lmb@suse.de 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.
Jeff
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This archive was generated by hypermail 2b29 : Tue May 07 2002 - 22:00:28 EST