How to conclude Data Deduplication on TSM v6.2 was successful or not

[DanGiles]

Ummm, the Identify Duplicates is for storage pool FRCO, but your query is for FLPR ...?

Also, set reclamation to 100%, so you're not doing backups, deduplication, AND reclamation at the same time!

 

[rpark]

Yeh... I know. I just ran a q pr and scraped the last 4 processes off to copy. I'm running reclaimation, it looks as if it's deduping... but based on the query, I'm not recouping any space wien reclaimation runs.. which is really the issue.

 

[DanGiles]

To getting better idea of the amount recouped during dedup/reclamation, I'd run the following querie

1. before the backups run
2. after the backups complete
3. after "identify duplicates" processes finish and reclamation runs

That will tell you the relative change in the number of volumes you are dealing with.

select count(*) from volumes where stgpool_name='pool_name'

2.-1. = additional volumes from night's backup
3.-2. = deduplicated additional volumes from night's backup

e.g. 2.-1.=50 volumes
3.-2.=40 volumes
Actual space saved roughly (50-40)/50*100=20%