Easy Tier® evaluation mode

When Easy Tier® evaluation mode is enabled for a storage pool with a single tier of storage, Easy Tier® collects usage statistics for all the volumes in the pool.

The system monitors the storage use at the volume extent level. Easy Tier® constantly gathers and analyzes monitoring statistics to derive moving averages for the past 24 hours.

Volumes are not monitored when the easytier attribute of a storage pool is set to off. Volumes are monitored when the easytier attribute of a storage pool is set to measure.

You can control or view data placement settings by using the following command-line interface (CLI) commands:

chmdiskgrp
Modifies the properties of the storage pool. Use this command to turn on evaluation mode on a storage pool with a single tier of storage and to turn off Easy Tier functions on a storage pool with more than one tier of storage.
lsmdiskgrp
Lists storage pool information.
lsvdisk
Lists volume information.
lsvdiskcopy
Lists volume copy information.
mkmdiskgrp
Creates a storage pool.

Other MDisk commands such as addmdisk, chmdisk, and lsmdisk can be used to view or set the tier an MDisk belongs to.