Have you considered to install an additional cluster node as a "Quorumserver"
which runs no services ?
Hi Andreas, yes. The problem is the amount of servers (I'm talking about
more than 50 HA pairs here) and that a node can ONLY be part of one
cluster. So I would need one system for each HA-pair.
10 Servers = 20 HA Servers = 30 Servers in Split site.
How can I overcome this ? Virtualization ? - Maybe.
I could use a third physical server running X virtual servers. Because
the third node does not run ressources, it could run many virtual
machines. But there's OS overhead in RAM and Disk storage and update
maintainance.
So "just" to have a quorum server I would need 50 virtual machines on a
server running 50 Linux kernels with 50x at least 128 MB Memory --> It's
a hubge machine for "just a quorum server" that "basically works for two
node setups with the classical quorum server anyhow (or now ? - thats
what this thread is about)" :)
Of course I could use no server virtualization, but OS virtualization,
but I would need 50 IP's then and I expect problems with the network
(Heartbeat uses a dedicated port).
It may be an option, but it was not number 1) on my list.
Another way could also be, to just setup a 2 node cluster with stonith
via meatware. This allows server maintainance, but automatic failovers
have to be administrator controlled - that's acceptable for the disaster
case I guess.
Robert
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