unexpectedly and is allocated again?
If it was not accessing the image from more than one process, any other
exceptions I can test for?
Thanks
leijian
From: Eric Blake
Date: 2015-04-07 23:27
To: Kevin Wolf; leijian
CC: qemu-devel; stefanha
Subject: Re: [Qemu-devel] [Snapshot Bug?]Qcow2 meta data
On 04/07/2015 03:33 AM, Kevin Wolf wrote:
> More specifically, did you take care to never access your image from
> more than one process (except if both are read-only)? It happens
> occasionally that people use 'qemu-img snapshot' while the VM is
> running. This is wrong and can corrupt the image.
Am 03.04.2015 um 12:04 hat leijian geschrieben:
> Hi all,
>
> There was a problem about qcow2 image file happened in my serval vms and I
> could not figure it out,
> so have to ask for some help.
> [...]
> I think the problem is relate to the snapshot create, delete. But I cant
> reproduce it .
2011/3/31 涂化衍 :
> Dear Mr/Miss,
It's Mr :)
> Thanks for your information. We have already found "something" in this path.
> But, this problem is still alive. We can't restore this virtual machine on
> another physical machine from host A to host B by using snapshot
I might misunderstood your pro
On Thu, Mar 31, 2011 at 13:39, 涂化衍 wrote:
> Dear all,
>
> I have a question to use the qemu-snapshot.
> While I create a snapshot file, and use it to restore my vm, everything is
> okay.
> But, I can't find the temp_snapshot file on my system. It seems like a
> invisit file.
> How can I get it in
Am 16.12.2010 19:16, schrieb Stefan Weil:
> Am 16.12.2010 18:45, schrieb Stefan Hajnoczi:
>> On Thu, Dec 16, 2010 at 4:34 PM, Amador Pahim wrote:
>>> Thank you for your answer. Just one more question: If, while my
>>> "snapshot" vms are running, the main disk is modified by a non
>>> "snapshot" vm
Thanks. Some stuff are clear now. I started a VDI Open Source project
(http://www.ucs.br/projeto/osdvt/) and your information will help a
lot.
Pahim
On Thu, Dec 16, 2010 at 4:16 PM, Stefan Weil wrote:
> Am 16.12.2010 18:45, schrieb Stefan Hajnoczi:
>>
>> On Thu, Dec 16, 2010 at 4:34 PM, Amador P
Am 16.12.2010 18:45, schrieb Stefan Hajnoczi:
On Thu, Dec 16, 2010 at 4:34 PM, Amador Pahim wrote:
Thank you for your answer. Just one more question: If, while my
"snapshot" vms are running, the main disk is modified by a non
"snapshot" vm? For example, installing some extra software.. this can
On Thu, Dec 16, 2010 at 4:34 PM, Amador Pahim wrote:
> Thank you for your answer. Just one more question: If, while my
> "snapshot" vms are running, the main disk is modified by a non
> "snapshot" vm? For example, installing some extra software.. this can
> freeze vms or something?
Correct, it is
Hello Stefan,
Thank you for your answer. Just one more question: If, while my
"snapshot" vms are running, the main disk is modified by a non
"snapshot" vm? For example, installing some extra software.. this can
freeze vms or something?
Regards,
Pahim
On Thu, Dec 16, 2010 at 2:28 PM, Stefan Hajno
On Thu, Dec 16, 2010 at 4:21 PM, Amador Pahim wrote:
> Is a bad idea if I run multiples "qemu" vms pointing to the same disk
> img using "-snapshot" parameter? What kind of problem may I have?
It should work fine. -snapshot means that QEMU creates a temporary
qcow2 file backed by the disk image
savevm will take disk snapshot also, then you can copy the snapshot
out of disk image to another storage.
I had posted two patches about it:
http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg01662.html
and http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg00655.html.
FYI.
BTW, if
> From: Michael McConnell
> On Sat, 18 Nov 2006, Ottavio Caruso wrote:
>
> > Are the writes to tmpfs (in a *nix guest OS) recorded to the
> > snapshotted image?
> >
> > Example: /var/run on tmpfs
> > OS writes to /var/run. Bigger temp file or not?
>
> This isn't a guaranteed certain answer, bu
On Sat, 18 Nov 2006, Ottavio Caruso wrote:
> Are the writes to tmpfs (in a *nix guest OS) recorded to the
> snapshotted image?
>
> Example: /var/run on tmpfs
> OS writes to /var/run. Bigger temp file or not?
This isn't a guaranteed certain answer, but IIRC tmpfs uses system RAM and
swap as its
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