{"id":509,"date":"2008-07-22T00:00:00","date_gmt":"2008-07-21T16:00:00","guid":{"rendered":"http:\/\/www.strongd.net\/?p=509"},"modified":"2011-07-15T09:24:01","modified_gmt":"2011-07-15T01:24:01","slug":"mysql-storage-engine-%e5%b0%8f%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=509","title":{"rendered":"MySQL Storage Engine \u5c0f\u8bb0"},"content":{"rendered":"

\u8fd9\u6bb5\u65f6\u95f4\u5728\u770b\u300aHigh Performance MySQL\u300b\uff0c\u770b\u5230\u5b58\u50a8\u5f15\u64ce\u8fd9\u4e2a\u5730\u65b9\u611f\u5230\u5f88\u591a\u7ec6\u8282\u6bd4\u8f83\u964c\u751f\uff0c\u6240\u4ee5\u603b\u7ed3\u5c0f\u8bb0\u4e00\u4e9b

\u4e3a\u4e86\u9002\u5e94\u5404\u79cd\u4e0d\u540c\u7684\u8fd0\u884c\u73af\u5883\uff0cMYSQL\u63d0\u4f9b\u4e86\u591a\u79cd\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\uff08Storage Engine \uff09,\u5728\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u8fd9\u4e2a\u5c42\u9762\u4e0a\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u9700\u6c42\u9009\u62e9\u9002\u5408\u7684Storage Engine \u65b9\u6848\uff0c\u66f4\u4e3a\u7075\u6d3b\u7684\u662f\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u6bcf\u5f20\u8868\u5c06\u8981\u5b58\u50a8\u6570\u636e\u7684\u7279\u70b9\uff0c\u9009\u62e9\u4e0d\u540c\u7684Storage Engine,\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e00\u4e2aMYSQL\u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u6df7\u5408\u4f7f\u7528\u591a\u79cd\u4e0d\u540c\u7684Storage Engine

\u9996\u5148\u5c0f\u77a5\u4e00\u4e0bMySQL\u7684\u4f53\u7cfb\u7ed3\u6784\uff0c\u5728\u6700\u9ad8\u62bd\u8c61\u5c42\u5ea6\u4e0b\uff0c\u53ef\u4ee5\u7528Garlan & Shaw\u7684\u5206\u5c42\u7ed3\u6784\u4f53\u7cfb\u6765\u8868\u793a\uff08\u5de6\uff09
\"\"
\u5176\u4e2d\u5e94\u7528\u5c42\u4e3a\u6240\u6709RDBMS\u7528\u6237\u63d0\u4f9b\u7528\u6237\u63a5\u53e3\uff0c\u903b\u8f91\u5c42\u5305\u62ec\u4e86\u6240\u6709\u6838\u5fc3\u529f\u80fd\u7684\u5b9e\u73b0\uff0c\u7269\u7406\u5c42\u5219\u8d1f\u8d23\u5c06\u6570\u636e\u5b58\u50a8\u5728\u786c\u4ef6\u8bbe\u5907\u4e0a\u3002

\u56fe\u4e2d\u53f3\u4fa7\u66f4\u4e3a\u5177\u4f53\u7684\u63cf\u8ff0\u4e86\u903b\u8f91\u5c42\u7684\u7ec4\u6210\uff0c\u67e5\u8be2\u5904\u7406\u5b50\u7cfb\u7edf\u3001\u4e8b\u52a1\u7ba1\u7406\u5b50\u7cfb\u7edf\u3001\u6062\u590d\u7ba1\u7406\u5b50\u7cfb\u7edf\u548c\u5b58\u50a8\u7ba1\u7406\u5b50\u7cfb\u7edf\u5171\u540c\u7ec4\u6210\u4e86MySQL\u7684\u903b\u8f91\u5c42\u3002\u76f8\u4fe1Storage Engine\u7684\u4f4d\u7f6e\u662f\u5728Storage Management\u5904\uff0c\u65e2Storage Engine\u5c5e\u4e8eStorage Management\u5b50\u7cfb\u7edf\u7684\u4e00\u90e8\u5206

