On Mon, Sep 13, 2010 at 03:52:29PM +0100, JL wrote: > OK, More information: > > I hope someone who is up on ipvs kernel side is listening!
I am listening, sorry for not responding earlier. > If a backup machines receives an IPVS state update packet (the ones > sent to 224.0.0.81) with a certain number of connections in it > (somewhere between two and eight, inclusive, will trigger it) then SI > goes to 100% on the backup immediately. > > Firewalling 224.0.0.81 insulates you from the problem (although, of > course, is unsuitable for a live deployment). Presumably turning off connection synchronisation has the same effect. > Feeding in only one connection at a time (slowly enough that the each > have their own IPVS packet) doesn't trigger the problem. So it occurs if the number of synchronised connections in a single packet is between 2 and 8. So 1 is ok, and so is 9? > This happens with linux 2.6.35.4, but not 2.6.27.45. That is a fairly wide number of kernel versions. But if it is easy to reproduce then it should be fairly easy to track down. _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
