From: Dave Wysochanski <dwysocha@redhat.com>
To: lvm-devel@redhat.com
Subject: lvcreate -s - why specifying size for snapshot ?
Date: Fri, 20 Mar 2009 12:15:23 -0400 [thread overview]
Message-ID: <1237565723.2493.13.camel@f10-node1> (raw)
In-Reply-To: <37d33d830903200847w45cee0b1xc973299627dead2f@mail.gmail.com>
On Fri, 2009-03-20 at 21:17 +0530, Sandeep K Sinha wrote:
> Hi all,
> Disk
> After hunting for relevant documents and failing to find one.
> I would like to know if its not true that the size of the snapshot
> should be equal to the original volume?
> If so, then why do we accept size for a snapshot?
>
> Or Am I missing something somewhere else?
>
The size for the snapshot is the exception store - basically the blocks
that get modified need some place to be stored. This is why you need a
separate size for snapshot LV which may be very different (usually much
smaller) than the original LV.
prev parent reply other threads:[~2009-03-20 16:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-20 15:47 lvcreate -s - why specifying size for snapshot ? Sandeep K Sinha
2009-03-20 16:10 ` Bryn M. Reeves
2009-03-20 16:18 ` Jonathan Brassow
2009-03-20 16:40 ` Sandeep K Sinha
2009-03-20 17:07 ` Bryn M. Reeves
2009-03-20 17:33 ` Bryn M. Reeves
2009-03-20 17:38 ` Sandeep K Sinha
2009-03-20 17:37 ` Bryn M. Reeves
2009-03-20 17:12 ` Jonathan Brassow
2009-03-20 16:15 ` Dave Wysochanski [this message]
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