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Re: [linux-lvm] LVM mirroring questions...



On Apr 11, 2008, at 9:18 AM, Luca Berra wrote:
this is not entirely correct.
md has a bitmap feature that is used to track which blocks are out of
sync.
For the record, this is called a "write-intent bitmap".  It's very handy, although to make it really perform you need to put it on a separate spindle from the data (which is supported).  Otherwise the extra seeks cause quite an impact on disk performance.



-- 
Jayson Vantuyl
Systems Architect
1 866 518 9275 ext 204


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