I think you may have misunderstood multiplexing and streaming.
Multiplexing as far as i understand it means you can write multiple jobs
from a schedule to the same storage unit assuming mpx values are set
correctly per drive etc. Multi streaming is creating a separate job for
different volumes on an individual server within that policy. You then
need to have the correct amount of jobs per client set and allow
multiple data streams on the policy.
This can be used for eg to backup / and /opt/openv if they are on
separate disks. There can be issues with disk thrashing if you have new
streams on unix servers from the same disk.
I think you only really need deal with multiplexing here.
Hope that helps
Dave
WEAVER, Simon wrote:
>Oh yes sorry that is set - configured ti allow data streams
>
>Simon Weaver
>Technical Support
>Windows Domain Administrator
>
>EADS Astrium
>Tel: 02392-708598
>
>Email: Simon.Weaver AT Astrium.eads DOT net
>
>
>
>-----Original Message-----
>From: Jérôme Meyer [mailto:jerome.meyer AT pax DOT ch]
>Sent: 02 November 2005 12:52
>To: WEAVER, Simon
>Cc: veritas-bu AT mailman.eng.auburn DOT edu
>Subject: Antw: [Veritas-bu] Multiplexing / Streaming
>
>
>Hi Simon
>
>It's seems right but you should still to enable in Attribute's policy
>-> "Allow multiple data streams"
>
>Regards,
>Jerome
>
>
>
>>>>"WEAVER, Simon" <simon.weaver AT astrium.eads DOT net> 02.11.2005 12:37:02
>>>>
>>>>
>>>>
>
>Hi can I have some opinions please?
>I am deeply concerned about backup speeds, and trying to get my head around
>streaming and multiplexing.
>
>I have 3 available tape drives and I have 2 policies that I intend to run
>tonight. I want both policies to use the available drives where possible.
>
>I have told NBU I have 5 drives available - 2 are offline at the moment, but
>3 are readily there.
>
>The 1st policy will start at 6pm and contains 3 streams
>
>The 2nd Policy starts at 7pm and contains 3 streams.
>
>Both of the policies both state "Media Multiplexing" is set for 3
>
>NBU Master Storage Unit is set for "Max Multiplexing per drive" is 6.
>
>Does this sound right or have I missed the point?
>
>Thank you for any input!
>
>Simon
>
>
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