Planning for deduplicated volumes

A deduplicated volume or volume copy can be created in a data reduction pool. When you implement deduplication, you must consider specific requirements in the storage environment.

Deduplication is a type of compression that eliminates duplicate copies of data. Deduplication of user data occurs within a storage pool and only between volumes or volume copies that are marked as deduplicated. However, there is no requirement for all nodes in a system, and therefore all I/O groups, to support deduplication. You can create deduplicated volumes in an I/O group when no compressed volumes or volume copies are in regular storage pools (that is, when real-time compression is in use on that I/O group).

You can migrate any type of volume from a regular storage pool to a data reduction pool. You can also migrate any existing real-time compressed volume to a data reduction pool. After you migrate a volume to a data reduction pool, you can then create a deduplicated volume.

The following software and hardware requirements are needed for deduplication. There are also update and performance considerations.
Real-time compression and deduplication are not supported in the same I/O group. However, data reduction compression and deduplication might be supported on certain platforms. Table 1 details the features that are supported on each platform.
Table 1. Supported compression features.

The table describes the types of compression features that are supported on each model.

Product Platform Node/canister memory (GBs) Supported features
Real-time compression DRP Compression Deduplication
9846-AF8 and 9848-AF8
Lenovo Storage V series V5030 (32 GB) 32 Yes1 Yes Yes1 Yes
V5030 (16 GB) 16 No Yes No No
V3700 XP 8/16 No Yes No No
V3700 8 No Yes No No