From: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> |
---|---|
To: | ashokt(at)ohumhealthcare(dot)com |
Cc: | rui(at)crazybean(dot)net, brightuser2019(at)gmail(dot)com, pgsql-general(at)lists(dot)postgresql(dot)org, pgsql-admin(at)lists(dot)postgresql(dot)org |
Subject: | Re: Create a logical and physical replication |
Date: | 2019-11-05 05:54:41 |
Message-ID: | 20191105.145441.1121905199858654119.horikyota.ntt@gmail.com |
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Lists: | pgsql-admin pgsql-general |
Hello.
At Mon, 4 Nov 2019 19:05:24 +0530, Ashok Kumar Tiwari <ashokt(at)ohumhealthcare(dot)com> wrote in
> is it possible in postgres to create one physical replica for DR(data
> recovery purpose) and another one logical replica for reporting purpose
A physical replication standby cannot be a publisher. You will find
that CREATE PUBLICATION fails.
> master --------> physical standby (for DR Purpose)
> |
> |
> |
> |
> logical replica for reporting purpose
>
> ------------------ or cascading logic replication
>
> master --------> physical standby (for DR Purpose) ------------- >
> logical replica for reporting purpose
The former works (as documented in [1]) but the latter doesn't.
By the way, If I'm not missing anything I don't find a description on
this restriction in the documentation. Shouldn't it be in [2], or
[1]?
[1]: https://www.postgresql.org/docs/12/logical-replication.html
[2]: https://www.postgresql.org/docs/12/logical-replication-restrictions.html
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
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