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Re: Mid Level Managers

To: nv-l@lists.tivoli.com
Subject: Re: Mid Level Managers
From: Ray Schafer <schafer@TKG.COM>
Date: Tue, 15 Dec 1998 00:25:32 -0500
Organization: The Kernel Group
Reply-to: schafer@tkg.com
Sender: Discussion of IBM NetView and POLYCENTER Manager on NetView <NV-L@UCSBVM.UCSB.EDU>
Art,

You may want to evaluate your collection rules as well.  Try using the
"e" option of nvUtil to evaluate the rules used for the collection.  I
use:
timex nvUtil e "<insert rule here>".  Attempt to find a rule that will
evaluate to the same collection that runs faster.  I found that the "~"
operator that allows regular expressions is very efficient.  I used a
rule that matched the "IP Hostname" field to a regular expression. That
way it just returns selection names for nodes.  Also, the fewer "||"'s
or "&&"'s you have the better. I was able to change an "In List" rule to
a regular expression for IP Hostname and move the evaluation time from
over 300 seconds to less than 30.  It made a big difference in both
startup time of nvcold and MLM distribution efficiency.

All these rules are evaluated before being distributed.  If they take a
long time to evaluate, it will slow things down considerably - probably
less so after the fix for APAR  IX79362 is applied.

Art DeBuigny wrote:
>
> That might explain it.  We have four.  And the collections I'm defining are
> rather large.  Its probably trying to update the wrong ones first, getting
> rejected by those MLM's, and getting onto the appropriate one when my back is
> turned.
>
> Any ETA (even rough) on that release?
>
> Thanks
>
> Art DeBuigny
> debuigny@dallas.net
>
> James Shanks wrote:
>
> > Art -
> > Could it be that what you are seeing is described in APAR IX79362?
> > Currently, when you update the collection for any MLM, it gets
> > re-distributed to all MLMs, so the more you have the longer it takes.  The
> > fix for this APAR will change that, so that only the appropriate MLM gets
> > updated.  The fix will be included in V5.1.1  and U459387  for V4 as soon
> > as they are available.
> >
> > James Shanks
> > Tivoli (NetView for UNIX) L3 Support
> >
> > Art DeBuigny <debuigny@DALLAS.NET> on 12/10/98 06:55:34 PM
> >
> > Please respond to Discussion of IBM NetView and POLYCENTER Manager on
> >       NetView <NV-L@UCSBVM.UCSB.EDU>
> >
> > To:   NV-L@UCSBVM.UCSB.EDU
> > cc:    (bcc: James Shanks)
> > Subject:  Mid Level Managers
> >
> > Hello;
> >
> > I have a question concerning the Mid Level Managers under NetView 5.1 on
> > AIX 4.1.5.
> >
> > We have several Mid Level Managers.  When I go to change the collection
> > to add more nodes to its polling list, it seems to take forever for that
> > change to make it to the alias tables on the MIB.  I assume that there
> > is some internal process NetView is running, maybe once a day, to update
> > its MLM's.  Is there a way to 'kick' NetView, making it update the MLM's
> > right away?  Its difficult to test when you have to wait so long to get
> > the collection moved over to the MLM.
> >
> > Art DeBuigny
> > debuigny@dallas.net


--
Ray Schafer                   | schafer@tkg.com
The Kernel Group              | Network Computing Consulting

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