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Subject: Re: [linux-lvm] Using LVM Mirroring to obtain a usable backup
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On Thu, 2009-09-17 at 18:49 -0400, Stuart D. Gathman wrote:
>=20
> 1) Eventually you still need to copy the snapshot to a normal LV to get=20
> 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 ma=
ke my
> snapshot so that it is guaranteed never to overflow".

Heh.  Yeah.

b.


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