Re: Bug#541239: ITP: GT.M -- Database Engine withExtremeScalability and Robustness
On Thu, Aug 13, 2009 at 05:13:24PM -0400, K.S. Bhaskar wrote:
> > > All of the business logic executes on an originating primary
> > > instance. Updates are streamed from this instance to up to sixteen
> > > secondary instances (there is presently a 20000 kilometer distance
> > > limit).
> >Huh ? How is this enforced ? Measuring wire lag ?
> [KSB] GT.M only needs a TCP/IP connection for streaming.
> Since the circumference of the earth is 40000 kilometers, you cannot
> get more than 20000 kilometers between systems, unless you construct
> a data center in space - in which case the construction costs would
> be astronomical! 8-)
You certainly got me there :-)
All this sounds like mature multi-master replication with
built-in failover. Now, before some suggests MySQL - I said
mature. AFAICT this indeed distinguishes GT.M from the FLOSS
databases that I know.
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