Re: Detecting master/slave

On 21 Nov 2014 22:14, "Steve Pribyl" <Steve(dot)Pribyl(at)akunacapital(dot)com> wrote:
>
> Is there a better/recommended way to determine which host in a cluster is
the master or slave besides rescue.conf or pg_stat_replication? Just
looking for the "right" way to know which host is which.
>

You may query

select pg_is_in_recovery();

This will be true in hosts which are currently in recovery mode i.e.
standby. It will be false for master.

As suggested previously you may check the wal sender process too but if you
have a cascaded setup you may find these processes on a standby which is
replicating to a cascaded standby.

> Thanks
>
> Steve
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