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.



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