On Fri, 21 Mar 2008 10:25:01 -0500, Rugen, Len <[EMAIL PROTECTED]> 
wrote:

>We have View Direct / Mobius report viewer.  It has 100,000's of HSM
>migrated files in our 3494 library.  If they just issue recalls for
>these in some order they choose, the physical tape and file order will
>be random and slow.  On a good day, 500 recalls would probably be the
>max we could allow before we would need the drives for overnight
>production.  I think when I did the math, it was 3-4 years worth of
>recalls.  (That's OK, I need this job :-) )
>
Not that this is similar but I had to delete about 500K+ old datasets from a 
HSM system back when and could generate the delete records to do it. 
Submitting them within TSO in batch was a pain to do in chucks of a few 
hundred. I have a TSO DELAY command (on CBT tape or available if you need 
it offlist). I just inserted the "DELAY 1" (delay for 1 second) command in the 
stream after a number of delete commands and let it rip. It would run for 8-12 
hours at a crack for the number I wanted. Indeed getting the recalls coming 
from the same tape all together is a stellar idea. 

jim   

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