Re: Moving a large DB (> 500GB) to another DB with different locale

On Fri, Jan 15, 2016 at 3:41 PM, Andreas Joseph Krogh <andreas@visena.com> wrote:

På fredag 15. januar 2016 kl. 14:33:24, skrev Shulgin, Oleksandr <oleksandr.shulgin@zalando.de>:

On Fri, Jan 15, 2016 at 1:02 PM, Andreas Joseph Krogh <andreas@visena.com> wrote:

 

I see that wal_level = 'logical', and that is a problem for us as we already use wal_level = 'hot_standby' on this installation as it replicates to another server.

 

Is it possible to use pglogical together with hot_standby streaming-replication?

 

Well, the wal_level change is just a matter of database restart: you got to do that once in a while anyway, e.g. for minor version updates.  I would expect you only need this wal_level on the walsender side, thus for pglogical_output, the logical decoding plugin.

 

My point is that we cannot not have streaming-replication, so we need to keep wal_level = 'hot_standby' AFAIU. Is there a way to do both streaming-replication and pglogical for just replicating one of may databases in the same cluster?

 

But logical is "greater than" hot_standby, so you can still have streaming replication with wal_level = logical.

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Andreas Joseph Krogh

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