[lvs-users] IPVS sync behavior

[David Black]

Yes, I have several IPVS pairs running, some on vanilla 2.6.17.7, others
on 2.6.16-xen (Xen 3.0), 2.6.18-xen (Xen 3.1) and 2.6.9-57.EL (CentOS
4).  All show the same +1.0 load av behavior when
ipvs-syncmaster/-syncbackup are running.

Since you mention it, I did have problems with heartbeat on Xen - no
network lockups but just heartbeat being fussy about timing, and decided
to try keepalived (VRRP)/IPVS, which solved at least the timing issues. 
No kernel issues as you describe with piranha either.

Dave

Dan Yocum wrote:
> Hi Dave,
>
>
> Hopefully you don't have ipvs or lvs running on your dom0?  Before I 
> knew any better I put the LVS directors on 2 dom0s and ended up with 
> lots of softlockup_tick kernel "panics" which would invariably bring the 
> network to a screeching halt on domUs for several seconds - long enough 
> for nanny (I'm using piranha) to mark a server as offline.
>
> Moving the LVS directors to their own xen VM solved these kernel lockups 
> and network problems.
>
> I'm wondering if your first point may have something to do with this 
> problem.
>
> Cheers,
> Dan
>
>
>
>