Re: Switchover of Master and Slave roles - Mailing list pgsql-admin

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From: Ray Stell <stellr@cns.vt.edu>
To: A J <s5aly@yahoo.com>
Cc: pgsql-admin@postgresql.org
Sent: Tue, June 7, 2011 2:12:44 PM
Subject: Re: [ADMIN] Switchover of Master and Slave roles

On Tue, Jun 07, 2011 at 09:32:31AM -0700, A J wrote:
> Hello,
> I am trying to switch the master and slave roles in a test I am doing with
> streaming replication in 9.1 beta.
>

http://www.postgresql.org/docs/9.1/static/warm-standby-failover.html

Once failover to the standby occurs, there is only a single server in
operation. This is known as a degenerate state. The former standby is
now the primary, but the former primary is down and might stay down. To
return to normal operation, a standby server must be recreated, either
on the former primary system when it comes up, or on a third, possibly
new, system. Once complete, the primary and standby can be considered
to have switched roles.