[Pacemaker] Two resource nodes + one quorum node

Andrey Groshev greenx at yandex.ru
Thu Jun 13 12:24:25 UTC 2013



13.06.2013, 16:07, "Andrew Beekhof" <andrew at beekhof.net>:
> On 13/06/2013, at 9:55 PM, Andrey Groshev <greenx at yandex.ru> wrote:
>
>>  12.06.2013, 03:45, "Andrew Beekhof" <andrew at beekhof.net>:
>>>  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.
>>  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.
>
That is, there is no way to switch the node into standby mode from a pacemaker script/config?
>>>>   Be sure to have fencing configured.
>>>>
>>>>   --
>>>>   Dr. Michael Schwartzkopff
>>>>   Guardinistr. 63
>>>>   81375 München
>>>>
>>>>   Tel: (0163) 172 50 98
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>>>>
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>>  Bugs: http://bugs.clusterlabs.org
>
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