Re: [Condor-users] Grid with SMP hosts having limited custom hardware

[Matthew Farrellee <matt@xxxxxxxxxx>]

Eric Stadtherr wrote:
> Hi,
> 
> We are building a Condor-managed grid comprised of a number of
> eight-core servers. Some of these servers have a pair of custom hardware
> inputs that are utilized by some of the processing jobs. We'd like the
> Condor scheduler to be able to allocate jobs to slots in a way that
> doesn't oversubscribe the hardware inputs.
> 
> We've looked at some possible solutions but none seem to work:
> 
>      1. The ConcurrencyLimit capability appears to be a grid-wide limit,
>         and not something enforced per-host
>      2. We can't dedicate slots to the hardware inputs, since some jobs
>         make use of both inputs (and would naturally only occupy one
>         slot)
>      3. The SMP-specific shared resource limits seem to only address
>         memory and disk constraints
>      4. The "START" expression does not have access to job information
>         from other slots on the same host
> 
> 
> Is there a way to make this work?
> 
> Thanks!

(4) isn't true. A slot can make decisions based on the state of its siblings.
 
http://condor-wiki.cs.wisc.edu/index.cgi/wiki?p=HowToAllowSomeJobs

Best,


matt