Unfortunately, no can not do what you have proposed because to make B a slave 
of A requires that you make binary copy of A to B and then turn on replication 
from A to B which will break B to C replication. 

What you can do with your current configuration is do a pg_dumpall or pg_dump 
of A and load that logical dump into B which would then replicate the data to C.

Dennis

> On Dec 2, 2015, at 7:24 PM, Florin Andrei <flo...@andrei.myip.org> wrote:
> 
> I have an old production instance, let's call it A, that I need to 
> decommission soon.
> 
> I've created a pair of new instances, B and C, with B replicating to C, 
> following this procedure:
> 
> https://wiki.postgresql.org/wiki/Streaming_Replication
> 
> But B and C have no data yet. I need to transfer all data from A into B.
> 
> Can I daisy-chain streaming replication? In other words, temporarily setup 
> replication like this:
> 
> A ==> B ==> C
> 
> And after the transfer is done, just remove A from the scheme.
> 
> 
> -- 
> Florin Andrei
> http://florin.myip.org/
> 
> 
> -- 
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