Data Protector NDMP Integration Quickstart Guide

Conclusions

 The main benefits of NDMP direct backups are delivered when:

– There is a need to minimize the backup load on the data network, application servers and

backup media servers.

– The filer is required to be backed up as a complete entity, although you can exclude files using

exclude commands in the NDMP environmental variables set in the NDMP backup job.

 The benefits of NDMP direct backups should be traded off against the fact that NDMP backup s can

be more expensive to implement (require additional licensing, such as an HP Data Protector Direct

NDMP backup license), and more complex to manage and configure compared to regular file

system backups.

 Backing up to an HP StoreOnce Backup System enables a deduplication ratio of between 12:1 and

16:1 over a period of 20+ backups with a simulated typical daily change rate of 5%. This provides

an approximately 90% + increase in backup storage use compared with backing up the same data

to a physical tape device or non-deduplicating disk.

 NDMP direct backups achieve similar deduplication ratios to file system backups using the largest

Data Protector block size. (NDMP backups achieve higher deduplication ratios than file system

backups using smaller Data Protector block sizes).

 The NDMP direct backup testing was conducted with various Data Protector tape block sizes along

with HP X9000 NDMP BLOCKING_FACTORs and NetApp FAS3070 NDMP MOVER_RECORD

_SIZEs. The results show that changing the tape block size and NDMP blocking factor had no

appreciable effect on the backup data deduplication ratio. The recommendation is to use the

default values in both Data Protector and the NAS filer.

 Testing showed that the HP X9000 implementation of NDMP backup delivers an approximately

10% + better backup data deduplication ratio compared with the NetApp FAS3070.