How broadly applicable is it? OGE supports it, and I think LSF does as well. What about Condor and Torque/PBS? Daniel On 08/23/10 07:12 AM, Mariusz Mamoński wrote:
Hi,
In some fault-tollerant at the DRM-level scenarios job must be marked as "rerunnable". Do we want to add this attribute to the DRMAAv2 JobTemplate?
Cheers,
On 23 August 2010 15:42, Daniel Templeton<daniel.templeton@oracle.com> wrote:
I have a customer who has the resubmission of failed jobs in a greater workflow as a critical requirement. That's not actually something that OGE itself supports, so I'm all for having it in DRMAA to plug the hole.
Daniel
On 08/23/10 02:50 AM, Peter Tröger wrote:
We already have some understanding of persistency, so the implementation effort is manageable. I am more concerned about a clear separation of live monitoring information and original submission data. For the latter, I saw no use case so far ...
Best, Peter.
Am 29.07.2010 um 11:02 schrieb Andre Merzky:
Our use case for having access to the original complete job template is that the user can easily resubmit the same job - just changing for example some command line parameter, but leaving the remainder fixed. In SAGA this would look like:
saga::job::service js ("drmaa://torque.remote.net/"); saga::job::job j1 = js.get_job (jobid); // std::string saga::job::description jd = j1.get_description ();
jd.set_attributes ("Arguments", new_args); // std::vector<std::string>
saga::job::job j2 = js.create_job (jd);
I understand that the backend may no be able to keep the original job template - in that case, a 'DoesNoExist' exception on 'get_description()' would be appropriate, IMHO. If the DRMAA implementation can cache that description somewhere, fine :-)
My $0.02, Andre.
PS: saga::job::description == drmaa::job::template
Quoting [Peter Tr?ger] (Jul 29 2010):
From: Peter Tröger<peter@troeger.eu> Date: Thu, 29 Jul 2010 10:07:23 +0200 To: Mariusz Mamo??ski<mamonski@man.poznan.pl>, drmaa-wg@ogf.org Subject: Re: [DRMAA-WG] Monitoring JobTemplate attributes for running jobs
Am 28.07.2010 um 23:42 schrieb Mariusz Mamo??ski:
Hi,
2010/7/28 Peter Tröger<peter@troeger.eu>: > Hi, > Agenda item #8 was not discussed in the call today, but it is the burning > issue for me at the moment. Please have a look in the "Attributes in > JobInfo" tab: > http://spreadsheets.google.com/ccc?key=0AqyvnBscJNqxcnJBSUs5dXRrU29EUVhGOGth... > Currently, we allow to access the original JobTemplate from a JobInfo > object. The idea was to get, beside the job monitoring information, also the > information about what was demanded at submission time. > While doing the Condor mapping, I figured out that most of the JobTemplate > attributes are also monitorable for a running job. This includes things such > as executable name and working directory. Normally they should be the same > as in the JobTemplate, but Condor and SGE (at least) have this magic job > wrapper stuff, were the admin can automatically and silently reconfigure / > reinterprete everything in a JobTemplate. This might lead to the situation > were the user asks for A, and silently gets B. > The question: Should we drop the support for getting the JobTemplate as part > of JobInfo, because the information is useless ? Instead, we could add some > (or maybe most) of the JobTemplate attributes as true dynamic monitoring > information to JobInfo. in my opinion repeating almost all attributes in this case brings additional redundancy in the DRMAA API (another reason may be performance - the JobTemplate attribute are more likely immutable). Why not simply request expected behavior in the spec? e.g.: a) the JobTemplate being part of the JobInfo struct is a reference to the JobTemplate used for submission (for jobs submitted outside the session it MUST be NULL) b) the JobTemplate reflects actual attributes of a job (without obligation that all attributes must be available - e.g. in Torque the actually executed command is hidden in script)
Th interesting thing is that we already started to do this replication, for example: JobTemplate::candidateMachines vs. JobInfo::allocatedMachines. I still vote for finishing this replication, and remove the JT reference from JobInfo as compensation. I also have a problem with fetching live data from a structure called "template".
You example from Torque underlines my argumentation - we should choose a monitorable sub set of JobTemplate and add it to the JobInfo structure, instead of linking the JobTemplate directly.
Any other opinions ?
Peter. -- Nothing is ever easy.
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