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If you need to back up large amounts of data and the backup window presents
a problem, consider backing up to disk-based devices and using advanced backup
strategies such as synthetic backup and disk staging.
• How can I prepare running applications for backups? Many applications keep
files open, so running a backup would produce an inconsistent backup. This can
be avoided by using pre-exec and post-exec scripts that can be used to synchronize
the status of applications with the backup activities.
Duplicating backed up data
Duplicating backed up data brings several benefits. You can copy data to improve
its security and availability, or for operational reasons.
Data Protector provides the following methods of duplicating backed up data: object
copy, object mirror, and media copy. See Table 9 on page 112 for an overview of
the main characteristics of these methods.
Table 9 Data Protector data duplication methods
Smart Media
Copy
Media copyObject mirrorObject copy
An entire
medium
An entire
medium
A set of objects
from a backup
session
Any
combination of
object versions
from one or
several backup
sessions
What is
duplicated
Any time after
the completion
of a backup
Any time after
the completion
of a backup
During backupAny time after
the completion
of a backup
Time of
duplication
Are different as
disk-based
storage is
combined with
tape-based
storage
Must be the
same
Can be differentCan be differentMedia type of
source and
target media
Must be the
same
1
Must be the
same
Can be differentCan be differentSize of source
and target
media
Planning your backup strategy112