\u4e3a\u4e86\u8ba9\u601d\u8def\u66f4\u6e05\u6670\u4e00\u4e9b\uff0c\u4e0b\u9762\u7ed9\u51fa\u4e00\u5e45\u6bd4\u8f83\u5168\u9762\u7684\u4f53\u7cfb\u7ed3\u6784\u56fe\uff08\u6216\u66f4\u786e\u5207\u7684\u8bf4\u662f\u6d41\u7a0b\u56fe\uff0c\u53ea\u662f\u5ffd\u7565\u4e86\u53cd\u9988\uff09
\"\"
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\"\"
\u8fde\u63a5\u4e0a\u56fe\u4e2d\u7b2c\u4e8c\u5c42\u548c\u7b2c\u4e09\u5c42\u4e4b\u95f4\u7684\u63a5\u53e3\u662f\u5e76\u4e0d\u9488\u5bf9\u4efb\u4f55\u5b58\u50a8\u5f15\u64ce\u7684\u5355\u4e00API,.\u5927\u6982\u753120\u4e2a\u57fa\u672c\u7684\u7c7b\u4f3c\u201c\u542f\u52a8\u4e8b\u52a1\uff0c\u8fd4\u56de\u7ed3\u679c\u96c6\u201d\u7b49\u51fd\u6570\u7ec4\u6210\u3002\u5b58\u50a8\u5f15\u64ce\u5e76\u4e0d\u5904\u7406SQL\uff0c\u76f8\u4e92\u4e4b\u95f4\u4e5f\u4e0d\u901a\u4fe1\uff0c\u5b83\u4eec\u7684\u4efb\u52a1\u53ea\u662f\u7b80\u5355\u7684\u54cd\u5e94\u9ad8\u5c42\u4f20\u6765\u7684\u8bf7\u6c42\u3002

\u5b58\u50a8\u5f15\u64ce\u5404\u81ea\u7684\u4e00\u4e9b\u7279\u70b9<\/SPAN> <\/STRONG>

\u4e0a\u9762\u63d0\u5230\u7684\u56db\u79cd\u5b58\u50a8\u5f15\u64ce\u90fd\u6709\u5404\u81ea\u9002\u7528\u7684\u73af\u5883\uff0c\u8fd9\u53d6\u51b3\u4e8e\u5b83\u4eec\u72ec\u6709\u7684\u4e00\u4e9b\u7279\u5f81\u3002\u4e3b\u8981\u4f53\u73b0\u5728\u6027\u80fd\u3001\u4e8b\u52a1\u3001\u5e76\u53d1\u63a7\u5236\u3001\u53c2\u7167\u5b8c\u6574\u6027\u3001\u7f13\u5b58\u3001 \u6545\u969c\u6062\u590d\uff0c\u5907\u4efd\u53ca\u56de\u5b58\u7b49\u51e0\u4e2a\u65b9\u9762


\u76ee\u524d\u6bd4\u8f83\u666e\u53ca\u7684\u5b58\u50a8\u5f15\u64ce\u662fMyISAM\u548cInnoDB.\u800cMyISAM\u53c8\u662f\u7edd\u5927\u90e8\u5206Web\u5e94\u7528\u7684\u9996\u9009\u3002MyISAM\u4e0eInnoDB\u7684\u4e3b\u8981\u7684\u4e0d\u540c\u70b9\u5728\u4e8e\u6027\u80fd\u548c\u4e8b\u52a1\u63a7\u5236\u4e0a\u3002

