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Re: CPU Spike every 10 hours

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: CPU Spike every 10 hours
From: Paul Baker <pbaker@xxxxxxxxxxxxxxx>
Date: Thu, 14 Mar 2002 12:01:07 -0600
On Thursday, March 14, 2002, at 05:44 AM, Radomski, Mike wrote:

I have an update to the problem.  It has been over 10 hours since the last
[snip]

After shutting off the serial heartbeat, the over all load dropped about .02.  I have not seen the sustained spike since.
Does anyone have any suggestions on the serial connection problem?
I had major reliability issues when I tried using the serial connection 
with heartbeat. I attributed it to poor chipset design from Intel. My 
load balancers are 1U's Celeron systems that use that crappy i810 
chipset. Pretty much whenever there was any load on the server (such as 
during rsync replication between the master and slave loadbalancers), 
the serial connection would completely timeout. Which would cause 
complete havoc on my lvs. The slave would then think the master was 
down, and start to bring itself up as the director. Let me tell you from 
experience, it really sucks when you have two directors fighting over 
arp for the ip addresses of the lvs. So I just decided to bite the 
bullet and switch from serial heartbeats to udp. I haven't had a problem 
since.
-Paul Baker



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