VERITAS FlashSnap Point-In-Time-Copy Solutions Administrator's Guide

VERITAS Software Used in Point-In-Time Copy Scenarios
8 VERITAS FlashSnap Point-In-Time Copy Solutions Administrator’s Guide
◆ After creating a Storage Checkpoint of a mounted file system, you can continue to create,
remove, and update files on the file system without affecting the image of the Storage
Checkpoint.
◆ Unlike file system snapshots, Storage Checkpoints are writable.
◆ To minimize disk space usage, Storage Checkpoints use free space in the file system.
Storage Checkpoints and the Storage Rollback feature of VERITAS Storage Foundation for
Databases enable rapid recovery of databases from logical errors such as database corruption,
missing files and dropped table spaces. You can mount successive Storage Checkpoints of a
database to locate the error, and then roll back the database to a Storage Checkpoint before the
problem occurred. For more information, see “Database Recovery” on page 61 and the VERITAS
Storage Foundation Administrator’s Guide.
VERITAS NetBackup for Oracle Advanced BLI Agent uses Storage Checkpoints to enhance the
speed of backing up Oracle databases. For more information, see the VERITAS NetBackup for
Oracle Advanced BLI Agent System Administrator’s Guide.
For more information about the implementation of Storage Checkpoints, see the VERITAS File
System Administrator’s Guide.
VERITAS FlashSnap Agent for Symmetrix
The EMC TimeFinder product from EMC is a business continuance solution that allows you to
create and use copies of EMC Symmetrix devices while the standard devices remain online and
accessible. Business Continuance Volume (BCV) devices contain copies of Symmetrix standard
(STD) devices and provide redundancy. You can temporarily detach the BCV mirrors and use the
BCVs to perform backups, testing, and other administrative tasks.
VERITAS FlashSnap Agent for Symmetrix provides a set of commands that allow you to use the
EMC TimeFinder split and restore operations in conjunction with VxFS file systems and VxVM
disk groups and volumes that have been created on Symmetrix STD devices.
You can use the commands in VERITAS FlashSnap Agent for Symmetrix to:
◆ Associate a disk group with a BCV disk group, or Symmetrix STD devices in a disk group
with identical BCV devices.
◆ Initiate TimeFinder mirroring for Symmetrix STD devices in a disk group.
◆ Split Symmetrix STD devices from their BCV devices and create duplicate volumes on the
BCV devices. You can use the resulting BCV volumes for administrative tasks such as backups
and testing.
◆ Reattach and resynchronize the STD and BCV devices. The devices can be remirrored from
the STD copy or restored from the BCV copy.
◆ Detach the STD devices from their BCV devices.