Hot Standby Hot Standby

[Almir Karic]

stupid question, why your idea is any better than having 3 loadbalanced
servers? 

anyway, what you are asking can be done with recursive error_pages.

On Fri, Nov 21, 2008 at 10:03:56AM +0000, Stephen Nelson-Smith wrote:
> Following on from testing yesterday, I can't see a way to do this:
> 
> * Traffic ---> backend1
> 
> * backend1 fails
> 
> * Traffic ---> backend2 (hot standby)
> 
> * backend2 fails
> 
> * Traffic ---> backend3 (2nd hot standby)
> 
> ie we cannot have a hot-standby-hot-standby.
> 
> The best I have come up with is weighting the two backup backends, so
> only a very small amount of traffic goes to one of the two live backup
> machines.  This isn't ideal - the spec I need  to meet is to have two
> tiers of failover, with the app only ever running on a single
> instance.
> 
> How can I achieve this?  Is it possible?
> 
> S.
>