Re: SR/libpq - outbound interface/ipaddress binding

2010/2/23 Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>:
> While playing with SR/HS in a more complex datacenter environment I immediatly hit the need to being able to specify
theipaddress(or interface) that the backend(or libpq) uses to connect to the master. 
>
> There are a few reasons for being able to do so like:
>
> * we are now suddenly in a situation where the backend can create outbound connections on it's own so people will
haveto add firewall rules and being able to guarantee the source IP will help maintainance (otherwise stuff might break
ifyou say add an alias IP on an interface) 
> * prioritising - if you know that replication traffic is on a given IP you can actually do fancy stuff like routing
itover a different gigE line or giving it prority on a WAN connection 
> * some of those also apply to other libpq clients but those are usually not in that complex network/system
environmentsas servers are 
>
>
> comment?

Seems like this could be very useful functionality, provided it can be
done in a reasonably portable way. As long as it's a libpq connection
parameter, it'll benefit everybody else as well as the replication
stuff at no extra cost.

It's not a very broad use-case, but in that use-case I can see how it
would be very useful.

Now, are you up for actually writing it? ;)

-- Magnus HaganderMe: http://www.hagander.net/Work: http://www.redpill-linpro.com/