Are you using venet or veth? 

----- Original Message ----- 
From: "Russell Miller" <[email protected]> 
To: [email protected] 
Sent: Monday, February 23, 2009 12:34:54 PM GMT -05:00 US/Canada Eastern 
Subject: [Users] Massive performance degradation 

Hi all, 

One of the things that I have been tasked with at work is doing 
detailed performance analysis of openvz. 

I have discovered that when running more than one guest and saturating 
the bandwidth of both of them (I ran netperf to the same host on two 
guests at the same time) I take a 20% hit in performance, invariably. 
ie (approximately). 

One guest: 900 Mb/s 
Two guests: 700Mb/s total, around 350Mb/s per guest. 

This is obviously a significant hit, and I can think of no reason 
offhand for it. Has anyone here seen this kind of degradation? 

--Russell 
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