[Beowulf] openMosix ending
Robert G. Brown
rgb at phy.duke.edu
Tue Jul 17 16:42:30 EDT 2007
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
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
> 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,
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:rgb at phy.duke.edu
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