[Beowulf] KVM to a compute node - ssh
mwill at penguincomputing.com
Thu Jun 3 13:47:00 EDT 2004
This is a component we put into our products, rather than a standalone
If you look at a 1U opteron system for example, you can add it for $21 in the
"additional network interface" section.
On Thursday 03 June 2004 10:32 am, Robert G. Brown wrote:
> On Thu, 3 Jun 2004, Michael Will wrote:
> > On Thursday 03 June 2004 09:19 am, Robert G. Brown wrote:
> > > On Thu, 3 Jun 2004, Guy Coates wrote:
> > > > > PCs, even "server class" motherboard PCs, alas, have never been
> > > > > designed to have a "real" serial console as video cards are viewed
> > > > > to be essential, not optional.
> > > > >
> > > > > image. This is a BETTER solution than a serial interface for this
> > > > > purpose, as serial interfaces to my experience have a real problem
> > > > > interpreting e.g. three finger salutes in all possible runtime
> > > > > states
> > > >
> > > > Ok, I admit plain serial does have its limitations on PC hardware.
> > >
> > > Ya, and WOL isn't perfect or even all that great for this as well -- it
> > > isn't really designed to overcome post boot state from what I can tell
> > > from the original AMD white paper, and so while it can power a system
> > > on from off, it isn't clear that it can reboot a hung system.
> > We solved it by putting a small serial remote control card into the boxes
> > that simulates pressing the power and reset buttons. It sits between the
> > serial port and the mainboard and sniffes for break+command on the serial
> > port without affecting its normal use. We use cyclades terminal servers
> > to be able to connect to each node so we can adjust bioses without having
> > to go to the KVM, and with help of the remote control card also are able
> > to power it up and down as we like, even if it is completely stuck.
> Is this a product or did you hack it together? Do you have a web
Michael Will, Linux Sales Engineer
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