[DRMAA-WG] Meeting minutes - Conference call Apr 14th

[Peter Tröger]

Participants: Roger, Daniel, Peter

> 1. Meeting secretary for this meeting?

Peter

> 2. Queue discussion (relationship to slot concept, relationship to
> machine concept)

- New slot concept is important on its own, regardless of queue  
relationship
- DRMAA cannot assign any semantic to the queue term - could be  
'waiting line' (non-SGE) or 'execution host' (SGE)
	- SGE can have one job in multiple queues
	- Practice shows that site admins sometimes describe queue semantic  
in long queue names
	- Stick with 'list of opaque queue names' approach
- From portal application view point, queueMaxSlotsAllowed is as valid  
as queue name listing
	- Implies no meaning for what a queue is, gives only maximum allowed  
value for a job template parameter
	- Daniel started to collect other possible queue monitoring  
attributes on Google Docs page
- Getting information about queue - machine relationship is only  
useful for debugging purposes, nothing for DRMAA
- Requesting a number of slots for a job in one queue has no  
implication on number of utilized machines
	- MPI vs. OpenMP case only depends on configuration aspects
- Question about relationship between user and monitoring list  
information (e.g. list of queue names)
	- Can be system view (qmon case) or user-centric view  -> which  
queues are available for me
	- Decision for user-based perspective, also based on practical  
experience in the field (Roger)
	- Demands queue ACL checks in the DRMAA implementation
	- Should be general approach for MonitoringSession interface

> 3. Parallel environment discussion (machine list availability,
> configuration name semantics)

- Configuration name proposal page looks reasonable
- Mapping execution environment conditions is clearly an  
installation / site-specific issue
- DRMAA should only provide name proposals and their meanings

> 4. Support for core file fetching

- Basic assumption that core file ends up in the working directory
- Problem: Staging is over when the JobInfo information is available
- Level of DRM system support for core file fetching is unclear

Best,
Peter.