On 6/28/18 08:47, Michael Paquier wrote:
>>> There could be some cases where
>>> copying a physical slot also makes sense.
>> I've thought that but I didn't find concrete use case. That's why I
>> started with only logical slot.
> Let's imagine the case of a single base backup which is associated to a
> given replication slot, and that this backup is then used to spawn
> multiple standbys where each one of them needs a separate slot to
> consume changes at their pace. If you can copy the slot used in the
> first backup, then both nodes could consume it. That looks useful to
> me to make sure that both slots are based a consistent point.
I think this use case of cloning replicas would also be interesting in
the logical slot case.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
