{"id":1644,"date":"2010-03-25T21:28:55","date_gmt":"2010-03-25T13:28:55","guid":{"rendered":"http:\/\/www.orczhou.com\/?p=1644"},"modified":"2011-11-30T15:17:24","modified_gmt":"2011-11-30T07:17:24","slug":"innodb-plugin-compression","status":"publish","type":"post","link":"https:\/\/www.orczhou.com\/index.php\/2010\/03\/innodb-plugin-compression\/","title":{"rendered":"InnoDB Plugin\u65b0\u7279\u6027\uff1a\u538b\u7f29\u8868"},"content":{"rendered":"<p>Plugin\u7684\u4e00\u4e2a\u91cd\u8981\u7684\u7279\u6027\u5c31\u662f\u589e\u52a0\u4e86\u538b\u7f29\u5b58\u50a8\u3002\u5bf9\u4e8e\u6570\u636e\u4e2d\u6709\u5f88\u591aLong column(\u5305\u62ecTEXT BLOB\u6216\u8005\u5927VARCHAR)\u7684\u573a\u666f\u80fd\u591f\u5927\u5e45\u8282\u7ea6\u7a7a\u95f4\uff0c\u5e76\u63d0\u5347\u6548\u7387\u3002<\/p>\n<p><font color=\"red\">1. \u8c01\u9700\u8981\u538b\u7f29\uff1f<\/font><\/p>\n<p>\u5728InnoDB\u4e2d\uff0c\u662f<a href=\"http:\/\/www.orczhou.com\/index.php\/2009\/08\/image-innodb-tablespace\/\">\u4ee516K\u7684\u9875\uff08Page\uff09\u4e3a\u57fa\u672c\u7684\u5b58\u50a8\u5355\u4f4d<\/a>\u7684\u3002\u6211\u4eec\u77e5\u9053\uff0cInnoDB\u662f\u7684\u6570\u636e\u662f\u5728Clustered index\u4e2d\u5b58\u50a8\u7684\uff0c\u5728Secondary index\u4e2d\u4ec5\u5b58\u50a8\u5bf9\u5e94\u6570\u636e\u7684PK\u3002Clustered index\u548cSecondary index\u90fd\u662fB-Tree\u7ed3\u6784\u7684\uff0c\u6240\u4ee5<strong>\u5bf9InnoDB\u6570\u636e\u9875\u548c\u7d22\u5f15\u9875\u7684\u538b\u7f29\u5f88\u5927\u7a0b\u5ea6\u4e0a\u5c31\u662f\u5bf9B-Tree\u8282\u70b9\u9875\u7684\u538b\u7f29<\/strong>\u3002<\/p>\n<p>\u5728InnoDB\u4e2d\uff0c\u9664\u4e86B-Tree\u8282\u70b9\u9875\uff0c\u8fd8\u6709\u4e00\u7c7b\u6570\u636e\u9875\uff08Page\uff09\uff0c\u79f0\u4e3a\u201coverflow page\u201d\u3002\u5f53\u9700\u8981\u5b58\u50a8Long column\u65f6\uff0c\u5982\u679c\u5f53\u524d\u9875\u80fd\u591f\u5b8c\u5168\u5b58\u50a8\u5168\u90e8\u5b57\u6bb5\u65f6\uff0c\u5219\u5b58\u50a8\u5728\u5f53\u524d\u9875\u4e2d\uff1b\u5982\u679c\u5f53\u524d\u9875\u4e0d\u8db3\u4ee5\u5b58\u50a8\u5168\u90e8\uff0c\u5219InnoDB\u9009\u62e9\u6700\u957f\u7684\u5b57\u6bb5\uff0c\u5c06\u5176\u5b58\u50a8\u5230\u4e00\u4e2a\u5355\u72ec\u7684\u9875\u4e2d\uff0c\u6211\u4eec\u79f0\u8fd9\u6837\u7684\u9875\u4e3a\u201coverflow page\u201d\uff0c\u800c\u539f\u6570\u636e\u9875\u4ec5\u4ec5\u9700\u5b58\u50a8\u4e00\u4e2a20Bytes\u7684\u6307\u9488\u3002\u53c2\u8003\u4e0b\u56fe\uff1a<\/p>\n<p><a href=\"http:\/\/www.flickr.com\/photos\/26825745@N06\/4457179774\/\" title=\"InnoDB_overflow_page by orczhou, on