becker at scyld.com
Fri Jan 3 10:42:21 PST 2003
On Fri, 3 Jan 2003, Randall Jouett wrote:
> Newbie alert, although I have ready the FAQ, visited a couple
> of the project sites listed on beowulf.org, and even read a
> HOWTO or 3 :^). Being a software engineer, I'll just say that
> I'm way too familiar with RTFM and google searches :^).
> Basically, I'm looking for the following info:
> * Is there a beowulf setup out that that is used to
> gernerate ray-traced graphics? If so, does anyone
> have a links to sites that in-depth info?
Various ports of POV-Ray are available for PVM and MPI, with a very wide
range of quality and performance.
We distribute a version of POV-Ray specifically ported for our cluster
system and BeoMPI. Our POV-ray port is interesting because
It transparently uses all available cluster nodes, and works even if
that number is '0'.
It does all of the serial setup and run-time I/O on the front end
machine (technically, the MPI rank 0 node). This minimizes
overall work and keeps the POV-Ray call-out semantics unchanged
It does the rendering only on compute nodes (except for the N=0 case).
It complets the rendering even with crashed or slow nodes.
> * Is there a beowulf setup out there setup specifically
> for random-number generation, with its main focus on
> generating "truly random" numbers, if you can say that
> synchronus, clock-based computers are capable of generating
> truly random numbers :^). If so, has a cluser of this type been
> used in encryption and decryption purposes.
This is trivial. Once you get a good a serial pseudo-random number
generator, you can use a cluster to generate more.
> * Is anyone working on beowulf clustering based on trusted-host
> computing? That is, instead of having a local cluster of
> words, this would be a setup much like the SETI screen blanker, yet
This wouldn't be a Beowulf cluster. (It's a stretch to call it a
cluster at all.)
Cycle scavenging is different concept, and it only to a tiny percentage
(People have heated discussions about cluster I/O performance and
communication latency. With cycle-scavenging, these are orders of
Donald Becker becker at scyld.com
Scyld Computing Corporation http://www.scyld.com
410 Severn Ave. Suite 210 Scyld Beowulf cluster system
Annapolis MD 21403 410-990-9993
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