Re: New trigger option of pg_standby

On Fri, 2009-03-27 at 10:25 -0400, Tom Lane wrote:
> Peter Eisentraut <peter_e@gmx.net> writes:
> > Simon Riggs wrote:
> >> If we go with this, I would suggest we make *neither* the default by
> >> removing -t, and adopting two new options: something like -f == fast
> >> failover, -p == patient failover.
> 
> > -m smart|fast|immediate :-)
> 
> +1 for using a "-m something" type of syntax instead of having to try to
> pick single-letter switches that are mnemonic for the different cases.
> But -1 to those particular mode names --- I think it will invite
> confusion with pg_ctl's behavior.

The choice is between

* one parameter with the option being given as text within trigger file

* two parameters naming different types of trigger file

I don't mind which, as long as it is one of those two, unless there is a
third way to specify things so that user has control at failover time. A
single -m option would hardcode that decision ahead of time, which is
undesirable behaviour, hence the additional complexity being discussed.

-- Simon Riggs           www.2ndQuadrant.comPostgreSQL Training, Services and Support