Flickr\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm3.static.flickr.com\/2715\/4457179774_f6d1ceb851_o.png\" width=\"331\" height=\"144\" alt=\"InnoDB_overflow_page\" \/><\/a><\/p>\n<p>\u6240\u4ee5InnoDB\u9664\u4e86\u6709\u4e0a\u9762\u7684B-Tree\u9875\u5916\uff0cInnoDB\u8fd8\u5b58\u50a8overflow\u9875\u3002\u4e8b\u5b9e\u4e0a\uff0c\u9700\u8981\u538b\u7f29\u7684\u6570\u636e\u9875\u4e5f\u5c31\u662f\u8fd9\u4e24\u7c7b\uff0cInnoDB\u4e3a\u4e86\u83b7\u5f97\u66f4\u597d\u7684\u6548\u7387\uff0c\u9488\u5bf9\u8fd9\u4e24\u7c7b\u6570\u636e\u9875\u7684\u538b\u7f29\u662f\u4f7f\u7528\u4e0d\u540c\u7684\u7b56\u7565\u7684\u3002<\/p>\n<p><!--more--><\/p>\n<p><font color=\"red\">2. \u5982\u4f55\u538b\u7f29B-Tree\u9875<\/font><\/p>\n<p>\u672a\u6765\u5c3d\u53ef\u80fd\u591a\u7684\u907f\u514d\u538b\u7f29\u3001\u89e3\u538b\u5e26\u6765\u7684\u989d\u5916\u6d88\u8017\uff0cInnoDB\u5728\u538b\u7f29\u540e\u7684B-Tree\u9875\u4e2d\u65b0\u589e\u4e86\u4e00\u4e2amodification log\u533a\uff0c\u901a\u8fc7\u8bb0\u5f55\u5f53\u524d\u7684\u9875\u7684\u4fee\u6539\u65e5\u5fd7\uff0c\u6765\u907f\u514d\u9891\u7e41\u538b\u7f29\u89e3\u538b\uff08\u53c2\u8003\u5de6\u56fe\uff09\u3002<\/p>\n<div style=\"float:left;margin-right:15px\"><a href=\"http:\/\/www.flickr.com\/photos\/26825745@N06\/4456426179\/\" title=\"InnoDB_Page_compression by orczhou, on Flickr\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm3.static.flickr.com\/2782\/4456426179_b7e962d095_o.png\" width=\"154\" height=\"290\" alt=\"InnoDB_Page_compression\" \/><\/a><\/div>\n<p>\u5f53modification log\u7a7a\u95f4\u4e0d\u8db3\u65f6\uff0c\u624d\u8fdb\u884c\u89e3\u538b\u5e76\u5e94\u7528\u8fd9\u4e9bLog\uff0c\u7136\u540e\u518d\u538b\u7f29\u56de\u53bb\u3002\u5982\u679c\u5fc5\u8981\uff0c\u8fd9\u91cc\u53ef\u80fd\u4f1a\u51fa\u73b0B-Tree\u9875\u7684\u5206\u88c2\u3002<\/p>\n<p><font color=\"red\">3. \u5982\u4f55\u538b\u7f29over-flow\u9875<\/font><\/p>\n<p>overflow\u7684\u538b\u7f29\u9875\u9762\u5219\u76f8\u5bf9\u7b80\u5355\uff0c\u4ec5\u5305\u542b\u4e00\u4e2a\u9875\u9762\u5934\uff08header\uff09\uff0c\u9875\u9762\u5c3e\uff08Trailer\uff09\u4e2d\u95f4\u5c31\u662f\u538b\u7f29\u6570\u636e\u3002\u8bd5\u60f3\uff0c\u5982\u679c\u5b58\u50a8\u7684Long Column\u662f\u80fd\u591f\u9ad8\u5ea6\u538b\u7f29\u7684\u5185\u5bb9\uff08\u4f8b\u5982\u6587\u672c\uff0cXml\u7b49\uff09\uff0c\u8fd9\u6837\u5c06\u8282\u7701\u5f88\u591a\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u8fdb\u800c\u80fd\u591f\u8282\u7701I\/O\u3002\uff08\u53c2\u8003\u4e0b\u56fe\uff09<a href=\"http:\/\/www.flickr.com\/photos\/26825745@N06\/4457242772\/\" title=\"InnoDB_over_page_2 by orczhou, on Flickr\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm5.static.flickr.com\/4024\/4457242772_583deaf273_o.png\" width=\"435\" height=\"46\" alt=\"InnoDB_over_page_2\" \/><\/a><\/p>\n<p><font color=\"red\">4. \u538b\u7f29\u7684\u7b97\u6cd5\u662f\u4ec0\u4e48<\/font><\/p>\n<p>\u538b\u7f29\u4f7f\u7528\u7684\u662f<a