[Veritas-bu] Performance: Single server, multiple jukeboxes?
2004-02-12 11:48:19
To answer your last question. You can associate a policy/class with a
robot. You do it by creating storage units specific to each robot (a
requirement - STU's can not span robots) then assigning classes (or even a
schedule) with a specific storage unit.
-M
-----Original Message-----
From: Adam Porter [mailto:porter AT marine.rutgers DOT edu]
Sent: Thursday, February 12, 2004 9:07 AM
To: nantel AT ecopiabio DOT com
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Performance: Single server, multiple
jukeboxes?
Thanks all for writing! It's comforting to hear others are driving
numerous devices and still have headroom.
Mathieu Nantel wrote:
> Are you really hoping to write at 64-72MB/sec? We've got an M1500 with 2
Maybe I'm naive in hoping to approach drive speed? We're currently
getting close to 10MB/sec (mix of small/large files, no database) on the
2 DLT7000s over fast ethernet even on our ancient Sun Sparcserver 1000E
with NBU 3.4.1. So as far as I know, we're pretty efficient. I was
hoping to reach similar efficiency with the new jukebox over gigabit,
but maybe this won't scale as well as I'm hoping?
> isn't exactly going to affect the machine too much. I don't assume it's
> necessary to mention that you don't want to run your Ultra160 SDLTs on the
> same bus as your ??Ultra40?? DLTs since this will throttle everything to
> ??Ultra40?? Make sure you have a gig of RAM, dual "decent" CPUs, and
that'll
> be enough.
It is indeed necessary to mention this, thanks for doing so! My
(limited) understanding of the dual-channel SCSI controller (Adaptec
39160) is that it would provide us 2 *independent* SCSI chains, each
capable of 160MB/sec. I definitely can't afford to be throttled to the
slower jukebox capabilities of 10MB/sec though. Do I need 2 separate
controllers?
And finally, a software question: With multiple robots on a single
server, can you associate backup classes with a specific robot/jukebox?
Thanks!
-Adam
--
Adam Porter, Information Technology Department
Institute for Marine & Coastal Sciences, Rutgers University
porter AT marine.rutgers DOT edu, 732-932-6555 x510
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