Data Protector NDMP Integration Quickstart Guide

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Deduplication performance test results
As part of the validation of Data Protector managed protection of HP and NetApp NAS filers using a
HP StoreOnce Backup System as the backup storage, the backup data deduplication rates were
measured. The test data set was made up of unstructured file data from a production environment. A
backup scheme that simulated daily full backups was used. Between each backup, a random
selection of 5% of the data was changed.
The tests were run multiple times from an HP X9000 and a NetApp FAS3070 to investigate the effects
of varying the Data Protector block size and the NDMP blocking factor. The results are shown in
Figure 18.
Figure 18: Comparison of deduplication ratios using different tape block sizes and different NDMP blocking factors versus a
regular file system backup of the same data to an HP StoreOnce Backup System. The backup configuration was for full backups
with a random 5% of the data changed between each backup.
Licensing considerations
As shown in Table 1, the file system and NDMP-controlled methods of protecting the NAS filer require
different Data Protector licenses. Both require a Data Protector Cell Manager and either Advanced
Backup To Disk, or Drive and Slot licenses for the StoreOnce Backup System.
The difference is that an NDMP-controlled backup requires a Direct Backup Using NDMP license. The
licensing for this is calculated based on the configured capacity of the NAS filer. The result is that the
NDMP-based method will have higher Data Protector licensing costs.
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Deduplication Ratio (x:1)
Backup (5% random data change between backups)
X9000 NDMP backup (Default values: 64kB block size, 128kB BLOCKING_FACTOR)
X9000 NDMP backup (256kB block size, 256kB BLOCKING_FACTOR)
Standard File System backup (1MB block size)
FAS 3070 NDMP backup (Default values: 64kB block size, 63kB MOVER_RECORD_SIZE)
FAS 3070 NDMP backup (256kB block size, 256kB MOVER_RECORD_SIZE)