MyISAM\u662f\u65e9\u671fISAM(Indexed Sequential Access Method,\u6211\u73b0\u5728\u7528\u7684MySQL5.0\u5df2\u7ecf\u4e0d\u652f\u6301ISAM\u4e86\uff09\u7684\u6269\u5c55\u5b9e\u73b0\uff0cISAM\u88ab\u8bbe\u8ba1\u4e3a\u9002\u5408\u5904\u7406\u8bfb\u9891\u7387\u8fdc\u5927\u4e8e\u5199\u9891\u7387\u8fd9\u6837\u4e00\u79cd\u60c5\u51b5\uff0c\u56e0\u6b64ISAM\u4ee5\u53ca\u540e\u6765\u7684MyISAM\u90fd\u6ca1\u6709\u8003\u8651\u5bf9\u4e8b\u7269\u7684\u652f\u6301\uff0c\u6392\u9664\u4e86TPM\uff0c\u4e0d\u9700\u8981\u4e8b\u52a1\u8bb0\u5f55\uff0cISAM\u7684\u67e5\u8be2\u6548\u7387\u76f8\u5f53\u53ef\u89c2\uff0c\u800c\u4e14\u5185\u5b58\u5360\u7528\u5f88\u5c11\u3002MyISAM\u5728\u7ee7\u627f\u4e86\u8fd9\u7c7b\u4f18\u70b9\u7684\u540c\u65f6\uff0c\u4e0e\u65f6\u4ff1\u8fdb\u7684\u63d0\u4f9b\u4e86\u5927\u91cf\u5b9e\u7528\u7684\u65b0\u7279\u6027\u548c\u76f8\u5173\u5de5\u5177\u3002\u4f8b\u5982\u8003\u8651\u5230\u5e76\u53d1\u63a7\u5236\uff0c\u63d0\u4f9b\u4e86\u8868\u7ea7\u9501\uff0c\u867d\u7136MyISAM\u672c\u8eab\u4e0d\u652f\u6301\u5bb9\u9519\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7myisamchk\u8fdb\u884c\u6545\u969c\u6062\u590d\u3002\u800c\u4e14\u7531\u4e8eMyISAM\u662f\u6bcf\u5f20\u8868\u4f7f\u7528\u5404\u81ea\u72ec\u7acb\u7684\u5b58\u50a8\u6587\u4ef6\uff08MYD\u6570\u636e\u6587\u4ef6\u548cMYI\u7d22\u5f15\u6587\u4ef6\uff09\uff0c\u4f7f\u5f97\u5907\u4efd\u53ca\u6062\u590d\u5341\u5206\u65b9\u4fbf\uff08\u62f7\u8d1d\u8986\u76d6\u5373\u53ef\uff09\uff0c\u800c\u4e14\u8fd8\u652f\u6301\u5728\u7ebf\u6062\u590d\u3002

\u6240\u4ee5\u5982\u679c\u4f60\u7684\u5e94\u7528\u662f\u4e0d\u9700\u8981\u4e8b\u52a1\uff0c\u5904\u7406\u7684\u53ea\u662f\u57fa\u672c\u7684CRUD\u64cd\u4f5c\uff0c\u90a3\u4e48MyISAM\u662f\u4e0d\u4e8c\u9009\u62e9

