\u5ea6\u300210 \u5b57\u8282 \uff1d 1 \u5b57\u8282prev\u957f\u5ea6 \uff0b 1 \u5b57\u8282\u7279\u6b8a\u6807\u8bb0\u957f\u5ea6 \uff0b 8 \u5b57\u8282\u6574\u6570<\/li>\n<li>d0 \u662f\u7279\u6b8a\u6807\u8bb0\uff0c\u56e0\u4e3a\u5b83\u5f00\u59cb\u4e8e\u4f4d\u6a21\u5f0f 1101____\uff0c\u8bfb\u53d6\u4e0b4\u4e2a\u5b57\u8282\u4f5c\u4e3a\u6574\u6570\u3002\u8fd9\u662flist\u7684\u7b2c\u4e8c\u4e2a\u6761\u76ee\u3002<\/li>\n<li>\u73b0\u5728\u5f00\u59cb\u7b2c\u4e8c\u4e2a\u6761\u76ee\u3002<\/li>\n<li>06 \u662f\u524d\u4e00\u4e2a\u6761\u76ee\u7684\u957f\u5ea6\u3002 6 \u5b57\u8282 \uff1d 1 \u5b57\u8282prev\u957f\u5ea6 \uff0b 1 \u5b57\u8282\u7279\u6b8a\u6807\u8bb0 \uff0b 4 \u5b57\u8282\u6574\u6570\u3002<\/li>\n<li>c0 \u662f\u7279\u6b8a\u6807\u8bb0\uff0c\u56e0\u4e3a\u5b83\u5f00\u59cb\u4e8e\u4f4d\u6a21\u5f0f 1100____\uff0c\u8bfb\u53d6\u4e0b2\u4e2a\u5b57\u8282\u4f5c\u4e3a\u6574\u6570\u3002\u8fd9\u662flist\u7684\u7b2c\u4e09\u4e2a\u6761\u76ee\u3002<\/li>\n<li>\u73b0\u5728\u5f00\u59cb\u8bfb\u53d6\u7b2c\u56db\u4e2a\u6761\u76ee\u3002<\/li>\n<li>04 \u662f\u524d\u4e00\u4e2a\u9898\u76ee\u7684\u957f\u5ea6\u3002<\/li>\n<li>c0 \u6307\u51fa\u662f2\u5b57\u8282\u6574\u6570\u3002<\/li>\n<li>\u8bfb\u53d6\u4e0b2\u4e2a\u5b57\u8282\uff0c\u4f5c\u4e3a\u7b2c\u56db\u4e2a\u6761\u76ee\u3002<\/li>\n<li>\u6700\u7ec8\u9047\u5230 ff\uff0c\u8fd9\u8868\u660e\u5df2\u7ecf\u8bfb\u53d6\u5b8clist\u91cc\u7684\u6240\u6709\u5143\u7d20\u3002<\/li>\n<li>\u56e0\u6b64\uff0cziplist\u5b58\u50a8\u4e86\u503c  [0\u00d77fffffffffffffff, 65535, 16380, 63]\u3002<\/li>\n<\/ol>\n<\/blockquote>\n<\/blockquote>\n<h2>Intset \u7f16\u7801<\/h2>\n<p>\u4e00\u4e2aInset\u662f\u4e00\u4e2a\u6574\u6570\u7684\u4e8c\u53c9\u641c\u7d22\u6811\u3002\u8fd9\u4e2a\u4e8c\u53c9\u6811\u5728\u4e00\u4e2a\u6574\u6570\u6570\u7ec4\u91cc\u5b9e\u73b0\u3002inset\u7528\u4e8e\u5f53set\u7684\u6240\u6709\u5143\u7d20\u90fd\u662f\u6574\u6570\u65f6\u3002Inset\u652f\u6301\u8fbe64\u4f4d\u7684\u6574\u6570\u3002<br \/>\n\u4f5c\u4e3a\u4e00\u4e2a\u4f18\u5316\uff0c\u5982\u679c\u6574\u6570\u80fd\u7528\u66f4\u5c11\u7684\u5b57\u8282\u8868\u793a\uff0c\u6574\u6570\u6570\u7ec4\u5c06\u753116\u4f4d\u621632\u4f4d\u6574\u6570\u6784\u5efa\u3002\u5f53\u4e00\u4e2a\u65b0\u5143\u7d20\u63d2\u5165\u65f6\uff0cintset\u5b9e\u73b0\u5728\u9700\u8981\u65f6\u5c06\u8fdb\u884c\u4e00\u6b21\u5347\u7ea7\u3002<\/p>\n<p>\u56e0\u4e3aIntset\u662f\u4e8c\u53c9\u641c\u7d22\u6811\uff0cset\u91cc\u7684\u6570\u5b57\u603b\u662f\u6709\u5e8f\u7684\u3002<\/p>\n<p>\u4e00\u4e2aIntset\u6709\u4e00\u4e2aSet\u7684\u5916\u90e8\u63a5\u53e3\u3002<\/p>\n<p>\u4e3a\u4e86\u89e3\u6790