I can see an audit taking that long if there is considerable NBU/other
activity during the audit. We only have 3000 slots active for our SL8500,
and when there is other activity other than the audit, the robot stops
what it is doing, grabs a tape and mounts/unmounts it, and then gets back
to its audit. We have our tapes distributed well enough, and the audit
takes no more than 25 minutes, when there is no activity.
"Herbert.George" <George.Herbert AT SunTrust DOT com>
Sent by: veritas-bu-bounces AT mailman.eng.auburn DOT edu
02/08/2010 12:02 PM
To
"Dean" <dean.deano AT gmail DOT com>, "Justin Piszcz" <jpiszcz AT lucidpixels
DOT com>,
<veritas-bu AT mailman.eng.auburn DOT edu>
cc
Subject
Re: [Veritas-bu] Any ACSLS experts in the house?
I am in the same situation as Dean with regard to the SL8500. I seem to
recall though that ACSLS takes less time for an audit if the library is
put into maintenance mode using ACSLS (vary <acs or lsm>, diagnostic)
before opening the door. I don’t know whether that is feasible for you or
how it will work with the SL8500, but you might want to give it a try.
Best,
George Herbert
Basline Storage Engineer - Backup
SunTrust Banks, Inc.
Live Solid. Bank Solid.
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Dean
Sent: Sunday, February 07, 2010 12:01 AM
To: Justin Piszcz; veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Any ACSLS experts in the house?
Jeez, I haven't worked with a SL8500 - just the old 9310s, but I
understand the differences. Does it really take up to 1.5 hours to audit
an LSM? Jeepers! I currently work with a couple of fully loaded ~2000 slot
IBM TS3500s (or whatever the latest designation is), and I'm sure a full
physical inventory doesn't take more than 20 minutes. The only have one
"gripper" too. I've stood there several times and watched the whole
process through the glass panel and I'm quite sure I couldn't have stood
there for 1.5 hours. My attention span is not that long.
I can't help with a script or anything to automate what you want to do.
But you might also want to consider how doing this might affect mount
times, if that's important to you. Depending on which LSM(s) your drives
are in, doing this might cause a lot more pass-thrus; the process where a
tape gets passed from one LSM to another. It was a fairly slow operation,
although I'm sure it's been improved since the 9310 days. But I guess you
might have to weigh up what is more important to you? The time it takes to
do a physical inventory, or your average mount time.
Just some thoughts :)
Cheers
Dean
On Fri, Feb 5, 2010 at 11:17 PM, Justin Piszcz <jpiszcz AT lucidpixels DOT com>
wrote:
Hi,
I opened a case with Oracle but thought I would ask here.
If you have an SL8500, it has 4 LSMs.
Example:
1 (2500 slot/filled)
2 (2500 slot/filled)
3 10 tapes
4 10 tapes
If you have LSMs 1,2 filled to capacity.
When the robot does its audit after maintenance (opening doors) the robots
in LSMs 3,4 will finish auditing quickly. Then its another ~1-1.5hrs for
LSMs 1,2.
If they were all equal it would cut audit times dramatically.
Has anyone written a script or have documentation on balancing tapes
between the LSMs?
The firmware at least of 4.14 does not seem to do this for you.
Justin.
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