Linux heartbeat and long-haul networks

[Kent Borg]

Richard Pieri wrote:
> Does anyone have experience with Linux heartbeat over long-haul networks?  I'm looking at setting up a failover between two sites.  Specifically:
>
> I have two Xen dom0 servers currently in the same rack, using DRBD-backed logical volumes for domU images.  They currently use a manual switchover procedure.  What I want to do is move one of the two dom0 servers to an off-site data center and set up an automatic failover for my domUs.  The latter should be easy with Pacemaker but my concern is heartbeat latency causing spurious failover.
>   

Ah, split-brain!

Possibly you want redundant heartbeat links. (Even if you have only one 
link out, maybe bounce through different third points.)

An interesting blog post: http://lemonnier.se/erwan/blog/item/53/


-kb