On Tue, 17 Jul 2007, Tony Travis wrote:
Do you really think that Condor is an alternative to openMosix?
I don't know much about Condor, but I thought is was a DRM (Distributed
Resource Manager) like SGE. Is it more than that?
I don't know for sure how functional it is as a OM alternative in
reality, but according to its (copious!) documentation, it should be
pretty good. It basically appears to be a mix of scheduler, DRM, and
migration/checkpointing tool, with the latter fairly recent. For an
application to migrate, apparently you have to link it to a
condor-supplied checkpointing library (but little else). I'm guessing
that this library "wraps" all the relevant systems calls so that they
can be sent a signal, save their state information, and encapsulate into
a migration package that actually moves (much as doubtless happens with
Mosix, but in userspace instead of kernel space, which is actually
good).
Now that Condor has a better license (basically an open source license,
although their primary distribution site still has a lot of nonsense on
it) I think it is worth giving a try. Rumor has it that a lot of groups
running grid-like computers favor it for resource control etc. This is
indeed the EP application crowd.
I keep planning to try it myself one day soon, but I'm pretty busy with
ongoing projects and just don't have time. There is a condor VM you can
download for free from VWware -- that and the player might let you
experiment some with minimal personal time lost building software an so
on.
rgb
The great thing about openMosix is that most 'ordinary' programs migrate.
I've thought about using openSSI previously: What's your opinion about that
for 'embarrassingly' parallel computation?
Best wishes,
Tony.
--
Robert G. Brown http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567 Fax: 919-660-2525 email:[EMAIL PROTECTED]
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