[OSM-dev] 0.6 move and downtime (re-scheduled)

[Matt Amos]

On Fri, Mar 13, 2009 at 8:34 AM, Florian Lohoff <flo at rfc822.org> wrote:
> So it is sensible to make it mirroring and it might even be a benefit to
> do an 1 -> N mirroring.
>
> Rule of thumb:
>
>        More concurrent readers -> More spindles

this is why we have ROMA/TRAPI/etc... they're able to satisy the most
common read requests. as stefan said, we're scaling out. with the
added advantage that some of them aren't hosted locally and are able
to stay up even if there are problems with the main site's network or
power.

and, as grant said, scaling out on the master DB is something that
we're going to be very cautious about for the moment.

there's another rule of thumb though: more spindles -> more failures ;-)

cheers,

matt