Inset\uff0c\u9996\u5148\u4f7f\u7528\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u4ece\u6d41\u4e2d\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5305\u542b\u4e86Intset\u3002\u8fd9\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u8868\u793a\u4e86Intset\u3002<\/p>\n<p>\u5728\u5b57\u7b26\u4e32\u91cc\uff0cIntset\u6709\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u5e03\u5c40\uff1a<\/p>\n<blockquote><p>\n  <encoding><length-of-contents><contents><br \/>\n   1.  encoding\uff1a\u662f\u4e00\u4e2a32\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u3002\u5b83\u67093\u4e2a\u53ef\u80fd\u7684\u503c \uff0d 2, 4 \u6216 8.\u5b83\u6307\u51fa\u5185\u5bb9\u91cc\u5b58\u50a8\u7684\u6bcf\u4e2a\u6574\u6570\u7684\u5b57\u8282\u5927\u5c0f\u3002<br \/>\n        \u55ef\uff0c\u662f\u7684\uff0c\u8fd9\u662f\u6d6a\u8d39\u7684\uff0d\u53ef\u4ee5\u57282bit\u91cc\u5b58\u50a8\u8fd9\u4e9b\u4fe1\u606f\u3002<br \/>\n   2.  length-of-contet\uff1a\u662f\u4e00\u4e2a32\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\uff0c\u6307\u51fa\u5185\u5bb9\u6570\u7ec4\u7684\u957f\u5ea6\u3002<br \/>\n   3.  contents\uff1a\u662f\u4e00\u4e2a $length-of-content \u4e2a\u5b57\u8282\u7684\u6570\u7ec4\u3002\u5b83\u5305\u542b\u4e86\u4e8c\u53c9\u641c\u7d22\u6811\u3002\n<\/p><\/blockquote>\n<p><em>\u4e3e\u4f8b<\/em><br \/>\n14 04 00 00 00 03 00 00 00 fc ff 00 00 fd ff 00 00 fe ff 00 00 &#8230;<\/p>\n<ol>\n<li>\u4f7f\u7528\u201c\u5b57\u7b26\u4e32\u7f16\u7801\u201d\u6765\u5f00\u59cb\u300214 \u662f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u8bfb\u53d6\u4e0b20\u4e2a\u5b57\u8282\u76f4\u5230 00.<\/li>\n<li>\u73b0\u5728\uff0c\u5f00\u59cb\u89e3\u6790\u5f00\u59cb\u4e8e 04 00 00 &#8230;. \u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u524d4\u4e2a\u5b57\u8282 04 00 00 00 \u662f\u7f16\u7801\uff0c\u56e0\u4e3a\u5b83\u7684\u503c\u662f4\uff0c\u6211\u4eec\u77e5\u9053\u6211\u4eec\u6b63\u5728\u5904\u740632\u4f4d\u6574\u6570\u3002<\/li>\n<li>\u4e0b4\u4e2a\u5b57\u8282 03 00 00 00 \u662f\u5185\u5bb9\u7684\u957f\u5ea6\u3002\u8fd9\u6837\uff0c\u6211\u4eec\u77e5\u9053\u6211\u4eec\u6b63\u5728\u5904\u74063\u4e2a\u6574\u6570\uff0c\u6bcf\u4e2a4\u5b57\u8282\u957f\u3002<\/li>\n<li>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u4ee54\u4e2a\u5b57\u8282\u4e3a\u4e00\u7ec4\u8bfb\u53d6\uff0c\u518d\u628a\u5b83\u8f6c\u6362\u4e3a\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u6570\u3002<\/li>\n<li>\u8fd9\u6837\uff0c\u6211\u4eec\u7684intset\u770b\u8d77\u6765\u662f\u8fd9\u6837\u7684 \uff0d 0x0000FFFC, 0x0000FFFD, 