Modifying the VxVM or FlashSnap resync options for point in time rollback
Several options can be set for Instant Recovery point in time rollback when multiple volumes are involved in the rollback. For better performance, you can modify these options to suit the circumstances of the rollback.
The following options can be modified for rollback of a VxVM or FlashSnap snapshot:
Maximum number of volumes to resynchronize concurrently
Sync region size in MB (UNIX only)
Sync I/O delay in milliseconds (UNIX only)
By default, these resync options have the same values for restore as they had for the backup. For the defaults, see the following section:
See Configuration parameters for Snapshot Manager.
To modify the VxVM or FlashSnap resync options for point in time rollback
- Create the following file:
/usr/openv/netbackup/SYNC_PARAMS
- In the file, enter the numeric values for the options, on one line. The numbers apply to the options in the bulleted list above, in that order.
For example:
6 3 1000
This example resets the options as follows:
Maximum number of volumes to resynchronize concurrently = 6
Sync region size in MB (UNIX only) = 3
Sync I/O delay in milliseconds (UNIX only) = 1000