topic Re: ServiceGuard clusters distance between nodes in Operating System - HP-UX

ServiceGuard clusters distance between nodes

Adam Garsha — Wed, 25 Jan 2006 08:50:54 GMT

How far apart can two nodes be before you need to start looking at the special long-range ServiceGuard clusters?

Re: ServiceGuard clusters distance between nodes

melvyn burnard — Wed, 25 Jan 2006 08:55:49 GMT

up to around 100km using fibre channel and normal Serviceguard.
It is referred to as Campus Cluster, Extended Cluster, or Stretched Cluster.
There is a discussion on this in the Designing Disaster Tolerant Clusters manual:
http://docs.hp.com/en/B7660-90017/B7660-90017.pdf

Re: ServiceGuard clusters distance between nodes

Frank de Vries — Wed, 25 Jan 2006 09:55:31 GMT

If it is any help, at our plant the
two nodes are about a kilometer apart linea recta, but the fibre cabling (which is going
via via) must be 1,5 times that.

We did however slightly up the timeout parameter for the heartbeat, but this was more out of safety-principle then scientific research.

So far it is running ok.