ADSM-L

Re: Migration Speed Has Plummeted

2005-08-17 09:43:16
Subject: Re: Migration Speed Has Plummeted
From: Joni Moyer <joni.moyer AT HIGHMARK DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 17 Aug 2005 08:19:12 -0400
Hello Everyone!

How do you know if caching is turned on?  How/where can you turn it off?  I
am having lousy migration speed perfomance as well.  What can I look
at/change?  I have an AIX 5.2 server at TSM 5.2.4.0 with LTO2 tape drives
attached.  Thanks!

********************************
Joni Moyer
Highmark
Storage Systems
Work:(717)302-6603
Fax:(717)302-5974
joni.moyer AT highmark DOT com
********************************



             "David E
             Ehresman"
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             08/17/2005 08:09
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>We back up around  220 Gb of data to the disk pool overnight, then migrate
>(with caching on) to cartridge in the morning.
>

I assume you mean TSM storage pool caching rather than 3390 caching.  If
so, I'd turn off caching for a day and see if that makes a difference.  It
is my understanding that TSM caching, while optimizing restore times, can
cause performance problems in other TSM areas.

David