NetBackup Properties
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D
For example, assume that drives C and D are being backed up. Here, Open
Transaction Manager:
1. Takes a snapshot of C and D.
2. Backs up C and then backs up D.
3. Discards the snapshot.
Open transaction management remains enabled on both the C and the D drives
for the entire duration of the backup. This mode is useful when it is necessary
to maintain the relationships between files on the different drives.
Use All Available Drives
Specifies that open transaction management be enabled on all drives,
regardless of which ones are being backed up. If you are backing up clients in
a class that is using Allow Multiple Data Streams, this setting ensures that all
the backups can use open transaction management.
For example, assume the following:
• A client has four drives: C, D, E, and F.
• The class file list contains directives that split the client backup into two
streams, each of which is an independent backup. Drives C and D are in one
backup and drives E and F are in the other backup.
• The server attempts to start both backups at the same time.
If Individual drive snapshots or Global drive snapshots are selected, the
following occurs:
1. The drive C and D backup starts.
2. NetBackup enables open transaction management for drives C and D.
3. The drive E and F backup starts. However, NetBackup cannot enable open
transaction management for drives E and F.
When open transaction management is active, another enable attempt
succeeds only if the set of drives are the same as the active set. In this
example, the sets are different.
4. The drive E and F backup continues, but without open transaction
management.
NetBackup 3.2 System Administrator's Guide for Windows NT
NetBackup 3.2 System Administrator's Guide for Windows NT