InnoDB\u88ab\u8bbe\u8ba1\u6210\u9002\u7528\u4e8e\u9ad8\u5e76\u53d1\u8bfb\u5199\u7684\u60c5\u51b5.\u4f7f\u7528MVCC(Multi-Version Concurrency Control)\u4ee5\u53ca\u884c\u7ea7\u9501\u6765\u63d0\u4f9b\u9075\u4eceACID\u7684\u4e8b\u52a1\u652f\u6301\u3002InnoDB\u652f\u6301\u5916\u952e\u53c2\u7167\u5b8c\u6574\u6027\uff0c\u5177\u5907\u6545\u969c\u6062\u590d\u80fd\u529b\u3002\u53e6\u5916 InnoDB\u7684\u6027\u80fd\u5176\u5b9e\u8fd8\u662f\u4e0d\u9519\u7684\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u5927\u6570\u636e\u91cf\u7684\u60c5\u51b5\u4e0b,\u7528\u5b98\u65b9\u7684\u8bdd\u8bf4\u5c31\u662f\uff1a InnoDB\u7684CPU\u6548\u7387\u662f\u5176\u4ed6\u57fa\u4e8e\u78c1\u76d8\u7684\u5173\u7cfb\u6570\u636e\u5e93\u5b58\u50a8\u5f15\u64ce\u6240\u4e0d\u80fd\u6bd4\u7684\u3002\u4e0d\u8fc7InnoDB\u7684\u5907\u4efd\u6062\u590d\u8981\u9ebb\u70e6\u4e00\u70b9\uff0c\u9664\u975e\u4f60\u4f7f\u7528\u4e864.1\u4ee5\u540e\u7248\u672c\u63d0\u4f9b\u7684Mulit-tablespace\u652f\u6301\uff0c\u56e0\u4e3aInnoDB\u548cMyISAM\u4e0d\u540c\uff0c\u4ed6\u7684\u6570\u636e\u6587\u4ef6\u5e76\u4e0d\u662f\u72ec\u7acb\u5bf9\u5e94\u4e8e\u6bcf\u5f20\u8868\u7684\u3002\u800c\u662f\u4f7f\u7528\u7684\u5171\u4eab\u8868\u7a7a\u95f4\uff0c\u7b80\u5355\u7684\u62f7\u8d1d\u8986\u76d6\u65b9\u6cd5\u5bf9\u4ed6\u4e0d\u9002\u7528\uff0c\u5fc5\u987b\u5728\u505c\u6389MYSQL\u540e\u5bf9\u8fdb\u884c\u6570\u636e\u6062\u590d\u3002\u4f7f\u7528Per-Table Tablespacesd\uff0c\u4f7f\u5176\u6bcf\u5f20\u8868\u5bf9\u5e94\u4e00\u4e2a\u72ec\u7acb\u7684\u8868\u7a7a\u95f4\u6587\u4ef6\uff0c\u5219\u60c5\u51b5\u8981\u7b80\u5355\u5f88\u591a\u3002

\u4e00\u822c\u6765\u8bf4\uff0c\u5982\u679c\u9700\u8981\u4e8b\u52a1\u652f\u6301\uff0c\u5e76\u4e14\u6709\u8f83\u9ad8\u7684\u5e76\u53d1\u8bfb\u5199\u9891\u7387\uff0cInnoDB\u662f\u4e0d\u9519\u7684\u9009\u62e9\u3002\u8981\u662f\u5e76\u53d1\u8bfb\u5199\u9891\u7387\u4e0d\u9ad8\u7684\u8bdd\uff0c\u5176\u5b9e\u53ef\u4ee5\u8003\u8651BDB,\u4f46\u7531\u4e8e\u5728MySQL5.1\u53ca\u5176\u4ee5\u540e\u7248\u672c\u4e2d\uff0c\u5c06\u4e0d\u518d\u63d0\u4f9bBDB\u652f\u6301\u3002\u8fd9\u4e2a\u9009\u9879\u4e5f\u5c31\u6ca1\u6709\u4e86

\u81f3\u4e8eHeap\u548cBDB\uff08Berkeley DB\uff09\uff0c\u76f8\u5bf9\u6765\u8bf4\uff0c\u666e\u53ca\u7387\u4e0d\u5982\u524d\u4e24\u79cd\uff0c\u4f46\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd8\u662f\u633a\u9002\u7528\u7684

Heap\u5b58\u50a8\u5f15\u64ce\u5c31\u662f\u5c06\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u7531\u4e8e\u6ca1\u6709\u78c1\u76d8I.\/O\u7684\u7b49\u5f85\uff0c\u901f\u5ea6\u6781\u5feb\u3002\u4f46\u7531\u4e8e\u662f\u5185\u5b58\u5b58\u50a8\u5f15\u64ce\uff0c\u6240\u505a\u7684\u4efb\u4f55\u4fee\u6539\u5728\u670d\u52a1\u5668\u91cd\u542f\u540e\u90fd\u5c06\u6d88\u5931\u3002
 
