Use these techniques to efficiently manage TSM storage pools health and utilization


In Tivoli Storage Manager (TSM) backed-up and archived files are stored in groups of volumes that are called storage pools. Because each storage pool is assigned to a device class, you can logically group your storage devices to meet your storage-management needs.

TSM Storage Pool Management Techniques


Collocation
The server can keep each client's files on a minimal number of volumes within a storage pool. Because client files are consolidated, restoring collocated files requires fewer media mounts. However, backing up files from different clients requires more mounts.

Reclamation
Files on sequential access volumes may expire, move, or be deleted. The reclamation process consolidates the active, unexpired data on many volumes onto fewer volumes. The original volumes can then be reused for new data, making more efficient use of media.

Also Read: Difference between Server-side and Client-side Deduplication

Backing Up Storage pool
Client backup, archive, and space-managed data in primary storage pools can be backed up to copy storage pools for disaster recovery purposes. As client data is written to the primary storage pools, it can also be simultaneously written to copy storage pools.

Copying Active Data
The active versions of client backup data can be copied to active-data pools. Active-data pools provide a number of benefits. For example, if the device type associated with an active-data pool is sequential-access disk (FILE), you can eliminate the need for disk staging pools. Restoring client data is faster because FILE volumes are not physically mounted, and the server does not need to position past inactive files that do not need to be restored. An active-data pool that uses removable media, such as tape or optical, lets you reduce the number of volumes for onsite and offsite storage.  If you vault data electronically to a remote location, a SERVER-type active-data pool lets you save bandwidth by copying and restoring only active data.As backup client data is written to primary storage pools, the active versions can be simultaneously written to active-data pools.

Also Read: TSM Storage Pool Concepts (V7 Revised)

Caching
When the server migrates files from disk storage pools, duplicate copies of the files can remain in cache (disk storage) for faster retrieval. Cached files are deleted only when space is needed. However, client backup operations that use the disk storage pool may have poorer performance.

StoragePool Hierarchy
You can establish a hierarchy of storage pools. The hierarchy can be based on the speed or the cost of the devices associated with the pools. Tivoli Storage Manager migrates client files through this hierarchy to ensure the most efficient use of a server's storage devices.
You manage storage volumes by defining, updating, and deleting volumes, and by monitoring the use of server storage. You can also move files within and across storage pools to optimize the use of server storage.




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