Re: Create a logical and physical replication

Yes it is possible.

Get Outlook for Android<https://aka.ms/ghei36>

________________________________
From: Ashok Kumar Tiwari <[email protected]>
Sent: Tuesday, November 5, 2019 7:12:45 PM
To: Kyotaro Horiguchi <[email protected]>
Cc: Rui DeSousa <[email protected]>; Shital A <[email protected]>; [email protected] <[email protected]>; [email protected] <[email protected]>
Subject: Re: Create a logical and physical replication

its possible to cascade a logical replication from a binary slave replica?

[image.png]

On Tue, Nov 5, 2019 at 11:25 AM Kyotaro Horiguchi <[email protected]<mailto:[email protected]>> wrote:
Hello.

At Mon, 4 Nov 2019 19:05:24 +0530, Ashok Kumar Tiwari <[email protected]<mailto:[email protected]>> 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


--
Ashok Kumar Tiwari,
Senior Technical Consultant,
[email protected]<mailto:[email protected]>,
M:+91-9657628833



[http://www.blystreecare.com/images/tree-clipart-4.gif] Save a tree. Please avoid printing this email unless necessary.

***** Email confidentiality notice *****

This message is private and confidential. If you have received this message in error, please notify us and remove it from your system.