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Re: [Openvpn-users] Openvpn Supports for MultiCPU, multicores?


  • Subject: Re: [Openvpn-users] Openvpn Supports for MultiCPU, multicores?
  • From: Mike Tancsa <mike@xxxxxxxxxx>
  • Date: Fri, 07 Sep 2007 23:57:51 -0400

At 11:44 PM 9/7/2007, Aminuddin wrote:
>Hi guys,
>What kind of supports does openvpn offers for dual-core, quad-core or
>multicpu implementation?
>
>I'm running C2D Intel 6300 (2GB RAM) with more that 90 users connecting to
>it and bandwidth utilization of 80mbit/sec to all the clients. Anyone have
>any experience of adding more users with this kind of high speed
>connections?
>At 125 users, the CPU utilization is at 100% and crash the server but 100
>users, CPU utilization is at 90% and still crash the server.

Have you profiled that the server is doing ? Is it not able to keep 
up forwarding packets, or is it bogged down doing crypto.  Depending 
on your OS, offloading to a crypto accelerator might help or even a 
second core to help with the crypto calcs.  On FreeBSD, something like
http://www.soekris.com/vpn1401.htm
can help reduce CPU usage if you have a lot of simultaneous crypto 
transformations going on and is not that expensive

         ---Mike 

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