Veritas FlashSnap Point-In-Time Copy Solutions 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

9Point-in-time copy solutions
Software used in point-in-time copy scenarios
Note: To provide continuity of service in the event of hardware failure in a
cluster environment, you can use point-in-time copy solutions in conjunction
with the high availability cluster functionality of the HP Serviceguard Storage
Management Suite.
Point-in-time copy scenarios
Point-in-time copies of volumes allow you to capture an image of a database or
file system at a selected instant for use in applications such as backups, decision
support, reporting, and development testing.
Point-in-time copy solutions may additionally be configured to use off-host
processing to remove much of the performance overhead on a production
system.
The following chapters describe how you can use FlashSnap to implement
regular online backup of database and cluster file system volumes, to set up a
replica of a production database for decision support:
■ Online database backup
■ Off-host cluster file system backup
■ Decision support
Three types of point-in-time copy solution are considered in this document:
■ Primary host solutions where the copy is processed on the same system as
the active data. See “Implementing point-in time copy solutions on a
primary host” on page 13 for more information.
■ Off-host solutions where the copy is processed on a different system from
the active data. If implemented correctly, such solutions have almost no
impact on the performance of the primary production system. See
“Implementing off-host point-in-time copy solutions” on page 15 for more
information.
■ Using Storage Checkpoints to quickly roll back a database instance to an
earlier point in time. See “Database recovery” on page 57 for more
information.
Software used in point-in-time copy scenarios
This guide provides a number of example scenarios that illustrate how to
implement point-in-time copy solutions by using the HP Serviceguard Storage
Management Suite.
The following non-cluster specific components are used in the sample scenarios: