ADSM-L

Re: Move Data performance on co-located storage pools

1999-04-24 14:52:50
Subject: Re: Move Data performance on co-located storage pools
From: Mark Adams <mark_adams AT CSGSYSTEMS DOT COM>
Date: Sat, 24 Apr 1999 13:52:50 -0500
Think about it if the tape is not in the library it does not have to
mount, nor read the tape. The reclaim will obiously go faster than a
the tape that is in the library.


> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Doug Thorneycroft
> Sent: Friday, March 26, 1999 9:44 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Move Data performance on co-located storage pools
>
>
> Hello:
> I've notice that when I move data or reclaim data for my offsite
> storage pools, My processing rate is about 60% faster than when
> moving data on a primary co-located volume.
>
> My co-located volumes only have data from a single node, so only
> requires one input tape mount and one output tape mount.
>
> My copy pool processing normally requires about 15 to 20 input
> tape mounts and one output tape. (And mounts are slow on our library)
>
> Does anyone know why processing is so much slower on a co-located
> volume?
>
> WindowsNT Ver 3.1.2.13, but noticed the same performance before
> upgrading
> from Ver. 3.1.1.2
>
>
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