On 13/06/2013, at 9:55 PM, Andrey Groshev <gre...@yandex.ru> wrote: > > > 12.06.2013, 03:45, "Andrew Beekhof" <and...@beekhof.net>: >> On 12/06/2013, at 4:48 AM, Michael Schwartzkopff <mi...@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. > > Yes, that's better. But in a good data storage - 20 TB will not be > superfluous.
It doesn't have to be able to run services, it only needs to contribute to quorum. > >> >>> Be sure to have fencing configured. >>> >>> -- >>> Dr. Michael Schwartzkopff >>> Guardinistr. 63 >>> 81375 München >>> >>> Tel: (0163) 172 50 98 >>> _______________________________________________ >>> Pacemaker mailing list: Pacemaker@oss.clusterlabs.org >>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker >>> >>> Project Home: http://www.clusterlabs.org >>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf >>> Bugs: http://bugs.clusterlabs.org >> >> _______________________________________________ >> Pacemaker mailing list: Pacemaker@oss.clusterlabs.org >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker >> >> Project Home: http://www.clusterlabs.org >> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf >> Bugs: http://bugs.clusterlabs.org > > _______________________________________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
