Re: Hot Standby (v9d)

On Tue, 2009-02-03 at 08:40 -0500, Andrew Dunstan wrote:
> 
> Hannu Krosing wrote:
> > Actually we came up with a solution to this - use filesystem level
> > snapshots (like LVM2+XFS or ZFS), and redirect backends with
> > long-running queries to use fs snapshot mounted to a different
> > mountpoint.
> >
> > I don't think Simon has yet put full support for it in code, but it is
> > clearly _the_ solution for those who want to eat the cake and have it
> > too.

> How does that work if you're using mutiple file systems via tablespaces 
> (e.g. indexes in a different TS)?

It's a great idea and easy to do, but I can't do everything in one go.

The main reasons not to are multiple file system difficulties and lack
of a mainstream Linux solution, and more simply lack of time and test
resources.

So not now, maybe later.

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