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 .
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.
Here is the thing:
At first, I found there were some data corruption in a vm, so I did qemu-img
check to all my vms.
parts of check report:
3-Leaked clust
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.
Here is the thing:
At first, I found there were some data corruption in a vm, so I did qemu-img
check to all my vms.
parts of check report:
3-Leaked clust
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
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 my system. Or, could you show me how to fetch it?
Thanks,
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
Hello,
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?
Thanks,
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
Hi there,
we've been using qemu for quite a while on different platforms and we'd like to
perform snapshots on running qemu machines and tar them onto a backup server.
The qemu-img snapshot can only be applied to inactive qemu machines (images),
hence this is not applicable. The savevm command w
> 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
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?
Thank you
Ottavio
Sponsored Link
Compare mortgage r
Hello qemu-devel,
I'm trying to determine whether the -snapshot option is a valid one
to minimize writes to disk (in my case a flash drive). In particular
I wonder if the final write, that is the one you do with the 'commit
hda' in the qemu monitor, is the exact sum of all the individual
writes or
So I'm very unfamiliar with the QEMU codebase, but it seems like there
was a bug introduced recently that causes -snapshot to no longer work.
Maybe I'm missing something, and the semantics have just changed
since multiple snapshot support?
Anyway, rev 1.29 to block.c
(http://cvs.savannah.gnu.org/
22 matches
Mail list logo
