Hi Raul,

> On 20. Nov, 2020, at 11:45, Raul Kaubi <raulka...@gmail.com> wrote:
> 
> Hmm, ok.
> 
> But how is this possible..?
> 
>  when b.sender>0 and c.receiver>0 then
>             'Primary+Replica'
> 
> Raul

this happens for example if you have a primary a and replica b running as a 
normal cluster (we use Patroni for automatic failover) and then add another 
replica c to the existing replica b, effectively replicating: a => b => c In 
this case, b would be the replica of a, but also be the primary for c.

It's called cascading replication.

Cheers,
Paul

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