Re: hardware performance and some more

On Fri, 2003-07-25 at 11:13, Josh Berkus wrote:
> Folks,
>
> > Since PG doesn't have active-active clustering, that's out, but since
> > the database will be very static, why not have, say 8 machines, each
> > with it's own copy of the database?  (Since there are so few updates,
> > you feed the updates to a litle Perl app that then makes the changes
> > on each machine.)  (A round-robin load balancer would do the trick
> > in utilizing them all.)
>
> Another approach I've seen work is to have several servers connect to one SAN
> or NAS where the data lives.  Only one server is enabled to handle "write"
> requests; all the rest are read-only.  This does mean having dispacting
> middleware that parcels out requests among the servers, but works very well
> for the java-based company that's using it.

Wouldn't the cache on the read-only databases get out of sync with
the true on-disk data?

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| Ron Johnson, Jr.        Home: ron.l.johnson@cox.net             |
| Jefferson, LA  USA                                              |
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