[SATLUG] Next month's presentation
jeremy at bioc09.v19.uthscsa.edu
Tue Aug 27 23:10:03 CDT 2002
> I agree, this would be a very interesting presentation. Personally my
> company (Global Gaming Innovations) is working with wide area
> clustering. My interest would be peaked and I *might* actually make it
> to my first SATLUG meeting.
Come out anyway ;)
> That's true that creating a cluster is
> easy, although to be honest, you DONT need MPI or PVM to do it. The
> tools are already present in TCP/IP protocol programing. Building a
> cluster doesn't have to require installing or configuring anything!!!
> However, if you wanna get into fun things like multi-threaded parrallel
> computing, you're gonna want to use the kitchen sink of distributed
> parallel computing (MPI).
This is true with multi-threaded parallel programs. But, what openMosix
does is implement this at kernel level so there is no need to reprogram
your binaries for MPI parameters. I like OpenMosix because it is kernel
level so it load balances regardless of IF the binary is compatible. Now
there are requirements as I mentioned before, but most applications WILL
balance across nodes that need the extra resources. There are tweaks you
can do and even in my experience I can't get *true* balancing (50/50), but
I can get at least 60/40 (60% on the node that started the app, 40 for the
rest of the nodes). There is more but I wanna save it for the demo ;)
> There's one major draw back in today's tech
> that is on the market. That is, try starting up your program and pull
> the plug on ANY of the nodes in the LAM, whops all gone, with no
> signal. There's ways to send heartbeats and Duke University is
> developing methods of gracefully shutting down your distributed program
> with error codes. However, this is currently a major pain in the arse.
> Also for more about wide area distributed processing check out the
> Albatras (sp?) project. It's looking pretty good (4 universities
> making up shared clusters).
With OpenMosix you only need an entry in its config file (mosix.map) to
span across networks to access resource nodes.
> Oh and if there is interest, my company is about to release its first
> beta test (will work natively in linux) of a FPS game that will use the
> distributed processing tech to create massive multiplayer online games.
> (read as 500-1000 or more quakster types fragging each other on one
> server). I'll post an anouncement incase anyone is interested in seeing
> this type of stuff work.
I am definitely interested in hearing about this. I have heard Doom3 will
P2P resources for extra bandwidth, BUT in my experience with balancing you
need a fat pipe to move the data between nodes.
jeremy at biochem.uthscsa.edu
University of Texas Health Science Center
Bioinformatics Core Facility
Phone: (210) 567-2672
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