On 2014-01-24T08:16:03, Ulrich Windl <[email protected]> wrote:
> We have a server with a "network traffic light" on the front. With
> corosync/pacemaker the light is constantly flickering, even if the cluster
> "does nothing".
> So I guess it's normal.
Yes. Totem and other components have on-going health checks, so there's
constant background traffic. But nothing major.
> you that traffic will increase if your configuration grows and if the cluster
> actually does something. I don't know if "communicate like mad" was a design
> concept, but on out HP-UX Service Guard cluster there was only the heartbeat
> traffic (configured to be one packet every 7 seconds (for good luck reasons
> ;-)) when the cluster was idle.
HP SG runs an entirely different protocol and is an entirely different
architecture.
> Obviously the cLVM mirroring causes the corosync problems:
I've never, ever observed this during testing and my continuously
running cLVM RAID setup. Looks like an overload during resync, though.
You need faster NICs ;-)
Regards,
Lars
--
Architect Storage/HA
SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB
21284 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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