ADSM-L

Re: Performance again!!!

2002-05-16 08:10:43
Subject: Re: Performance again!!!
From: Sandra Ghaoui <sandra_ghaoui AT YAHOO DOT COM>
Date: Thu, 16 May 2002 05:10:58 -0700
Hello,

we didn't try that one ...
Is there any reason for the migration from disk to
tape to be faster than backup from disk to tape?

thx
Sandra

--- Zlatko Krastev <acit AT ATTGLOBAL DOT NET> wrote:
> How long does the migration to tape take after
> How long does the migration to tape take after
> backup to disk?
>
> Zlatko Krastev
> IT Consultant
>
>
>
>
> Please respond to "ADSM: Dist Stor Manager"
> <ADSM-L AT VM.MARIST DOT EDU>
> Sent by:        "ADSM: Dist Stor Manager"
> <ADSM-L AT VM.MARIST DOT EDU>
> To:     ADSM-L AT VM.MARIST DOT EDU
> cc:
>
> Subject:        Performance again!!!
>
> Hello everybody,
>
> It seems like TSM performance problems will neer
> end!!!
>
> Here is the new problem:
>
> The customer is running TSM 4.2.1.0 on a Windows
> 2000
> server machine . An IBM rack case 82XX  which
> contains
> a Quantum DLT8000 tape drive is connected to the
> server.
> The driver version for the Quantum DLT drive is 1.5
> and
> is installed on the W2K machine. We tried a backup
> of
> 350MB on the local server with the Windows 2000
> Backup
>
> utility and it took us approximately 75 seconds .
>
> Next , we tried the same Backup from TSM using its
> Device Driver and it took us about 9 minutes . We
> tried switching TSM to use the Native device driver
> but still we got the same performance result .
>
> So we upgraded to 4.2.2 ; In the Device Manager for
> TSM,we can see that TSMSCSI.exe is upgraded to
> 4.2.2.25 and the ADSMSCSI.sys is 4.2.2.3 .  The
> server
> has a version of 4.2.2.25 .  Still , we obtained
> poor
> backup performance .
>
> We suspected that maybe it was a database bottleneck
> ( eventhough it is still empty) ; so we tried the
> same
> Backup using TSM but the destination was on the
> HardDisk.
> The performance was good and the backup finished
> within 75seconds .  So, we can eliminate the
> database
> problem.
> Also, we noticed with version 4.2.2.0 that it is
> crashing frequently . It was exiting abnormally .
>
> On the site of tivoli, the latest version of TSM
> server is 4.2.2 . We do not have the 5.1 release .
>
> does anyone have a suggestion?
>
> thx a lot
> Sandra
>
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