Managing pools and DP-VOLs

Parent Topic

• Configuring thin provisioning

  Thin provisioning technology allows you to allocate virtual storage capacity based on anticipated future capacity needs, using virtual volumes instead of physical disks. Thin provisioning is an optional provisioning strategy for your storage systems. Thin provisioning is implemented by creating one or more Dynamic Provisioning pools (DP pools) of physical storage space.

Child Topics

• Viewing pool information
• Viewing used pool capacity
• Viewing formatted pool capacity
• Viewing the progress of rebalancing the usage level among parity groups
• Increasing pool capacity
• Changing a pool name
• Enabling deduplication on an existing pool

  When you enable deduplication on a pool, the deduplication system data volume (DSD volume) for the pool is created. You must enable deduplication on a pool before you can enable deduplication on DP-VOLs assigned to the pool.

• Disabling deduplication on a pool

  Use this procedure to disable the deduplication function on a pool.

• Recovering a blocked pool
• Decrease pool capacity
• Deleting a tier in a pool
• Deleting a pool

  Use this procedure to delete a pool.

• Changing external LDEV tier rank
• Increasing DP-VOL capacity
• Changing the name of a DP-VOL
• About releasing pages in a DP-VOL

  Releasing pages in a DP-VOL frees up pool capacity. When a page in the DP-VOL contains zero data, the free capacity of a pool increases after the pages are released. You can reclaim zero pages on each V-VOL and then monitor the progress on the View Pool Management Status window. If you stop the reclaim zero pages operation, the zero pages that have already been reclaimed cannot be restored.

• Changing full allocation settings in DP-VOLs
• Enabling or disabling tier relocation of a DP-VOL
• Enabling capacity saving functions on DP-VOLs
• Disabling the capacity saving functions on DP-VOLs
• Deleting a DP-VOL

  Use this procedure to delete a DP-VOL.

• Deleting all capacity saving-enabled DP-VOLs in a pool

  When a deduplication system data volume is assigned to a pool, use this workflow to delete all of the capacity saving-enabled DP-VOLs in the pool. If the pool does not have a deduplication system data volume, you must use the delete DP-VOL procedure.