[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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>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://bugs.clusterlabs.org
>
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> Bugs: http://bugs.clusterlabs.org
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