Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

Setting up volumes for

instant snapshots

This chapter includes the following topics:

■ About setting up volumes for instant snapshots

■ Additional preparation activities

■ Preparing a volume for instant snapshot operations

■ Creating a volume for use as a full-sized instant snapshot

■ Creating a shared cache object

About setting up volumes for instant snapshots

This chapter describes how to make volumes ready for instant snapshot creation.

These may be volumes that you want to back up, or that you want to use for

decision support or reporting.

If a snapshot volume is to be used on the same host, and will not be moved to

another host for off-host processing, you can use space-optimized instant

snapshots rather than full-sized instant snapshots. Depending on the application,

space-optimized snapshots typically require 10% of the disk space that is required

for full-sized instant snapshots.

For information on administering instant snapshots and FastResync, see the

Veritas Volume Manager Administrator’s Guide.

Table 12-1 summarizes which volumes require the creation of snapshot mirrors

for backup, decision support, and database error recovery.

Chapter