Re: Synchronized snapshots versus multiple databases

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От Andrew Dunstan
Тема Re: Synchronized snapshots versus multiple databases
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Msg-id 4EA19FCA.30904@dunslane.net
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Ответ на Re: Synchronized snapshots versus multiple databases  (Florian Pflug <fgp@phlo.org>)
Ответы Re: Synchronized snapshots versus multiple databases
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On 10/21/2011 12:05 PM, Florian Pflug wrote:
> On Oct21, 2011, at 17:36 , Tom Lane wrote:
>> 1. Restrict exported snapshots to be loaded only by transactions running
>> in the same database as the exporter.  This would fix the problem, but
>> it cuts out one of the main use-cases for sync snapshots, namely getting
>> cluster-wide-consistent dumps in pg_dumpall.
> Isn't the use-case getting consistent *parallel* dumps of a single database
> rather than consistent dump of multiple databases? Since we don't have atomic
> cross-database commits, what does using the same snapshot to dump multiple
> databases buy us?

That was my understanding of the use case.

cheers

andrew


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