[DRMAA-WG] Monitoring JobTemplate attributes for running jobs

[Mariusz Mamoński]

Hi,

2010/7/28 Peter Tröger <peter at 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=0AqyvnBscJNqxcnJBSUs5dXRrU29EUVhGOGthc1lDTFE
> 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)

> Best,
> Peter.
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Cheers,
-- 
Mariusz