John you are absolutely correct!  I have no benchmark data but I don't think 
you really need it to argue that a restore of a single contiguous stream will 
be faster than that of its peer that has been Multiplexed with 8 other jobs.  

However, I believe that is something that needs to be decided at the Business 
level with regards to each individual site's SLA they have with their customers 
(user community).

David


Quoting John Meyers <john.meyers AT wright DOT edu>:

> 
>  Regarding performance issues with multiplexing, I would think that the
>  higher the number of streams multiplexed to a tape, the slower your 
>  restore times would be due to the extra tape positioning required.
> 
>  I was just wondering if anyone had any data in this area regarding
>  performance metrics associated with multiplexing multiple streams to
>  tape?
> 
>  Thanks,
> 
>  John
> 
> --
>  John Meyers
>  Computing Services
>  Wright State University
>  E-mail: john.meyers AT wright DOT edu
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