UNCLASSIFIED
I've been reading
the various Symantec guides (admin guides, performance tuning guides) in regards
to tuning NBU performance and would like to clarify a few things. I'm trying to
get my throughput up to an appropriate speed to avoid shoe shining and also cut
down my backup windows. We have 2 LTO3 drives (with LTO3 tapes,
obviously).
There are 2
specific objectives I'm trying to achieve:
- send multiple jobs
from a single policy to a single drive concurrently. I'm thinking 3 concurrent
jobs should be fine initially. Once one of the clients finishes, another is
added to the job.
- send multiple
streams (e.g. 3 streams) from a SAN client to a single drive. Once one stream
finishes, another is added to the job.
I've already got the
Global Attribute of 'number of jobs per client' at 99 (I think it was set like
this for MS-SQL backups) so this doesn't need to be configured. 'Maximum
concurrent write drives' is set to 2 for storage units.
For the first
objective, I think I need to change a few settings; 'Maximum streams per drive'
on appropriate storage units (set to 3), 'Media multiplexing' (set to 3) on
schedule in policy. Does this sound about right? Do I need to worry about 'Limit
jobs per policy' setting?
The second objective
is a bit more confusing. Is it simply a case of setting the same settings as the
first objective (but on appropriate storage unit and policy), setting the
streams in the backup selection tab on the policy and the 'Allow multiple data
streams' setting on the policy.
I know to get the
most out of this I'll need to tweak a few things to get ideal numbers for the
settings but just trying to understand exactly which setting I need to configure
for the things I'm trying to do.
Cheers,
---------------------------------------------------------------------
Tim Wilkinson
I.T. Support Officer
Science
Corporate Information Systems
Defence Science
& Technology Organisation
Department of
Defence
Tel: (02) 93810065
Fax: (02) 93810011
Email: tim.wilkinson AT dsto.defence.gov DOT au
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