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Re: [Condor-users] Condor-G Matchmaking
- Date: Thu, 8 Nov 2007 12:06:00 -0000
- From: "Smith, Ian" <I.C.Smith@xxxxxxxxxxxxxxx>
- Subject: Re: [Condor-users] Condor-G Matchmaking
> -----Original Message-----
> From: condor-users-bounces@xxxxxxxxxxx [mailto:condor-users-
> bounces@xxxxxxxxxxx] On Behalf Of Kewley, J (John)
> Sent: 08 November 2007 11:04
> To: Condor-Users Mail List
> Subject: [Condor-users] Condor-G Matchmaking
> I am doing some work with Condor-G and am trying to find out how to
> submit a job that can be matched by more than one globus resource.
> I understand that this was done using
> Universe = globus
> Globusscheduler = $$(GatekeeperUrl)
> in the past.
> What is the syntax for this when using the newer
> Universe = grid
> Grid_resource = gt2 globus_resource/jobmanager
I imagine it would be
Grid_resource = gt2 $$(GatekeeperUrl)
for compatibility with with the old version.
> Also, what needs to be setup on the globus resources to enable the
You need to advertise an attribute e.g. Name (fully qualified host name)
for each resource and use that for matchmaking in the requirements spec e.g.
requirements = ( TARGET.gatekeeper_url =!= UNDEFINED ) && ( Name == "host.domain" ) )
You also need to advertise GatekeeperUrl as a machine classad corresponding to
the resource e.g. my.host.domain/jobmanager-condorg. When the scheduler makes a match
it will subsititue the value in the $$(GatekeeperUrl) macro so you get the right
jobmanager. If you advertise some dynamic info such as the number of free nodes you
can perform more sophisticated matchmaking e.g.
requirements = ( TARGET.gatekeeper_url =!= UNDEFINED ) && \
( ( ( Name == "host.domain" ) && ( FreeNodes >= 4 ) ) || \
( ( Name == "otherhost.domain" ) && ( FreeNodes >= 8 ) ) )
( run the job on host.domain if there are at least four free nodes or otherhost.domain
if there are at least eight ).
You could use condor_advertise on each resource to send the classads to the central manager
( could be security/firewall issues tho' ) or have the central manager "pull" the info and
use condor_advertise locally to publish the classads (may be safer).
BTW the old syntax still works fine for us on 6.8.4
Dr Ian C. Smith
University of Liverpool
Computing Services Department