Re: Difference between UDR and BDR replication

From: Craig Ringer <craig(at)2ndquadrant(dot)com>
To: Kaushal Shriyan <kaushalshriyan(at)gmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Difference between UDR and BDR replication
Date: 2016-01-28 13:02:55
Message-ID: CAMsr+YE2e_3bjLhfyoke0Scz5Lj4CWwL9Ggg4JnicsHbskxSCA@mail.gmail.com
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On 28 January 2016 at 19:16, Kaushal Shriyan <kaushalshriyan(at)gmail(dot)com>
wrote:

> Hi,
>
> Can somebody please help me understand the difference between UDR and BDR
> with examples?
>

BDR is for multiple masters that all replicate to each other.

UDR takes data from one server and copies it to another. One way. (By the
way, I strongly advise you to now use pglogical instead of UDR).

BDR:

A <==> B

UDR/pglogical:

A ==> B

--
Craig Ringer http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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