January 18, 2012

Mysql存储引擎特性比较

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下表列出了Mysql 主要数据引擎架构(如myisam、innodb Storage Engine )的特性比较：

Feature	MyISAM	NDB	Archive	InnoDB	Memory
Storage Limits	No	Yes	No	64TB	Yes
Transactions	No	Yes	No	Yes	No
Locking granularity	Table	Row	Row	Row	Table
MVCC snapshot read	No	No	No	Yes	No
Geospatial support	Yes	No	Yes	Yes	No
Data caches	No	Yes	No	Yes	NA
Index Caches	Yes	Yes	No	Yes	NA
Compressed Data	Yes	No	Yes	No	No
Storage cost (relative to other engines)	Small	Med	Small	Med	NA
Memory cost (relative to other engines)	Low	High	Low	High	High
Bulk insert speed	High	High	Highest	Med	High
Replication Support	Yes	Yes	Yes	Yes	Yes
Foreign Key support	No	No	No	Yes	No
Built-in Cluster/High-availability support	No	Yes	No	No	No

Dynamically add and remove storage engines.
Change the storage engine on a table with “ALTER TABLE …”

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