Hi Paul

It would be helpful to know what kind of the tape technology you're using since 
the reclamation threshold % is usually based off which technology is being 
used. Smaller tapes can usually have a small threshold while larger tapes 
requires a larger threshold. 

One way to reduce the amount of tapes is simply to reduce the threshold to 
something like 30 and let the reclaim process run until it's complete. This 
will require enough free tape drives to a) let reclamation run until it's 
complete b) do normal operations.

There can be several reasons why you get so high pct reclaim. One is that 
you're running full database or application backups. Since this will expire a 
full backup every day, it will cause the reclaim on your tapes to rise. 
Splitting your copypool into separate ones categorized on the type of data 
stored (one for fileservers, one for application servers for example) is one 
way to go, using collocation is another.

Best Regards

Daniel Sparrman

-----"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> skrev: -----


Till: ADSM-L AT VM.MARIST DOT EDU
Från: Paul_Dudley <pdudley AT ANL.COM DOT AU>
Sänt av: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
Datum: 04/08/2011 06:07
Ärende: Copypool storage advice

I currently have a lot of copypool storage tapes which are between 50 - 60% 
utilization. Expiration runs daily and I run reclaimation daily on this 
copypool, set to 50.

Is there anything I can do to try and consolidate the data onto fewer copypool 
tapes?



Thanks & Regards

Paul



Paul Dudley

Senior IT Systems Administrator

ANL Container Line Pty Limited

Email:  <mailto:pdudley AT anl.com DOT au> pdudley AT anl.com DOT au







    
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