Re: [GENERAL] Logical replication

On 5/1/17 10:32, Adrian Klaver wrote:
> On 04/30/2017 09:07 AM, Adrian Klaver wrote:
>> I have started looking at the logical replication feature in Postgres
>> 10. One thing I have no been able to determine is the interoperability
>> between it and pglogical(www.2ndquadrant.com/en/resources/pglogical/). I
>> know the one is derived from the other, what I can not find is whether a
>> Postgres 9.4 instance with the pglogical extension installed can
>> communicate with a Postgres 10 instance using the built in code?

> Some testing says the answer is no:

correct

> If I am correct, this means from 9.4 <--> 10 and points in between you
> would need to use the pglogical extension on both ends.

correct

> Going from 10
> --> you could use the builtin logical replication. This leads to another
> question. Is is possible to use both at the same time?:
>
> 9.4       --->   10(instance 1)    ---> 10(instance 2)
> pglogical        pglogical
>                   builtin                builtin

That is possible.

pglogical will continue to exist, so you can also keep using it if you
already have it.

--
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services