Specifications

NetApp Deduplication for FAS and V-Series Deployment and Implementation Guide

7 DEDUPLICATION AND EXCHANGE

If Exchange and NetApp deduplication for FAS will be used together, the following should be taken into

consideration:

In some Exchange environments, extents are enabled to improve performance of database validation.

Enabling extents does not rearrange blocks on disk that are shared between files by deduplication on

deduplicated volumes. Since enabling extents does not predictably optimize sequential data block

layout when used on deduplicated volumes, there is no reason to enable extents on deduplicated

volumes.

For additional details regarding Exchange, refer to TR-3578, Microsoft Exchange Server 2007 Best

Practices Guide.

8 DEDUPLICATION AND TIVOLI STORAGE MANAGER (TSM)

If Tivoli Storage Manager (TSM) and NetApp deduplication for FAS will be used together, the following

should be taken into consideration:

Deduplication savings with TSM will not be optimal due to the fact that TSM does not block align data

when it writes files out to its volumes. The net result is that there are less duplicate blocks available to

deduplicate.

TSM compresses files backed up from clients to preserve bandwidth. Compressed data does not

usually yield good savings when deduplicated.

TSM client-based encryption will result in data with no duplicates. Encrypted data does not usually yield

good savings when deduplicated.

TSM’s progressive backup methodology backs up only new or changed files, which reduces the number

of duplicates, since there are not multiple full backups to consider.

9 DEDUPLICATION AND SYMANTEC BACKUP EXEC

If Symantec

™

Backup Exec

™

and NetApp deduplication for FAS will be used together, the following should

be taken into consideration:

Deduplication savings with Backup Exec will not be optimal due to the fact that Backup Exec does not

block align data when it writes files out to its volumes. The net result is that there are less duplicate

blocks available to deduplicate.

10 DEDUPLICATION AND LOTUS DOMINO

If Lotus Domino and NetApp deduplication for FAS will be used together, the following should be taken into

consideration:

There have been reports of degradation in read performance when deduplication is used with Lotus

Domino on primary storage. This is a note for caution at this time, while the cause behind this behavior

continues to be researched.