Thread: pg_upgrade in primary/standby architecture

pg_upgrade in primary/standby architecture

From
Murthy Nunna
Date:

Hello PGAdmins,

 

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.

 

Scenario:

1.      Primary and standby are running 9.1.6 and I want to upgrade both to 9.2.4 (or 9.2.6)

2.      Streaming replication is used

3.      I cannot use pg_dump due to the size of the database. I have to use pg_upgrade

 

Thanks,

Murthy

Re: pg_upgrade in primary/standby architecture

From
Venkata Balaji Nagothi
Date:

On Tue, Mar 18, 2014 at 1:52 PM, Murthy Nunna <mnunna@fnal.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

Re: pg_upgrade in primary/standby architecture

From
Murthy Nunna
Date:

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@gmail.com]
Sent: Tuesday, March 18, 2014 12:47 AM
To: Murthy Nunna
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] pg_upgrade in primary/standby architecture

 

 

On Tue, Mar 18, 2014 at 1:52 PM, Murthy Nunna <mnunna@fnal.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

Re: pg_upgrade in primary/standby architecture

From
Glyn Astill
Date:

> From: Murthy Nunna <mnunna@fnal.gov>
>To: Venkata Balaji Nagothi <vbnpgc@gmail.com>
>Cc: "pgsql-admin@postgresql.org" <pgsql-admin@postgresql.org>
>Sent: Tuesday, 18 March 2014, 12:49
>Subject: Re: [ADMIN] 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? 
> 

You could use Slony-I for this, and it should be fairly quick to set up now that as of 2.2 you can add multiple tables
andsequences in one go with SET ADD TABLE. 


Re: pg_upgrade in primary/standby architecture

From
"Gilberto Castillo"
Date:

>
>
>
>> From: Murthy Nunna <mnunna@fnal.gov>
>>To: Venkata Balaji Nagothi <vbnpgc@gmail.com>
>>Cc: "pgsql-admin@postgresql.org" <pgsql-admin@postgresql.org>
>>Sent: Tuesday, 18 March 2014, 12:49
>>Subject: Re: [ADMIN] 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?
>> 
>
> You could use Slony-I for this, and it should be fairly quick to set up
> now that as of 2.2 you can add multiple tables and sequences in one go
> with SET ADD TABLE.

I have a small guide that can be useful.

Saludos,
Gilberto Castillo
La Habana, Cuba
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Re: pg_upgrade in primary/standby architecture

From
Venkata Balaji Nagothi
Date:

On Tue, Mar 18, 2014 at 11:49 PM, Murthy Nunna <mnunna@fnal.gov> wrote:

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?


In my previous email, i suggested/asked the possibility of using Slony replication in your environment. It depends on lot of factors (database size, number of tables, pl/pgsql code etc..) though. Please let us know your thoughts on this. We can probably move further on this discussion.

Venkata Balaji N

Sr. Database Administrator
Fujitsu Australia