Dell PowerVault ME5 Series Storage System CLI Reference Guide

Sets parameters for a virtual pool.

Each virtual pool has three thresholds for page allocation as a percentage of pool capacity. You can set the low and middle thresholds. The high threshold is automatically calculated based on the available capacity of the pool minus 200 GB of reserved space.

When the low or middle threshold is exceeded, event 462 is logged with Informational severity. If the high threshold is exceeded and the pool is not overcommitted, event 462 is logged with Informational severity. If the high threshold is exceeded and the pool is overcommitted, event 462 is logged with Warning severity. If the pool capacity threshold is reached, event 462 is logged with Error severity. When pool usage falls back below any threshold, event 463 is logged with Informational severity.

You can also enable the overcommit feature, which controls whether storage-pool capacity may exceed the physical capacity of disks in the system. If you try to disable overcommit and the total space allocated to thin-provisioned volumes exceeds the physical capacity of their pool, an error will state that there is insufficient free disk space to complete the operation and overcommit will remain enabled.

set pool

[low-threshold <#>%]

[middle-threshold <#>%]

[overcommit enabled|disabled|on|off]

pool

Optional. Sets the low threshold for page allocation as a percentage of pool capacity. This value must be less than the middle-threshold value and must be a whole number.. The default low-threshold value is 50%.

Optional. Sets the middle threshold for page allocation as a percentage of pool capacity. This value must be between the low-threshold value and the high-threshold value and must be a whole number. The default middle-threshold value is 75%.

• enabled or on: The pool will use thin provisioning, which means that more capacity can be allocated to volumes than physically exists in the pool. When stored data approaches the limit of physical capacity, the administrator can add more enclosures to the system. This is the default.
• disabled or off: The pool will use full provisioning, which means that the capacity allocated to volumes when they are created cannot exceed the physical capacity of the pool.
  NOTE:If you try to disable overcommit and the total space allocated to thin-provisioned volumes exceeds the physical capacity of their pool, an error will say that there is insufficient free disk space to complete the operation and overcommit will remain enabled.

The name of the storage pool for which to change settings.

# set pool low-threshold 30% A

# set pool overcommit off B

delete pools

show pools