Funny, we set ours down to 25% as well just to see what would happen.  This 
worked but we have since set all of the ATA Pools to 50% and we just leave them 
there.  Theoredically what could happen is we could be wasting twice as much 
space but the fact is the volumes were going from 25% to 50% in a matter of 
days and when we looked at how many volumes were between 25% and 50% in our 
enviornment we determined there was no need to reclaim down that far.  From all 
outword signs there was no issues with reclaiming down to 25% we just didn't 
think it was worth doing the extra work to get back such a small amount of 
disk.  Disk is cheap, right! lol


"Rushforth, Tim" <TRushforth AT WINNIPEG DOT CA> wrote:
We've set ours at 25%. We are just piloting an all disk backup pool for
some clients on one of our servers and for small files on another.

-----Original Message-----
From: Steve Harris [mailto:Steve_Harris AT HEALTH.QLD.GOV DOT AU]
Sent: July 26, 2004 6:26 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: D2D vs. tape backups with TSM?

So, how high do you set your file class reclaim percentage? If its that
fast you should be able to cope with 20% free or less before reclaim.


Steve.


>>> tsm_user AT YAHOO DOT COM 27/07/2004 9:12:33 >>>
Dito and that is how we implemented large disk backup solutions on ATA disk.
We use File device classes. We have found that the reclaim extremely fast,
much faster than tape.


"Rushforth, Tim" wrote:
You can run reclamation with D2D by using Devicetype=file on disk.

-----Original Message-----
From: Jesse Dotterer [mailto:jdotterer AT SEPATON DOT COM]
Sent: July 23, 2004 10:54 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: D2D vs. tape backups with TSM?

There are some other faster restore solutions out there. With Virtual
Tape Libraries you get all the speed and reliability of D2D but with all
the functionality of tape. For example, I happen to work for a company
that provides a VTL solution which is certified by IBM-TSM. There is no
way to run reclamation on D2D so that must be done once it is
transferred to real tape. With a VTL solution, you backup to a virtual
tape library and device, run the reclamation on that, which is nearly
instantaneous and then copy to real tape via archive and that saves you
hrs and hrs of reclamation time. The other benefit is the near
unlimited amount of mount points. With backups and restores, the speed
of real tape and libraries are not longer your bottleneck.


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