Re: controlled switchover with repmgr

Dylan Luong <Dylan(dot)Luong(at)unisa(dot)edu(dot)au> wrote:

> Hi
>
>
>
> In a controlled switchover from master to slave with repmgr, what is the
> downtime timeframe? Seconds?

yes, seconds.

>
> What is the internal process involved in a switchover with repmgr? Is the
> process all automated? Will there be data loss?

repmgr first attempts to stop the master. If this is successfull, it
will promote the standby, rewinds the old master using pg_rewind and
start it as a new standby. It is all automated

A switchover is a controlled and planned action, for instance for
maintenance. In this case you can take care that there are no open
transactions running on the master, without data loss.

https://github.com/2ndQuadrant/repmgr/blob/master/README.md

Regards, Andreas Kretschmer
--
Andreas Kretschmer
http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services