I am trying to test de-duplication in TSM 6.1.
I have realized next things:
1) de-duplication is applicable to storage pool;
2) reclaim process for de-duplication is working on volume level (threshold is 
for volume, not for storage pool).
In my opinion, this difference can create quite serious problem. For example:
-         storage pool with de-duplication has volume size 2G;
-         there is a file system with size approximately 2G;
-         selective backup has been done 4 times and 4 volumes have been 
utilized approximately 100%;
-         logical storage pool utilization is approximately 25% (there are 4 
copies of each file);
-         reclaimable space in each volume is approximately 0.
How we can reclaim 75% of storage pool? Use very small threshold (for example, 
1)?
Maybe I am wrong at all and there is no problem?


Grigori G. Solonovitch

Senior Technical Architect

Information Technology  Bank of Kuwait and Middle East  http://www.bkme.com

Phone: (+965) 2231-2274  Mobile: (+965) 99798073  E-Mail: G.Solonovitch AT bkme 
DOT com<mailto:G.Solonovitch AT bkme DOT com>

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