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本帖最后由 emperor 于 2012-02-05 19:43 编辑
ls的说法很意识流
请lz参照如下链接
http://www.pcguide.com/ref/hdd/p ... s/perfStripe-c.html
并关注DB2 FAQ提及的
--When using a RAID device for tablespaces, what should I set the EXTENTSIZE of the tablespace to?
It is recommended that you set the EXTENTSIZE to match the stripe set of the RAID device for efficient data retrieval. Further tuning may be required depending on benchmark tests run on your individual systems.
Example:-
If you have a RAID 5 (4+1) system with 128k strip size you could set your EXTENTSIZE at 64k and your PAGESIZE at 8k. (as a rule of thumb, EXTENTSIZE X PAGESIZE - 64X8, should equal to strip size X no of disks, - 128X4)
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