Re: [lvs-users] LVS Centos all in Vmware

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVS Centos all in Vmware
From: "Michael von Guggenberg" <michael.vonguggenberg@xxxxxxxxx>
Date: Thu, 30 Aug 2007 10:32:52 +0200
Im using recompiled kernels with HZ=100,, and 
ntpd, so time isnt a problem in my VM's.  

-----Ursprüngliche Nachricht-----
Von: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx 
[mailto:lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx] Im Auftrag von Graeme Fowler
Gesendet: Donnerstag, 30. August 2007 10:22
An: users mailing list.
Betreff: Re: [lvs-users] LVS Centos all in Vmware

On Thu, 2007-08-30 at 10:16 +0200, Michael von Guggenberg wrote:
> Ok tried the mentioned solutions, disabeld tx rx chechsums with 
> ethtool, tried to echo 0 > /proc/sys/net/ipv4/tcp_sack on the involved 
> servers and moved the RS to a diffrent vmware host, symptom remains the same.
> Now i have noticed that while one apache server is shutdown i get the 
> ip_vs_send_async error on every second hit. 

Are your guests running with any specific "clock=" bootloader options? It's 
quite plausible that the sync traffic is getting mangled by the ability of 
vmware guests to slip time back and forth.


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