Source Volumes For Tape Backups; Data Preservation Before Upgrading Software; Automated Backups; Planning How Many Snapshots - HP StorageWorks P4000 User Manual

NOTE:
When considering the size of snapshots in the cluster, remember that the data protection level of the
volume is duplicated in the snapshot.

Source volumes for tape backups

Best practice
Plan to use a single snapshot and delete it when you are finished. Consider the following question in
your planning. Is space available on the cluster to create the snapshot?

Data preservation before upgrading software

Best practice
Plan to use a single snapshot and delete it when you are finished. Consider the following question in
your planning. Is space available on the cluster to create the snapshot?

Automated backups

Best practice
Plan to use a series of snapshots, deleting the oldest on a scheduled basis. Consider the following
questions in your planning.
• Is space available on the cluster to create the snapshots?
• What is the optimum schedule and retention policy for this schedule to snapshot a volume? See
"Planning
tions.
For example, if you are using these backups as part of a disaster recovery plan, you might
schedule a daily snapshot of the volume and retain 7 copies. A second schedule would run weekly
and retain 5 copies. A third schedule would run monthly and keep 4 copies.

Planning how many snapshots

For information about the recommended maximum number of volumes and snapshots that can be
created in a management group, see
8 on page 145.

Creating a snapshot

Create a snapshot to preserve a version of a volume at a specific point in time. For information about
snapshot characteristics, see
1. Log in to the management group that contains the volume for which you want to create a new
snapshot.
2. Right-click the volume, and select New Snapshot.
snapshots" on page 214 for the average daily change rates for some common applica-
"Guide for
"Configuration Summary
snapshots" on page 214.
P4000 SAN Solution user guide
overview" on page 151 and Chapter
215