Hi Wei,

thanks for you shared information. As always really helpfull.

Regards

Am Mi., 14. Dez. 2022 um 20:59 Uhr schrieb Wei ZHOU <ustcweiz...@gmail.com>:

> Exactly.
>
> You can use 'qemu-img convert' to recreate the image.
>
> If you use recent libvirt/qemu and guest os, you can use volume snapshot on
> running vms, the memory will be lost but image will not be touched. see
> https://github.com/apache/cloudstack/pull/5297
>
> -Wei
>
> On Thursday, 8 December 2022, vas...@gmx.de <vas...@gmx.de> wrote:
>
> > Hi Wei,
> >
> > indeed. I am using snapshots every now and then, but i delete them quiet
> > fast.
> > From your question i would assume that the vm-snapshots are 'expending'
> the
> > Root-volume of the VM and when deleting the snapshot the volume won't be
> > shrinked to the "original" size?
> >
> > Regards,
> > Chris
> >
> > Am Do., 8. Dez. 2022 um 22:31 Uhr schrieb Wei ZHOU <
> ustcweiz...@gmail.com
> > >:
> >
> > > Do you use vm snapshot or download volume of running vms ?
> > >
> > > -Wei
> > >
> > >
> > > On Thursday, 8 December 2022, vas...@gmx.de <vas...@gmx.de> wrote:
> > >
> > > > Hi everyone,
> > > >
> > > > today i found some strange things going on in my setup and i
> currently
> > > > lacking a idea where to start looking for debugging.
> > > >
> > > > Running currently CS 4.17.0.1 i noticed that the actual on-disk-size
> on
> > > our
> > > > nfs-storage isn't matching the configured volume-size in CS
> Management.
> > > > We are using kvm only.
> > > > As of now i found multiple machines which are using a 50GB sized
> > service
> > > > offering for creation of root volume, which are bigger then 100GB on
> > the
> > > > actual storage.
> > > >
> > > > Connecting into the VMs and checking the amount of storage the VM is
> > > > thinking it is using is even less; for example:
> > > >
> > > > VM with 50GB thin provisioned root volume; shown correctly in mgmt
> and
> > db
> > > > -> used ammount of storage according to OS: 21GB of 50GB -> size on
> > > > nfs-storage for the volume-file: 120GB
> > > >
> > > > I checked the values inside the CS DB as well as the settings for the
> > > > serviceofferings and everything seems to be completely fine.
> > > > Also the nfs server settings are looking good.
> > > >
> > > > Did anybody has a suggestion on where to look into? As of know it
> > seems i
> > > > am waisting a lot of storage without any particular reason.
> > > > Regards.
> > > >
> > >
> >
>

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