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Re: [Qemu-devel] Can qemu reopen image files?
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] Can qemu reopen image files? |
Date: |
Mon, 19 Dec 2016 13:55:29 +0000 |
User-agent: |
Mutt/1.7.1 (2016-10-04) |
On Mon, Dec 19, 2016 at 09:07:43AM +0800, Fam Zheng wrote:
> On Sun, 12/18 20:52, Christopher Pereira wrote:
> > Hi,
> >
> > We are doing a "qemu-img convert" operation (qcow2, with compression) to
> > shorten the backing-chain (in the middle of the backing-chain).
> > In order to force qemu to reopen files, we do a save and restore operation.
> > Is there a faster way to reopen image files using virsh or qemu?
>
> No, don't use qemu-img when the image is in use by QEMU. You want to use
> "block-commit" command provided by QMP.
It's worth being more explicit here:
You will corrupt the image file if you access it with another program
while QEMU is using it!
Stefan
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- [Qemu-devel] Can qemu reopen image files?, Christopher Pereira, 2016/12/18
- Re: [Qemu-devel] Can qemu reopen image files?, Fam Zheng, 2016/12/18
- Re: [Qemu-devel] Can qemu reopen image files?,
Stefan Hajnoczi <=
- Re: [Qemu-devel] Can qemu reopen image files?, Christopher Pereira, 2016/12/19
- Re: [Qemu-devel] Can qemu reopen image files?, Eric Blake, 2016/12/19
- Re: [Qemu-devel] Can qemu reopen image files?, Christopher Pereira, 2016/12/19
- Re: [Qemu-devel] Can qemu reopen image files?, Christopher Pereira, 2016/12/28
- Re: [Qemu-devel] Can qemu reopen image files?, Eric Blake, 2016/12/29
- Re: [Qemu-devel] Can qemu reopen image files?, Eric Blake, 2016/12/29
- Re: [Qemu-devel] Can qemu reopen image files?, Eric Blake, 2016/12/29
- Re: [Qemu-devel] Can qemu reopen image files?, Eric Blake, 2016/12/29