From: | A J <s5aly(at)yahoo(dot)com> |
---|---|
To: | Ray Stell <stellr(at)cns(dot)vt(dot)edu> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: Switchover of Master and Slave roles |
Date: | 2011-06-07 18:33:56 |
Message-ID: | 264025.13168.qm@web120005.mail.ne1.yahoo.com |
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Thread: | |
Lists: | pgsql-admin |
>>To return to normal operation, a standby server must be recreated, either on the
>>former primary system when it comes up<<
What does it exactly mean to 'recreate a standby server' ? Can I not use the
datafiles on the former primary and just let it sync and get the incremental
from the new primary ? Do I have to remove all the data files from the former
primary and get all the datafiles through rsync (or other similar manner) from
the new primary ?
________________________________
From: Ray Stell <stellr(at)cns(dot)vt(dot)edu>
To: A J <s5aly(at)yahoo(dot)com>
Cc: pgsql-admin(at)postgresql(dot)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.
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