I have attached 7TB disk ( pre allocated) for VM ( Redhat 8 ).. Due to some space issue we have unattached disk from VM and deleted it.

We have enabled both options discard-after delete and wipe after delete but nothing is working , I have tried to creating small disk ( like 1 GB ). after deleting that disk space has reclaimed succsuuufully. Seems this happens for larger size disk

On Mon, Jul 12, 2021 at 1:10 AM Nir Soffer <nsoffer(a)redhat.com&gt; wrote: > > On Sun, Jul 11, 2021 at 5:03 PM Ranesh Tharanga Perera > <raneshtharanga(a)gmail.com&gt; wrote: > > > > I have attached 7TB disk ( pre allocated) for VM ( Redhat 8 ).. Due to some space issue we have unattached disk from VM and deleted it. > > Did you enable the "discard after delete" option in the storage domain > advanced options? > > If you did not, the logical volume is deleted, but the blocks allocated on the > server side from this logical volume are not discarded. > > Since you deleted the logical volume, it is not possible to discard it > now, but you > do this: > > Try this: > - Put the storage domain to maintenance > - Enable "discard-after delete" > - Active the storage domain > - Create new raw preallocated disk filling the entire domain > - Delete the disk > > Nir

Many thanks for the info. We don't need that option. How we can disable that? just only uncheck that property box ? Is there any downtime? What happens if we delete that VM and recreate it? All space will reclaim?

Thanks, Ranesh.. On Mon, Jul 12, 2021 at 3:46 AM Nir Soffer <nsoffer(a)redhat.com&gt; wrote: > > On Mon, Jul 12, 2021 at 12:27 AM Ranesh Tharanga Perera > <raneshtharanga(a)gmail.com&gt; wrote: > > > > We have enabled both options discard-after delete and wipe after delete but nothing is working , I have tried to creating small disk ( like 1 GB ). after deleting that disk space has reclaimed succsuuufully. > > Seems this happens for larger size disk > > If it worked for 1g disk, it should work for a bigger disk. > > If you can reproduce this again, please file a ovirt/vdsm bug and attach > vdsm logs and /var/log/messages (or output of journalcltl). > > BTW, do you have a real need for wipe-after-delete? This can make > deletion much slower, since it may need to allocate the entire disk on > the server side for writing zeroes just to deallocate all space right > after that when we discard the disk. > > This option is needed only if you want to ensure that sensitive data > cannot leak to another disk on the same storage, maybe used by > another tenant. > > > On Mon, Jul 12, 2021 at 1:10 AM Nir Soffer <nsoffer(a)redhat.com&gt; wrote: > >> > >> On Sun, Jul 11, 2021 at 5:03 PM Ranesh Tharanga Perera > >> <raneshtharanga(a)gmail.com&gt; wrote: > >> > > >> > I have attached 7TB disk ( pre allocated) for VM ( Redhat 8 ).. Due to some space issue we have unattached disk from VM and deleted it. > >> > >> Did you enable the "discard after delete" option in the storage domain > >> advanced options? > >> > >> If you did not, the logical volume is deleted, but the blocks allocated on the > >> server side from this logical volume are not discarded. > >> > >> Since you deleted the logical volume, it is not possible to discard it > >> now, but you > >> do this: > >> > >> Try this: > >> - Put the storage domain to maintenance > >> - Enable "discard-after delete" > >> - Active the storage domain > >> - Create new raw preallocated disk filling the entire domain > >> - Delete the disk > >> > >> Nir > _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/CQKAZBOHAPR...