[Beowulf] shared memory versus MPI and bootless boot

[Mark Hahn]

> If i boot a machine without harddrive, basically the machine says: "F you, 
> error! Press enter to reboot"
> 
> Ok let's start please there. What do i do after getting that message?

_before_ getting that message, look in the bios.  there should be some 
mention of net-boot and/or PXE.  assuming you have integrated net, of course.
bootable add-in NICs are still pretty hit-or-miss, I think.

> btw does that 'boot over network means i need a 16 node hub for 100 mbit and
> connect all the machines besides the quadrics network also to 100 mbit?

sure, you need some sort of ethernet.  doesn't have to be a 16pt switch
(please don't say that you actually have a hub!)