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New LVS installation - wierd problems

To: <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: New LVS installation - wierd problems
From: Nate Stone <nate@xxxxxxxxxxxx>
Date: Tue, 21 Aug 2001 14:52:28 -0400 (EDT)
Hi all!  I'm pretty new to LVS, but we've had some short term success and
look forward to using the system as our site expands.  However, we're
having some problems I've never seen before and I really can't tell if LVS
is causing them or not.

We currently have 1 director and 2 real servers which use NFS to mount the
same web content.  We serve about 45 million pages a month and are now
only on our 8th day of using LVS on our new server cluster.  As we were
ramping up traffic, we started to have some problems with the load average
on our real servers going extremely high and then the Apache processes
going into "D" mode (uninterruptible sleep) mode.  This causes many
problems which ultimately require us to reboot the affected real server.

My first instinct is that we're saturating NFS, but I wanted to know if
anyone thought that IPVS might be causing the problems or if anyone had
any ideas that could lead to a solution.

I hope it isn't an inappropriate question for this board - I'm just a
little too new to LVS to be able to tell if it might be contributing to
the problem so I was hoping that someone with a little more expertise
might be able to definitively rule an LVS problem out.

Thanks a bunch.

-Nate
Nate Stone
CTO
keenspot.com





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