[ILUG] single system image

[j michaelson]

howya,

i've been looking at the openssi website...
http://openssi.org/cgi-bin/view?page=openssi.html
...and i'm not really sure if i understand what they're on about. i've
looked at the faq in the wiki...
http://wiki.openssi.org/go/FAQ
... and it tells me...

"At the most general level, the philosophy of SSI clustering is that
the cluster looks like one very big machine, with applications and
management working like they do on a single machine. SSI clusters
usually have one root file system, so that the system operates in a
cohesive working enviornment."

i'm under the impression that normal clusters have a linux kernel
running on each processor and they all work together to get the work
done. am i right in assuming that an ssi gets all the processors
running under one kernel?

if so what are the advantages of an ssi over a multi-image cluster?

thanks.
john m.