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Re: [Xen-users] iSCSI and LVM

from [Javier Guerra Giraldez] [Permanent Link][Original]
To: Jonathan Dye <jdye@xxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] iSCSI and LVM
From: Javier Guerra Giraldez <javier@xxxxxxxxxxx>
Date: Wed, 16 Jun 2010 10:44:19 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx, Igor Shalakhin <igor@xxxxxxxxx>
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On Wed, Jun 16, 2010 at 10:18 AM, Jonathan Dye
<jdye@xxxxxxxxxxxxxxxxxxxxx> wrote:
> in fact that's exactly right.  ZFS is build around copy-on-write semantics.   
> snapshot writes are no more expensive than filesystem writes.

it does COW on metadata.  normal writes shouldn't copy since there's
nothing to preserve.

-- 
Javier

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