Re: adding to existing install

Laurence Perkins wrote:
> I have an Ubuntu server running on old hardware to collect statistics
> and draw graphs.  Every once in a while the higher-ups decide they
> want an insane number of graphs drawn.  I'm looking for something that
> would let me hook in some extra processing power when I need it.  From
> what I've seen, openssi might well do it, but I'm not seeing anything
> in the documentation about adding it to an existing install.  Can
> anyone offer me any useful advice?  And has anyone made openssi work
> with ubuntu?  I can rebuild the system if I have to, but I'd really
> rather avoid it as the configuration is somewhat touchy.
Not really possible with OpenSSI.

One perhaps silly idea - if your machines are KVM ready you could
install OpenSSI in a virtual machine (i.e. make a cluster with nodes
running in KVM instances on multiple physical machines).

You could also, at some performance cost, use QEMU in the same way.

At the moment there is no OpenSSI for Ubuntu.  As Ubuntu is based on
Debian it may be possible at some point to run the Debian OpenSSI on
Ubuntu - the biggest problem is probably the difference between sysvinit
and upstart.  More news later, maybe.

(I approach a similar problem from a different direction - All the
desktops in my company (only 10 machines) are already in an OpenSSI
cluster, so I get to run any big jobs overnight when nobody's here. 
This solution only works 'cos I can tell the users to shut up when
OpenSSI crashes, as it sometimes does.)


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