Re: [uml-devel] Re: UML is now self-hosting!

From: Jeff Dike (
Date: Mon May 06 2002 - 15:55:52 EST said:
> but spreading an instance across multiple nodes is nowhere as simple
> as it seems;

It is if you want to be sufficiently stupid about it :-)

> where do you keep OS data,

It gets faulted from host to host as needed.

> IO access,

This scheme (and any clustering scheme, I think) would need back channels
for one node to access the devices of another

> scheduling decisions,

This machine thinks it's a normal SMP box, so scheduling happens as normal

> inter-node communication in the first place, how to deal
> with node failure etc...

Maybe I'm not familiar enough with the clustering world, but I was under the
impression that with a normal SSI cluster, the nodes are like CPUs in an
SMP box - if one fails, the whole thing dies. In other words, that SSI
clustering and HA clustering are pretty disjoint.


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