Dirk H. Schulz
2008-Dec-01 11:02 UTC
Re: Stability of XEN under high load Re: Stability of XEN under high load Re: [xen-users] Stability of XEN under high load
We do not have a problem of losing the bridges - they are still there, and brctl shows the interfaces of the disconnected domUs still on the bridge. There is just no connection to the outside world any more. E.G.: sending pings between 2 domU (one of which is in the problematic disconnected state) and running tcpdump on both domUs shows: - a ping from the disconnected domU to the other does not reach the interface of the dead domU internally: tcpdump does not register anything! - a ping from the other domU to the disconnected one does not reach the interface of the disconnected domU. So this could be a problem with the domU kernel. But since this is a hvm domU it is a standard kernel - I guess it must the network backend drivers, then. The dom0 and domUs are ia64 (Itanium)-Systems, which could mean that we hit an ia64 specific bug. Any idea? Every hint and help is greatly appreciated. Dirk (working with Bernd, see below)> I saw a problem of losing network bridges before that was related to > problems with spanning tree. You may be experiencing a similar problem > > Rob Aronson > Practice Manager, Novacoast > USA > > > On Sun, Nov 30, 2008 at 12:13 AM, Bernd Gotschy <Bernd.Gotschy@...> wrote: > > Hallo, > > we have a XEN server with Redhat 5.2 and XEN 3.0.3. We have two > problems. > We build an Oracle RAC with two XEN guest Redhat 4.4. When we add more > then 3 GB of RAM we cannot work with shared disks between the guests. > Looks like a XEN bug. We have to reduce the RAM to max. 3 GB. > Major problem is that under high load we loose some of the network > interfaces and cannot get them working unless we reboot the guest. > We need RH 4.4 as guest operating system. The guests are HVM. > We have two bridges defined for the networker communication. It > seem one bridge is no longer functional. We have a XEN IA64 server. > > Any idea how to solve this problem? > > regards > Bernd > > _______________________________________________ > Xen-users mailing list > Xen-users@... > http://lists.xensource.com/xen-users > > > > _______________________________________________ > Xen-users mailing list > Xen-users@... > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users