ADSM-L

Re: Fragmentation problems with large disk only stogare pool?

2005-02-14 10:50:32
Subject: Re: Fragmentation problems with large disk only stogare pool?
From: Steve Bennett <steve_bennett AT ADMIN.STATE.AK DOT US>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 14 Feb 2005 06:53:02 -0900
Eric and Jean,

I'm not sure that is true. I did some limited testing in a win2000 sp4
tsm 5.2.3.2 and IIRC it appeared that the preallocated files did get
reallocated at the os level the first time they received data and I
would assume when they were reclaimed and reused. We just started using
a 6.4 gb sata and are not using the preallocated files at this time.

Can anyone else validate what I think I saw vs what Eric saw?

Loon, E.J. van - SPLXM wrote:
Hi Jean!
We are currently designing a new TSM environment with a disk-only
implementation.
Because of the risk of fragmentation, we decided to use pre-allocated file
volumes. This prevents fragmentation, because the volumes are propperly
reclaimed while the actual OS file is not physically relocated.
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines


-----Original Message-----
From: William Jean [mailto:wjean AT GLASSHOUSE DOT COM]
Sent: Monday, February 14, 2005 14:55
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Fragmentation problems with large disk only stogare pool?




Has anyone who is using a large disk only primary storage pool run into any
problems with fragmentation?


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--

Steve Bennett, (907) 465-5783
State of Alaska, Enterprise Technology Services, Technical Services Section

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