Heap\u633a\u9002\u5408\u505a\u6d4b\u8bd5\u7684\u65f6\u5019\u4f7f\u7528


BDB\u662fMySQL\u7b2c\u4e00\u6b3e\u4e8b\u52a1\u5b89\u5168\u7684\u5b58\u50a8\u5f15\u64ce\u3002\u5728Berkeley DB database library\u7684\u57fa\u7840\u4e0a\u5efa\u7acb\uff0c\u540c\u6837\u662f\u4e8b\u52a1\u5b89\u5168\u7684\uff0c\u4f46BDB\u7684\u666e\u53ca\u7387\u663e\u7136\u4e0d\u53caInnoDB\uff0c\u56e0\u4e3a\u5927\u591a\u6570\u5728MySQL\u4e2d\u5bfb\u627e\u652f\u6301\u4e8b\u52a1\u7684\u5b58\u50a8\u5f15\u64ce\u7684\u540c\u65f6\u4e5f\u5728\u627e\u652f\u6301MVCC\u6216\u662f\u884c\u7ea7\u9501\u5b9a\u5b58\u50a8\u5f15\u64ce\uff0c\u800cBDB\u53ea\u652f\u6301Page-level Lock\u3002<\/FONT><\/P>
\n

 <\/P>
\n

 <\/P>
\n

\u9644\u4e0a\u4e00\u5f20\u300aHigh Performance MySQL\u300b \u4e2d\u7684\u5404\u5b58\u50a8\u5f15\u64ce\u7684\u7279\u6027\u8868<\/P>
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n
\n

\n

Attribute<\/P><\/TH>
\n


\n

MyISAM<\/P><\/TH>
\n


\n

Heap<\/P><\/TH>
\n


\n

BDB<\/P><\/TH>
\n


\n

InnoDB<\/P><\/TH><\/TR><\/THEAD>
\n


\n

Transactions<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

Yes<\/P><\/TD>
\n


\n

Yes<\/P><\/TD><\/TR>
\n


\n

Lock granularity<\/P><\/TD>
\n


\n

Table<\/P><\/TD>
\n


\n

Table<\/P><\/TD>
\n


\n

Page (8 KB)<\/P><\/TD>
\n


\n

Row<\/P><\/TD><\/TR>
\n


\n

Storage<\/P><\/TD>
\n


\n

Split files<\/P><\/TD>
\n


\n

In-memory<\/P><\/TD>
\n


\n

Single file per table<\/P><\/TD>
\n


\n

Tablespace(s)<\/P><\/TD><\/TR>
\n


\n

Isolation levels<\/P><\/TD>
\n


\n

None<\/P><\/TD>
\n


\n

None<\/P><\/TD>
\n


\n

Read committed<\/P><\/TD>
\n


\n

All<\/P><\/TD><\/TR>
\n


\n

Portable format<\/P><\/TD>
\n


\n

Yes<\/P><\/TD>
\n


\n

N\/A<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

Yes<\/P><\/TD><\/TR>
\n


\n

Referential integrity<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

Yes<\/P><\/TD><\/TR>
\n


\n

Primary key with data<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

Yes<\/P><\/TD>
\n


\n

Yes<\/P><\/TD><\/TR>
\n


\n

MySQL caches data records<\/P><\/TD>
\n


\n

No<\/P><\/TD>
\n


\n

Yes<\/P><\/TD>
\n


\n

Yes<\/P><\/TD>
\n


\n

Yes<\/P><\/TD><\/TR>
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\n

Availability<\/P><\/TD>
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All versions<\/P><\/TD>
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All versions<\/P><\/TD>
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\n

MySQL-Max<\/P><\/TD>
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