Thin Image licensed capacity requirements

Thin Image User Guide

Version

9.8.6

Audience

anonymous

Part Number

MK-98RD9020-16

Thin Image requires licensed capacity for the Thin Image P-VOLs and pools.

Thin Image uses a portion of the Dynamic Provisioning licensed capacity for its pool capacity. Make sure you have enough Dynamic Provisioning licensed capacity to run both HDP and Thin Image. Use the maintenance utility to ensure that the license key for the Dynamic Provisioning program product is installed.

There are some licensing differences when using separate HDP and Thin Image pools compared to using a single, mixed pool. In the following examples, the total capacity is 20 TB and an estimated 3 TB is needed for Thin Image data.

In the case of separate pools of 17 TB for the HDP pool and 3 TB for the Thin Image pool, the license capacities are as follows:

HDP licensed capacity: 17 TB + 3 TB = 20 TB
Thin Image license capacity: 3 TB + Total P-VOL capacity (see note)

In the case of a mixed 20 TB pool, the license capacities are as follows:

HDP licensed capacity: 20 TB
Thin Image license capacity: 20 TB + Total P-VOL capacity (see note)

Note:

For thin provisioned volumes the occupied pool space is used for this calculation.
For compressed P-VOLs the original size is used in this calculation, not the compressed size.
Where multiple Thin Image snapshots are created from a single P-VOL, the capacity is only counted once for licensing.

The following table shows the Thin Image volumes and capacity calculated as the Thin Image usage. The total amount of these values must not exceed the Thin Image licensed capacity.

Intended volumes		Intended capacity
Software application	Volume type	Intended capacity
HTI	P-VOL: Logical volume (LDEV)	The volume capacity
	P-VOL: DP-VOL	The pool capacity used by the volume¹
	Pool-VOL: Logical volume (LDEV)	Thin Image pool: volume capacity DP pool: volume capacity²
Notes: For the volume with capacity saving enabled, HTI licensed capacity is the data capacity before saving. Not including the volumes of pools which are not in use by Thin Image pairs.

If the available licensed capacity is exceeded, regardless of whether a logical volume (LDEV) or a DP-VOL is used, the following restrictions apply to the pair operations:

The pair with the available licensed capacity exceeded cannot be created.
Pair creation cannot be performed.
Thirty days after the licensed capacity is exceeded, pair creation, pair split, and pair resync operations cannot be performed.

For more information about licenses, see the System Administrator Guide for your storage system.