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.

Lenovo Storage V series 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 new storage pool.

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