On Mon, Jun 2, 2014 at 9:00 AM, Jan Just Keijser <janj...@nikhef.nl> wrote: > - there's a problem with tcp-tcp traffic between VMs
I'm not sure how to diagnose this. I don't have administrative access to the Openstack deployed in my university's cluster so I cannot tell if there is any kind of setting that would affect TCP-over-TCP traffic. I'll inquire about it though. > - there's an MTU problem on the lower TCP link - what kind of performance do > you get with '--tun-mtu 1400' ? I've tried with various values between 5000 and 50000 and all have yielded poor results. I'll run some tests with lower values and come back with some figures. > and the other thing I can think of is the type of virtualization used - the > "free" version of vmware have crippled TCP performance, for example (but not > UDP which results in better network performance with openvpn on VMplayer :) > ) I'm not sure if that is an issue. As far as I know, the virtualization used is KVM, so I think being closer to the hardware than something like VMWare or Virtualbox would prevent such issues. In any case I'll reply with some updated facts. Thank you for your help! :) All the best, Silviu Popescu ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/NeoTech _______________________________________________ Openvpn-users mailing list Openvpn-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-users
