[linux-lvm] Using LVM Mirroring to obtain a usable backup
Brian J. Murrell
brian at interlinx.bc.ca
Thu Sep 17 23:48:07 UTC 2009
On Thu, 2009-09-17 at 18:49 -0400, Stuart D. Gathman wrote:
>
> 1) Eventually you still need to copy the snapshot to a normal LV to get
> your performance back
Will you? When you are using the snapshot instead of the origin, you
are writing to the COW already, not writing to the origin which requires
a COW copy-out.
> 2) (minor, but important) Another FAQ is "exactly how big do I need to make my
> snapshot so that it is guaranteed never to overflow".
Heh. Yeah.
b.
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