I believe this will happen -
Your first job will kick off at 6PM with 3 streams. All these streams will go to one tape drive, because you have the MPX value on the schedule set at 3.
The second policy will start at 7PM and generate another 3 streams. All these streams will go to a second tape drive, for the same reason.
With the schedule's MPX setting at 3, you will never get more than 3 streams going to the drive that that schedule is backing up to, regardless of what MPX setting you have on the storage unit.
I always set the MPX value on the schedule to the maximum (32 if I recall correctly) and manage the number of streams at the storage unit level.
We could could give more specific real-world advice if we knew exactly what you are trying to do. Are the clients IP connected, or are they media servers? If IP, what network speed? What kind of tape drives? Do you want to be able to spread the I/O out across all 5 tape drives?
Cheers
Dean
On 11/2/05, WEAVER, Simon <[EMAIL PROTECTED]> wrote:
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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