[lvs-users] LVS-DR performance not good as expected

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Subject: [lvs-users] LVS-DR performance not good as expected
From: Dongsheng Song <>
Date: Thu, 21 Mar 2013 14:29:48 +0800
Hi all,

I setup a testing LVS-DR cluster, use 1 director with 8 Windows real server.

ALL server running as VMware ESX 5.1 guest.

The director have 2 cores (X7550@2GHz), 2 GB memory, Debian 6.0 with
kernel 2.6.32-5-amd64.
The Windows server have 4 cores  (X7550@2GHz), 4GB memory, Windows
2008 Standard SP2.

Linux use vmxnet3, Windows use Intel(R) PRO/1000 MT, all use default
driver with default settings.

When I running load testing against VIP from 4 client machines, 2
JMeter instance per client machine,
i.e. 8 JMeter instance, I got about throughput is 8390/minute.

Then I running one JMeter instance access one real server (of course,
this is not cluster), the total
8 JMeter instances can get up to 9440/minute.

That's said, when I use LVS-DR, I got 12.5% performance degrade.

Any suggestion ?


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