[lvs-users] IPVS sync behavior

[Dan Yocum]

Hi Dave,

David Black wrote:

> . When ipvs-sync* is running, the box maintains a load av of 1.0.   I
> read this has something to do with the kernel syncdaemon code using the
> wrong sleep function.  Anyone know in which kernel this might be fixed
> (beyond 2.6.17.7)?   I might just patch the existing kernel since it was
> built from source anyway, and has proven otherwise quite stable.  But I
> have some other IPVS boxes running 2.6.18-xen (as a dom0).

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



-- 
Dan Yocum
Fermilab  630.840.6509
yocum at fnal.gov, http://fermigrid.fnal.gov
Fermilab.  Just zeros and ones.