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Re: [Xen-devel] [PATCH] Blktap: Userspace file-based image support.(RFC)

To: Jerone Young <jyoung5@xxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Blktap: Userspace file-based image support.(RFC)
From: "Stephen C. Tweedie" <sct@xxxxxxxxxx>
Date: Mon, 03 Jul 2006 15:52:08 +0100
Cc: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Julian Chesterfield <julian.chesterfield@xxxxxxxxxxxx>, NAHieu <nahieu@xxxxxxxxx>, Andrew Warfield <andrew.warfield@xxxxxxxxxxxx>, Dan Smith <danms@xxxxxxxxxx>
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On Fri, 2006-06-30 at 17:15 -0500, Jerone Young wrote:

> I would ask how exactly do you propose to do this ? Today at least
> file-backed domains seems to be the only real world way of doing
> migrations. Migrating block devices seems a little hairy (what if the
> other machine is already using sda for example), and may not be all the
> practical to do.

The practicality of it is certainly a concern; but for businesses with
SANs already deployed that's less of an issue.  The issue of multiple
users exists for files just as much as for devices, though.


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