ADSM-L

Re: [ADSM-L] Deduplication "number of chunks waiting in queue" continues to rise?

2013-12-20 14:33:38
Subject: Re: [ADSM-L] Deduplication "number of chunks waiting in queue" continues to rise?
From: Erwann Simon <erwann.simon AT FREE DOT FR>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Fri, 20 Dec 2013 20:31:00 +0100
Hi All,

Is someone using this script for reporting purpose ?

http://www-01.ibm.com/support/docview.wss?uid=swg21596944

-- 
Best regards / Cordialement / مع تحياتي
Erwann SIMON

----- Mail original -----
De: "Wanda Prather" <Wanda.Prather AT ICFI DOT COM>
À: ADSM-L AT VM.MARIST DOT EDU
Envoyé: Vendredi 20 Décembre 2013 05:35:38
Objet: [ADSM-L] Deduplication  "number of chunks waiting in queue" continues to 
rise?

TSM 6.3.4.00 on Win2K8
Perhaps some of you that have dealt with the dedup "chunking" problem can 
enlighten me.
TSM/VE backs up to a dedup file pool, about 4 TB of changed blocks per day

I currently have more than 2 TB (yep, terabytes)  of volumes in that file pool 
that will not reclaim.
We were told by support that when you do:

SHOW DEDUPDELETEINFO
That the "number of chunks waiting in queue" has to go to zero for those 
volumes to reclaim.

(I know that there is a fix at 6.3.4.200 to improve the chunking process, but 
that has been APARed, and waiting on 6.3.4.300.)

I have shut down IDENTIFY DUPLICATES and reclamation for this pool.
There are no clients writing into the pool, we have redirected backups to a 
non-dedup pool for now to try and get this cleared up.
There is no client-side dedup here, only server side.
I've also set deduprequiresbackup to NO for now, although I hate doing that, to 
make sure that doesn't' interfere with the reclaim process.

But SHOW DEDUPDELETEINFO shows that the "number of chunks waiting in queue" is 
*still* increasing.
So, WHAT is putting stuff on that dedup delete queue?
And how do I ever gain ground?

W



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