Veritas NetBackup™ Appliance Capacity Planning and Performance Tuning Guide
- About this Guide
- Section I. Capacity planning
- Analyzing your backup requirements
- Designing your backup system
- Section II. Best Practices
- Section III. Performance tuning
- Section IV. Quick reference to Capacity planning and Performance tuning
About moving a storage partition for better performance
This section describes how to move a storage partition from a base unit to an expansion disk.
If all or a part of your MSDP partition resides on the appliance base unit (base disk), it is recommended that you move the MSDP partition to an external storage shelf (expansion disk). This applies to 5230 and 5240 appliances and is needed for optimum performance. The base unit should ideally be used in case the external storage is full and you have yet to add additional storage shelves. For a 5250 appliance with attached external storage shelves, there is no requirement to exclude the appliance base unit (base disk) from the MSDP storage pool.
If high performance of the MSDP catalog is required, the MSDP storage pool should not include the appliance base unit (base disk) when external storage shelves are attached.
While moving a storage partition from a base unit to an expansion disk the following guidelines should be considered:
To schedule high performance backups, it is recommended to move the AdvancedDisk partition or MSDP partition from the base unit to the expansion disk. For example, moving the MSDP partition would result in the backup to MSDP to span across 450MB/s and 850MB/s storage which leads to performance improvements.
The approximate time required to move 4TB from a base unit to an expansion disk is ~2.45hours on a light load system. This can be considered as the basis to calculate the time for moving additional TB of data.
The amount of data being backed up should be limited when moving a storage partition. If the backup is not limited the time required to move a partition can increase and be double the actual time required. The best practice is to limit the backup coming in during the move, if this precaution is not taken the time to move 4TB the move can increase up to 5 hours
You can move a storage partition using the following options:
Using the Manage > Storage > Partitions from the NetBackup Appliance Web Console, See Moving a partition.
Using the Manage > Storage > Move command from the NetBackup Appliance Shell Menu, See Moving a partition using the NetBackup Appliance Shell Menu.