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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [PATCH] migration: adding migration to/from a file
Date: Mon, 19 Jan 2009 00:55:57 +0000
References: <1232324325-25060-1-git-send-email-uril@redhat.com>
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To: qemu-devel@nongnu.org
Cc: Uri Lublin <uril@redhat.com>

On Monday 19 January 2009, Uri Lublin wrote:
> Migration to file, reuses migration-to-fd.
> Migration from file, uses qemu-fopen directly.
>
> The saved state-file should be used only once and removed (or used
> with -snapshot, or a the disk-image should be copied), as the
> disk image is not saved, only the VM state.
>
> Also there is not point of doing a _live_ migration to file (except
> for debugging migration code), so I recommend to stop the VM before
> migrating its state to a file.
>
> An advantage migration-to-file over savevm/loadvm is that for the latter
> a qcow2 is a requirement, while the former works for any image-format.

Wouldn't it be better to just implement savevm to file?

Paul