search for: lvmthin

...ate and manage lvm thin snapshots, however it seems it's build scripts are broken on rhel8/centos8 since they've dropped btrfs. In the interim I've applied an (ugly) hack to make the smbsnap script ( https://wiki.samba.org/index.php/Rotating_LVM_snapshots_for_shadow_copy ) work with lvmthin (and centos's version of the lvm tools), and am making some alterations to make that hack safe, as well as improve the expiry mechanism. So far it's working exceedingly well, but, before I get too deep, is there some other snapshot management software others are using to create / mount /...

...raw true | - unsupported > > > > The only case when selecting the sparse value is useful is raw file > > on file based storage domain, allowing creation of sparse or preallocated > > disk. > > I don't think this is true. Both LVs (lvmthin) and SAN LUNs can > support sparse allocation meaningfully. "sparse" is just another way for selecting "thin" or "preallocated" allocation policy. In oVirt we emulate thin volume on block storage using regular logical volumes. lvmthin does not support sharing a l...

...unsupported > block raw true | - unsupported > > The only case when selecting the sparse value is useful is raw file > on file based storage domain, allowing creation of sparse or preallocated > disk. I don't think this is true. Both LVs (lvmthin) and SAN LUNs can support sparse allocation meaningfully. In any case it sounds like we need to know if the storage domain corresponds to file or block storage, or else just force non-sparse everywhere. I'm going to force non-sparse for now, and add an 'XXX' comment about it. > I...

On Sun, Mar 25, 2018 at 2:41 PM Richard W.M. Jones <rjones@redhat.com> wrote: > On Sat, Mar 24, 2018 at 10:36:06PM +0000, Nir Soffer wrote: > > On Thu, Mar 22, 2018 at 5:25 PM Richard W.M. Jones <rjones@redhat.com> > > wrote: > > > > > PROBLEMS: > > > - -of qcow2 does not work, with multiple problems > > > * needs to set NBD size to