[Pacemaker] Two resource nodes + one quorum node

[Michael Schwartzkopff]

Am Mittwoch, 12. Juni 2013, 09:42:13 schrieb Andrew Beekhof:
> On 12/06/2013, at 4:48 AM, Michael Schwartzkopff <misch at clusterbau.com> 
wrote:
> > Am Dienstag, 11. Juni 2013, 22:33:32 schrieb Andrey Groshev:
> > > Hi,
> > > I want to make Postgres cluster.
> > > As far as I understand, for the proper functioning of the cluster must
> > > use a quorum (ie, at least three nodes).
> > 
> > No. Two nodes are enough. See: no-quorum-policy="ignore".
> > 
> > > But if the databases are large - it is
> > > too expensive.
> > > One master, two slave, and in addition backup.
> > > So I'm trying to make the schema with one master, one slave, and one
> > > node
> > > only for a quorum.
> > 
> > One master and one slave should be enough.
> 
> But three nodes is better.

Definitely yes. But if he has financial limitations (see above) it is better 
to invest in good fencing than in a third node.

-- 
Dr. Michael Schwartzkopff
Guardinistr. 63
81375 München

Tel: (0163) 172 50 98
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