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Re: [Qemu-devel] [qemu-img] support for XVA

From: Eric Blake
Subject: Re: [Qemu-devel] [qemu-img] support for XVA
Date: Wed, 15 Nov 2017 11:33:29 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

[adding libguestfs]

On 11/15/2017 09:52 AM, Gandalf Corvotempesta wrote:
> I'm thinking if support for XVA files could be added to qemu-img
> The file-format is well known (it's just a tar archive) and there are scripts
> that are able to convert an XVA file to a RAW image. (ie:
> https://gist.github.com/miebach/0433947bcf053de23159)
> Running these script on their own is very time consuming, as you have to
> extract the XVA, convert any disk image from "single chunks" to a raw image
> and then use qemu-img to convert from raw to qcow.
> Maybe a native support will be able to skip some steps. (like the
> conversion from
> "single chunks" to raw and raw to qcow2)

Another possibility might be writing an nbdkit plugin that can directly
read XVA, then you can connect qemu to the NBD server provided by
nbdkit, without having to teach qemu proper how to read the file.

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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