0x0000FFFE\u3002\u6ce8\u610f\uff0c\u8fd9\u4e9b\u6574\u6570\u662flittle endian\u683c\u5f0f\u7684\u3002\u9996\u5148\u51fa\u73b0\u7684\u662f\u6700\u4f4e\u6709\u6548\u4f4d\u3002<\/li>\n<\/ol>\n<h2>\u4ee5Ziplist \u7f16\u7801\u7684 Sorted Set<\/h2>\n<p>\u4ee5ziplist\u7f16\u7801\u5b58\u50a8\u7684sorted list\u8ddf\u4e0a\u9762\u63cf\u8ff0\u7684Ziplist\u5f88\u50cf\u3002\u5728ziplist\u91cc\uff0csorted set\u7684\u6bcf\u4e2a\u5143\u7d20\u540e\u8ddf\u5b83\u7684score\u3002<\/p>\n<p><em>\u4e3e\u4f8b<\/em><br \/>\n [\u2018Manchester City\u2019, 1, \u2018Manchester United\u2019, 2, \u2018Totenham\u2019, 3]<\/p>\n<p>\u5982\u4f60\u6240\u89c1score\u8ddf\u5728\u6bcf\u4e2a\u5143\u7d20\u540e\u9762\u3002<\/p>\n<h2>Ziplist\u7f16\u7801\u7684Hashmap<\/h2>\n<p>\u5728\u8fd9\u91cc\uff0chashmap\u7684\u952e\u503c\u5bf9\u662f\u4f5c\u4e3a\u8fde\u7eed\u7684\u6761\u76ee\u5b58\u50a8\u5728ziplist\u91cc\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u8fd9\u662f\u5728rdb\u7248\u672c4\u5f15\u5165\uff0c\u5b83\u5e9f\u5f03\u4e86\u5728\u5148\u524d\u7248\u672c\u91cc\u4f7f\u7528\u7684zipmap\u3002<\/p>\n<p><em>\u4e3e\u4f8b<\/em><br \/>\n {&#8220;us&#8221; => \u201cwashington\u201d, \u201cindia\u201d => &#8220;delhi&#8221;}<br \/>\n\u5b58\u50a8\u5728ziplist\u91cc\u662f\uff1a  [\u201cus\u201d, \u201cwashington\u201d, \u201cindia\u201d, \u201cdelhi\u201d]<\/p>\n<h3>CRC32 \u6821\u9a8c\u548c<\/h3>\n<p>\u4eceRDB\u7248\u672c5\u5f00\u59cb\uff0c\u4e00\u4e2a8\u5b57\u8282\u7684CRC32\u6821\u9a8c\u548c\u88ab\u52a0\u5230\u6587\u4ef6\u7ed3\u5c3e\u3002\u53ef\u4ee5\u901a\u8fc7redis.conf \u6587\u4ef6\u7684\u4e00\u4e2a\u53c2\u6570\u6765\u4f5c\u5e9f\u8fd9\u4e2a\u6821\u9a8c\u548c\u3002<\/p>\n<p>\u5f53\u6821\u9a8c\u548c\u88ab\u4f5c\u5e9f\u65f6\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u5c06\u662f0\u3002<\/p>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5e74\u5e74\u521d\u7ffb\u8bd1\u7684\uff0c\u90fd\u5fd8\u5f97\u5dee\u4e0d\u591a\u4e86\uff0c\u6700\u8fd1\u60f3\u7528Go\u5199\u4e2a\u7a0b\u5e8f\u89e3\u6790RDB\u6587\u4ef6\uff0c\u91cd\u65b0\u7ffb\u51fa\u6765\u3002 &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/open-source\/20130922\/486\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77],"tags":[94],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/486"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=486"}],"version-history":[{"count":4,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/486\/revisions"}],"predecessor-version":[{"id":490,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/486\/revisions\/490"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}