Dell DR4000 - Manual (Page 26)

26 Setting up IBM TSM on the Dell™ DR4X00 Disk Backup Appliance
Appendix B
DR4X00 and TSM Best Practices / Considerations
Deduplication
DR4X00 has inline deduplication built in and does not require any additional deduplicaiton to be done
ahead of data being written to the DR4X00 device. The DR4X00 device will remove any redundancies in
the data before the data is stored on disk.
Enabling Deduplication before the data stream is sent to the DR4X00 device will cause the data to be
obfuscated not allowing the DR4X00 devices to achieve optimal dedupe savings. It is highly
recommended that deduplication is not done before the data stream is sent to the DR4X00.
Compression
DR4X00 has compression built in and does not require any additional compression to be done ahead of
data being written to the DR4X00 device. The DR4X00 device will remove any redundancies in the data
before being stored on disk.
Enabling Compression before the data stream is sent to the DR4X00 device will cause the data to be
obfuscated not allowing the DR4X00 devices to achieve optimal dedupe savings. It is highly
recommended that compression is not done before the data stream is sent to the DR4X00..
Encryption
Enabling Encryption before the data stream is sent to the DR4X00 device will cause the data to be
obfuscated not allowing the DR4X00 devices to achieve optimal dedupe savings. It is highly
recommended that encryption is not done before the data stream is sent to the DR4X00..
DR4X00 supports encryption on the wire for transferring data to remote sites using replication. In future
versions of the software it will support encryption on disk as well.
Space Reclamation
For optimal performance, DRX00 and TSM backup and space reclamations jobs should be scheduled to happen at
different times.