Re: pg_upgrade in primary/standby architecture

Hi Venkata Balaji,

Thank you!

Yes, streaming replication cannot be setup between two different versions. That is true.

I am looking to upgrade both primary and standby with minimal outage to application..... I want to know if it is possible. If it is not possible, is there any architecture where we can minimize upgrade related outage?

Murthy

From: Venkata Balaji Nagothi [mailto:vbnpgc(at)gmail(dot)com]
Sent: Tuesday, March 18, 2014 12:47 AM
To: Murthy Nunna
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] pg_upgrade in primary/standby architecture

On Tue, Mar 18, 2014 at 1:52 PM, Murthy Nunna <mnunna(at)fnal(dot)gov<mailto:mnunna(at)fnal(dot)gov>> wrote:

I am wondering if there is a way we can leverage replication set up to minimize outage caused by pg_upgrade in case of major version upgrade. We use streaming replication.

If i got you correct - Streaming Replication cannot be setup between two different versions of PostgreSQL.

Scenario:

1. Primary and standby are running 9.1.6 and I want to upgrade both to 9.2.4 (or 9.2.6)
Though its not an straight forward or easy way to upgrade a big database - Did you think of Slony as an option ?

We have used Slony in the past to upgrade databases to reduce lengthy downtime. This depends on lot of factors though.

Regards.

Venkata Balaji N

Sr. Database Administrator
Fujitsu Australia