ADSM-L

Re: Minor gotcha on upgrade to 5.3

2005-03-16 13:53:46
Subject: Re: Minor gotcha on upgrade to 5.3
From: Jurjen Oskam <jurjen AT STUPENDOUS DOT ORG>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 16 Mar 2005 19:53:05 +0100
On Wed, Mar 16, 2005 at 03:21:23PM +0100, Remco Post wrote:

> >to be aware of. In TSM 5.3, the handling of FILE volumes was changed.
> >All writes to such a volume is now done in blocks of 256 KiB minimum,
> >even when the object itself is much smaller.

> and IBM sells this as WAD? Does this also affect tape storage (not likely).

I quote from the PMR:

   "The over head should affect sequential access volumes in general,
   however there are other factors that can come in to play on a physical
   tape devices that would not affect a file devclass.   These other
   factor can include volume capacity,  hardware compression and the
   block or header sizes dictated by the actual device.    Because of
   these conditions, the waste seen on a FILE volume may not have the
   same impact or even noticeable on tape volumes."

So your mileage may vary, I guess...

--
Jurjen Oskam

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