Richard June wrote:
>
> W Bauske wrote:
> >
> > Richard June wrote:
> > >
> > > Maurice Hilarius wrote:
> > > >
> > > > With regards to your message at 07:39 PM 11/17/00, Mike Tibor. Where you
> > > > stated:
> > > > >I've never heard anything related to clusters and single board computers,
> > > > >but on the surface it seems like something like this might be pretty good
> > > > >in building a cluster:
> > > > >
> > > > >http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=499466745
> > > > >
> > > > >Those of you who've done clusters, what do you think?
> > > > Expensive bus, weird cards, strange power.
> > > > Expensive to implement.
> > > >
> > > Maybe so, but it's convienient to have 10 or so PCI slots in a machine.
> > > and PicMG with a backplane is the only way I've seen that done.
> > >
> >
> > Pretty much all the SBC stuff I've seen is not cost effective
> > compared to commodity parts. If you need more slots, buy two
> > standard systems and network them. What are you doing that
> > requires lots of slots that multiple systems wouldn't solve?
> > Just curious.
> Routers.
> Where I work we build routers, a single system with 10 slots is easier
> to deal with then two routers networked, plus you don't have to use that
> bus bandwidth.
>
OK. I see that. But don't routers need other things like
hot swap slots for cards and failover/redundancy, etc.?
They're more complicated than a node for a cluster needs
to be.
Some cards have built-in bridges to allow more effective
slots too, like those 4 way tulip cards or multi-channel
SCSI cards so it's actually using single cards that makes
the large number of slots preferable.
Now, if there are backplanes that allow, say 8 dual cpu
SBC's, suitable for a 4U cabinet, that might make an
interesting node for building clusters.
Wes
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