RE: [Xen-devel] Re: [PATCH 0 of 6] dm-userspace xen integrationp

To:	"Dan Smith" <danms@xxxxxxxxxx>, "Julian Chesterfield" <jac90@xxxxxxxxx>
Subject:	RE: [Xen-devel] Re: [PATCH 0 of 6] dm-userspace xen integrationpatches
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Tue, 29 Aug 2006 15:42:46 +0100
Cc:	Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic:	[Xen-devel] Re: [PATCH 0 of 6] dm-userspace xen integrationpatches

> Right, but we are interested in CoW between two block 
> devices.  That's why we have created a special CoW format 
> (qcow wastes a lot of space to do sparse allocation, which is 
> pointless and slow on a block device).  We looking to support 
> things like using two iSCSI block devices to do CoW 

What data structure / format are you using for storing the CoW data?

Ian 

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RE: [Xen-devel] Re: [PATCH 0 of 6] dm-userspace xen integrationpatches