On Thu, Mar 31, 2016 at 1:16 PM, Grundmann, Christian < christian.grundm...@fabasoft.com> wrote:
> Hi, > > @1. Did you use the hook? > > yes, without the hook fstrim would not start, > > @2. Where did you see it's the same size? Should be looked at from the > storage side (assuming, btw, it supports discard!) > > I looked at the “actual Size” under Storage > I'm unsure if that size should change - we've allocated blocks, they are still allocated from our perspective. From the storage point of view, there's a hole that can be used for other purposes. I'd look on the storage side. > > > I don’t know how ovirt handles FC storage and if this will allow discard. > It doesn't really care - thee discard should be passed to the underlying storage. Most should support UNMAP these days. But you can easily check, I assume with a small test (use sg3_utils for example). Y. > > Thx > > Christian > > > > > > *Von:* Yaniv Kaul [mailto:yk...@redhat.com] > *Gesendet:* Donnerstag, 31. März 2016 12:13 > > *An:* Grundmann, Christian <christian.grundm...@fabasoft.com> > *Cc:* users@ovirt.org > *Betreff:* Re: [ovirt-users] Reclaim disk space of thin disks > > > > > > > > On Thu, Mar 31, 2016 at 1:05 PM, Grundmann, Christian < > christian.grundm...@fabasoft.com> wrote: > > Hi, > > seems not to work with FC Storage, > > > > I Zero filled the Disk with dd, removed the file and did a fstrim which > told me it trimmed the right amount of space, > > But the disk Image stays full size. > > > > 1. Did you use the hook? > > 2. Where did you see it's the same size? Should be looked at from the > storage side (assuming, btw, it supports discard!) > > Y. > > > > > > Thx > > Christian > > > > *Von:* Yaniv Kaul [mailto:yk...@redhat.com] > *Gesendet:* Mittwoch, 30. März 2016 22:29 > *An:* Grundmann, Christian <christian.grundm...@fabasoft.com> > *Cc:* users@ovirt.org > *Betreff:* Re: [ovirt-users] Reclaim disk space of thin disks > > > > > > > > On Wed, Mar 30, 2016 at 10:04 AM, Grundmann, Christian < > christian.grundm...@fabasoft.com> wrote: > > Hi, > > is there a way to „shrink“ a thin disk image to reclaim deleted space like > using virt-sparsify? > > > > Yes, if the underlying file system supports it (NFS, for example, might > need to be 4.2 and above). > > > > Or can it be done by making a snapshot and clone the VM to a new one? > > > > Another suggestion: use the VDSM hooks for discard ('diskunmap') and run > 'fstrim' from within the guest. > > Y. > > > > > > Thanks a lot > > Christian > > > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > > > >
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