[PVE-User] sparse and compression
f.gruenbichler at proxmox.com
Mon Dec 11 15:29:04 CET 2017
On Mon, Dec 11, 2017 at 03:23:34PM +0100, Miguel González wrote:
> >> Can I change a zpool to sparse on the fly or do I need to turn off all
> >> VMs before doing so?
> > sparse will only affect newly created volumes. you can "convert" sparse
> > volumes to fully reserved ones and vice versa manually though.
> how can I convert manually from non-sparse to sparse? Creating a new
> zpool and copy disk with dd? Or any other easier way?
(un)set the reservations appropriately. like I said, "sparse" is
entirely virtual for ZFS, the only difference is whether the full size
is reserved upon creation or not.
> >> Why a virtual disk shows as 60G when originally It was 36 Gb in raw format?
> >> NAME USED AVAIL REFER MOUNTPOINT
> >> rpool/data/vm-102-disk-1 60.0G 51.3G 20.9G -
> > wild guess - you are using raidz of some kind? ashift is set to 12 /
> > auto-detected?
> Yes, raid1
> Thanks for your promptly reply!
raid1 (aka mirror)? or raidZ-1 ? those are two very different things ;)
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