href=\"http:\/\/www.zlib.net\/\">zlib library<\/a>\u4e2d\u7684<a href=\"http:\/\/zh.wikipedia.org\/wiki\/LZ77%E4%B8%8ELZ78\">LZ77<\/a>\u7b97\u6cd5\u3002<\/p>\n<p><font color=\"red\">5. \u538b\u7f29\u548cBuffer Pool<\/font><\/p>\n<p>\u5f53\u4f7f\u7528\u538b\u7f29\u5b58\u50a8\u7684\u9875\u9762\uff0c\u5f53Buffer Pool\u8f7d\u5165\u540e\uff0c\u4f1a\u5c06\u5176\u89e3\u538b\u3002\u8fd9\u65f6\uff0c\u8be5\u9875\u9762\u5728Buffer Pool\u4e2d\u540c\u65f6\u5b58\u5728\u201c\u538b\u7f29\u7248\u201d\u548c\u201c\u89e3\u538b\u7248\u201d\u3002\u5f53Buffer Pool\u9700\u8981\u9a71\u9010\u8fd9\u4e9b\u9875\u7684\u65f6\u5019\uff0c\u6709\u4e24\u79cd\u60c5\u51b5\u4f1a\u53d1\u751f\uff1a\u5982\u679cInnoDB\u8ba4\u4e3a\u5f53\u524d\u5e94\u7528\u662fIO-Bound\uff0c\u76f8\u6bd4CPU\u8fd8\u6709\u989d\u5916\u80fd\u529b\u6765\u505a\u89e3\u538b\u64cd\u4f5c\uff0c\u5219InnoDB\u9009\u62e9\u4ec5\u9a71\u9010\u9875\u9762\u7684\u201c\u89e3\u538b\u7248\u201d\uff1b\u5426\u5219InnoDB\u4f1a\u5c06\u9875\u9762\u7684\u4e24\u4e2a\u7248\u672c\u540c\u65f6\u9a71\u9010\u51fa\u53bb\u3002\u4e5f\u5c31\u662f\u8bf4Buffer Pool\u4f1a\u662f\u4e0b\u56fe\u7684\u72b6\u6001\uff1a<\/p>\n<p><a href=\"http:\/\/www.flickr.com\/photos\/26825745@N06\/4457270684\/\" title=\"Compress_Buffer_Pool by orczhou, on Flickr\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/farm5.static.flickr.com\/4038\/4457270684_4df8f95a78_o.png\" width=\"415\" height=\"255\" alt=\"Compress_Buffer_Pool\" \/><\/a><\/p>\n<p><font color=\"red\">6. \u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u538b\u7f29\u6570\u636e\u8868<\/font><\/p>\n<p>\u539f\u7406\u662f\u590d\u6742\u7684\uff0c\u64cd\u4f5c\u5176\u5b9e\u5f88\u7b80\u5355\uff1a<\/p>\n<div class=\"mycode\">CREATE TABLE name (column1 INT PRIMARY KEY) ENGINE=InnoDB<br \/>\nROW_FORMAT=COMPRESSED<br \/>\nKEY_BLOCK_SIZE=4;\n<\/div>\n<p>\u8fd9\u91cc\u521b\u5efa\u4e86\u4e00\u4e2a\uff0c\u538b\u7f29\u540e\u9875\u9762\u5927\u5c0f\u4e3a4K\uff08\u9ed8\u8ba4\u4e3a8K\uff09\u7684\u538b\u7f29\u6570\u636e\u8868\u3002<\/p>\n<p>\u53c2\u8003\u6587\u732e\uff1a<a href=\"http:\/\/www.innodb.com\/doc\/innodb_plugin-1.0\/index.html\">InnoDB Plugin User Guide<\/a><\/p>\n<p>\uff08\u5168\u6587\u5b8c\uff09<\/p>\n<div style=\"clear:both\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Plugin\u7684\u4e00\u4e2a\u91cd\u8981\u7684\u7279\u6027\u5c31\u662f\u589e\u52a0\u4e86\u538b\u7f29\u5b58\u50a8\u3002\u5bf9\u4e8e\u6570\u636e\u4e2d\u6709\u5f88\u591aLong column(\u5305\u62ecTEXT BLOB\u6216\u8005\u5927VARCHAR)\u7684\u573a\u666f\u80fd\u591f\u5927\u5e45\u8282\u7ea6\u7a7a\u95f4\uff0c\u5e76\u63d0\u5347\u6548\u7387\u3002 1. \u8c01\u9700\u8981\u538b\u7f29\uff1f \u5728InnoDB\u4e2d\uff0c\u662f\u4ee516K\u7684\u9875\uff08Page\uff09\u4e3a\u57fa\u672c\u7684\u5b58\u50a8\u5355\u4f4d\u7684\u3002\u6211\u4eec\u77e5\u9053\uff0cInnoDB\u662f\u7684\u6570\u636e\u662f\u5728Clustered index\u4e2d\u5b58\u50a8\u7684\uff0c\u5728Secondary index\u4e2d\u4ec5\u5b58\u50a8\u5bf9\u5e94\u6570\u636e\u7684PK\u3002Clustered index\u548cSecondary index\u90fd\u662fB-Tree\u7ed3\u6784\u7684\uff0c\u6240\u4ee5\u5bf9InnoDB\u6570\u636e\u9875\u548c\u7d22\u5f15\u9875\u7684\u538b\u7f29\u5f88\u5927\u7a0b\u5ea6\u4e0a\u5c31\u662f\u5bf9B-Tree\u8282\u70b9\u9875\u7684\u538b\u7f29\u3002 \u5728InnoDB\u4e2d\uff0c\u9664\u4e86B-Tree\u8282\u70b9\u9875\uff0c\u8fd8\u6709\u4e00\u7c7b\u6570\u636e\u9875\uff08Page\uff09\uff0c\u79f0\u4e3a\u201coverflow page\u201d\u3002\u5f53\u9700\u8981\u5b58\u50a8Long column\u65f6\uff0c\u5982\u679c\u5f53\u524d\u9875\u80fd\u591f\u5b8c\u5168\u5b58\u50a8\u5168\u90e8\u5b57\u6bb5\u65f6\uff0c\u5219\u5b58\u50a8\u5728\u5f53\u524d\u9875\u4e2d\uff1b\u5982\u679c\u5f53\u524d\u9875\u4e0d\u8db3\u4ee5\u5b58\u50a8\u5168\u90e8\uff0c\u5219InnoDB\u9009\u62e9\u6700\u957f\u7684\u5b57\u6bb5\uff0c\u5c06\u5176\u5b58\u50a8\u5230\u4e00\u4e2a\u5355\u72ec\u7684\u9875\u4e2d\uff0c\u6211\u4eec\u79f0\u8fd9\u6837\u7684\u9875\u4e3a\u201coverflow page\u201d\uff0c\u800c\u539f\u6570\u636e\u9875\u4ec5\u4ec5\u9700\u5b58\u50a8\u4e00\u4e2a20Bytes\u7684\u6307\u9488\u3002\u53c2\u8003\u4e0b\u56fe\uff1a \u6240\u4ee5InnoDB\u9664\u4e86\u6709\u4e0a\u9762\u7684B-Tree\u9875\u5916\uff0cInnoDB\u8fd8\u5b58\u50a8overflow\u9875\u3002\u4e8b\u5b9e\u4e0a\uff0c\u9700\u8981\u538b\u7f29\u7684\u6570\u636e\u9875\u4e5f\u5c31\u662f\u8fd9\u4e24\u7c7b\uff0cInnoDB\u4e3a\u4e86\u83b7\u5f97\u66f4\u597d\u7684\u6548\u7387\uff0c\u9488\u5bf9\u8fd9\u4e24\u7c7b\u6570\u636e\u9875\u7684\u538b\u7f29\u662f\u4f7f\u7528\u4e0d\u540c\u7684\u7b56\u7565\u7684\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","inline_featured_image":false,"_tocer_settings":[],"footnotes":""},"categories":[6],"tags":[120,52,118],"class_list":["post-1644","post","type-post","status-publish","format-standard","hentry","category-mysql","tag-innodb","tag-innodb-plugin","tag-mysql"],"_links":{"self":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1644","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/comments?post=1644"}],"version-history":[{"count":28,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1644\/revisions"}],"predecessor-version":[{"id":3301,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/1644\/revisions\/3301"}],"wp:attachment":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/media?parent=1644"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/categories?post=1644"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/tags?post=1644"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}