ADSM-L

Re: ADSM/Backint parallel backups on an SP

1997-04-01 11:34:28
Subject: Re: ADSM/Backint parallel backups on an SP
From: Ian Northeast <i.northeast AT POCLK.DEMON.CO DOT UK>
Date: Tue, 1 Apr 1997 17:34:28 +0100
In message <9703312039.AA11119 AT alssun.adc DOT com>, Jim Bootz
<bootz AT ADC DOT COM> writes
>Recently, we attempted for the first time to do parallel backups to three 3590
>tape drives in a 3494 robotic library across an SP switch and failed with
>numerous "TCP/IP connection" failures. Similar parallel backups across ethernet
>worked fine, but were much slower than a switch. We also had success using just
>two drives and the SP switch. Has anyone else had this experience? Is this a
>matter of tuning (our 'no' settings are considered optimal according to the
>latest information on SP tuning)? Or, are we expecting too much?
>

We have seen similar problems (using 4 3590 drives) but only since we
upgraded the server from 2.1.0.0 to 2.1.0.9. We get "authorisation
failure" rather than TCP/IP connection failures. We have this open with
IBM as a bug but it is not progressing as fast as I would like.

It would be useful if you could post your "no" settings and server and
client releases.

And no, I do not think you are expecting too much. How else would you
back up an SP?

>Jim Bootz
>bootz AT adc DOT com
>
>
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Ian Northeast                 Tel +44 171 441 1232
Ian Northeast                 Tel +44 171 441 1232
P&O Nedlloyd Ltd
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