zfs discuss - Feb 2010 - snapshot and space reservation

Hi,
Another question regarding snapshot.
If there is no space in zfs pool, will a write to zfs fail ? Is there a way to
reserve space in zfs pool to be used by snapshot or clone?

Regards
Victor
-- 
This message posted from opensolaris.org

On Feb 23, 2010, at 6:24 PM, v wrote:
> Hi,
> Another question regarding snapshot.
> If there is no space in zfs pool, will a write to zfs fail ?
Of course.
> Is there a way to reserve space in zfs pool to be used by snapshot or
clone?
Snapshots are read only, so no need for a reservation.
Clones can be given reservations.

NB, there are two kinds of reservations:
	reservations  work on the dataset size
	refreservations work on the dataset and snapshots sizes
the two differ in the accounting of snapshots.

For more information, see the "Setting ZFS Quotas and Reservations" in
the
ZFS Administration Guide.
 -- richard

ZFS storage and performance consulting at http://www.RichardElling.com
ZFS training on deduplication, NexentaStor, and NAS performance
http://nexenta-atlanta.eventbrite.com (March 16-18, 2010)