Dell POWEREDGE R710 - Manual (Page 18)

Dell HPC Tiered Storage Solution
Page 16
ML6000 LTO5 Scalability
Optimizing and best practices
CommVault Simpana 9 Software has many options and parameters that can be tuned to improve
performance for a particular implementation.
(5) This section reviews a few of those options and
parameters. This is not meant to be a complete list but rather a general guide or introduction to areas
that can you can research for possible performance improvements.
Improving throughput to storage media
The throughput to a storage medium depends on the speed at which chunks are written to that medium
and the number of entries per chunk in the Index Cache. You can increase the CHUNKSIZE to improve
the throughput to the storage medium. However, the disadvantage is that granular restores (for
example, single file restore) are slower. On the other hand, large restores, like a full machine rebuild
are generally faster.
By default, the chunk size is configured to get the optimal throughput to the storage medium. Dell
recommends that you modify the chunk size when performing data movement to tape. You cannot
improve the performance of data movement to a disk by modifying the chunk size.
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Number of LTO5 drives
Scale from 1 data stream with 1 drive to 6 data streams with 6 drives
Native (no compression)
Compressed 2:1 ratio