[Bioclusters] openmosix cluster again

[Joseph Landman]

Hi Hong:

   Openmosix will not migrate pthreaded jobs.  Postgres and the web 
interfaces (apache based) are all pthreaded.

   What open mosix is as far as bio-clusters are concerned, is a tool to 
do a "semi-automatic" load balance.  Jobs which meet specific criteria 
can be migrated to less busy nodes.  For this to make sense, you would 
need a) the jobs to require long running times (as compared to potential 
migration time), b) sufficiently low IO and other resource utilization 
such that the migration will not generate hot-spots (resource 
contention, such as network bandwidth for accessing a file over NFS).

   It is good for some types of jobs, though in a shared nothing 
environment (cluster) with limited network bandwidth and relatively high 
latencies, its isn't necessarily better than the queuing systems.

Joe

Hong Zhang wrote:

> Dear all,
> 
> Thanks for all your valuable input.
> 
> After comparation, I think SGE is more promising than openmosix for our 
> project. But now I am concerning if anyone has successfully experience to 
> apply openmosix to bio web tools other than blast. We have bunch of other 
> tools with database(postgresql) and web interfaces(python/perl/html) 
> besides blast. I just wonder whether openmosix will work well for them.
> 
> Thanks
> 

-- 

Joseph Landman, Ph.D
Scalable Informatics LLC,
email: landman@scalableinformatics.com
web  : http://scalableinformatics.com
phone: +1 734 612 4615