Re: How to move a postgres server

Im a relative newbie…

Can I create a new Postgresql server with the same name as the running server?

I need to preserve both the database name as well as the server name. The only difference is the hostname.

We can take an outage.

From what I read, it seems that all I need to do is copy the files from one postgres server directory over to the other on the new host, then when the host reboots it will start that database automatically?

 

Also, im a bit worried about how to preserve the config of the server if I am forced to create a new one rather than just copying it. How can I make sure the postgres server config is copied properly?

 

 

From: Ahmed, Nawaz [mailto:Nawaz@fast.au.fujitsu.com]
Sent: Friday, February 16, 2018 1:52 PM
To: 'Ron Watkins'; pgsql-admin@lists.postgresql.org
Subject: RE: How to move a postgres server

 

 

 

 

From: Ron Watkins [mailto:rwatki@gmail.com]
Sent: Saturday, 17 February 2018 6:05 AM
To: pgsql-admin@lists.postgresql.org
Subject: How to move a postgres server

 

I have a postgres server with 2 databases residing on a host which is being de-commissioned.

I need to move the postgres server itself, including the databases to a new host.

All the stuff I can find on the web talks about moving the database, but I need to move the entire server.

Am I missing something here?

Am I suppose to create an identical server on the new host (with the same server name), then backup/restore the databases individually? Is there not any way to move the entire server?

 

Hi,

 

The best way to do that with minimal downtime would be to use streaming replication. But that depends on a few other findings as below

 

1)      Version of the PostgreSQL server

2)      Size of the databases

3)      What OS: Linux/Win etc. and their versions

 

If the downtime is affordable, then build a new server with most recent patch updates and an installation of the same PostgreSQL version on it. Then, shutdown the database cluster, copy the files across and bring up the cluster on the new server. Although, I would not recommend this approach but this is the simplest way to move the PostgreSQL server when downtime is not a big deal.

 

~

 

Nawaz Ahmed

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