I don't have benchmarks, but have sites running haproxy on Xen VMs with apache on Xen VMs and can pump 120 Mbps and 80 million hits a day through one haproxy VM and that is with haproxy doing rsysloging of all requests to 2 remote rsyslog servers on top of the serving of requests with some layer 7 acls to route requests to different backends. Only 50-75 backend servers total though.

http keepalive helped alot with the type of requests that haproxy serves so it reduced the work load some from the non-keepalive version.

I also use auto-splice on there to reduce overhead somewhat.

On 10/26/10 7:38 AM, Ariel wrote:
Does anyone know of studies done comparing haproxy on dedicated hardware vs 
virtual machine?  Or perhaps some virtual machine specific considerations?
-a

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