Creating Snapshots - Overland Storage SnapServer Administrator's Manual

SnapServer 7.0 Administrator's Guide
Action
Edit a Snapshot Schedule Click the
Adjust Snapshot Space
Edit, Delete, or Roll Back
a Snapshot
Clicking the Refresh button updates the data shown. This is helpful when waiting for a
snapshot to complete.
When single snapshots are originally created or while recurring snapshots are active, a
refresh icon (
in the table is being refreshed every 5 minutes.
Clicking the Close button returns you to the Storage home page.
NOTE: The presence of one or more snapshots on a volume (Traditional RAID) or storage pool

Creating Snapshots

Creating a snapshot involves first defining the snapshot and then scheduling the snapshot.
For regular data backup purposes, create a recurring snapshot. A recurring snapshot
schedule works like a log file rotation, where a certain number of recent snapshots are
automatically generated and retained as long as possible, after which the oldest snapshot is
discarded. You can also create individual, one-time-only snapshots as needed.
NOTE: If you have created a new volume or have numerous existing snapshots, make sure you
Scheduling Snapshots
Snapshots should ideally be taken when your system is idle. It is recommended that
snapshots be taken before a backup is performed. For example, if your backup is scheduled
at 4 a.m., schedule the snapshot to be taken at 2 a.m., thereby avoiding system activity and
ensuring the snapshot is backed up. See
information.
Snapshots and Backup Optimization
When you back up a live volume directly, files that reference other files in the system may
become out-of sync in relation to each other. The more data you have to back up, the more
time is required for the backup operation, and the more likely these events are to occur. By
backing up the snapshot rather than the volume itself, you greatly reduce the risk of
archiving inconsistent data. For instructions, see
10400317-001 10/2011
Procedure
name. You can modify all snapshot parameters.
Click the
snapshot space you want to adjust. You can adjust the amount of
space allotted for snapshots on each RAID set or RAID set group.
Click the snapshot's name to open the Snapshot Properties page. You
can edit the snapshot's name and duration, roll back the snapshot to a
volume, or delete the snapshot.
) is displayed to the right on the tab bar. It indicates that the snapshot data
(DynamicRAID) can impact write performance. Additional snapshots taken of the same
volume or storage pool do not have additional impact; in other words, the write
performance impact of one snapshot on a volume is the same as the impact of 100
snapshots on the same volume.
have enough space allocated in the snapshot space; otherwise, you will not be able to
create the snapshot.
©2010-11 Overland Storage, Inc.
Snapshot Schedules button, and then click the snapshot
Snapshot Space button, then click the RAID set name for the
"Schedule Snapshots" on page 6-5
"Schedule Snapshots" on page
6 – Other Storage Options
for more
6-5.
6-3