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Experiences of P-Grade at the White Rose Grid e-Science Centre

Experiences of P-Grade at the White Rose Grid e-Science Centre. PUCOWO ETH Zurich 10 th June 2010. Mark Hewitt Shiv Kaushal. White Rose Grid. Collaboration between Universities of Leeds, Sheffield and York Each site has HPC resources, allows access to whole WRG

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Experiences of P-Grade at the White Rose Grid e-Science Centre

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  1. Experiences of P-Grade at the White Rose Grid e-Science Centre PUCOWO ETH Zurich 10th June 2010 Mark Hewitt Shiv Kaushal

  2. White Rose Grid • Collaboration between Universities of Leeds, Sheffield and York • Each site has HPC resources, allows access to whole WRG • WRG e-Science Centre: Responsible for collaborative research and P-Grade deployment

  3. Why a portal? • Some users prefer web based access than SSH • Ease of running jobs on remote sites • One access point for all resources.

  4. Why P-Grade? • Tested alternatives, NGS Portal, Enginframe, EASA • Needed a generic job submission system, not applications based. • Free! • Well supported

  5. Installation / Configuration • P-Grade installed in VM at York • Install straight forward but did need support from developers • Cut down many features to make it easier for users / support. • Configured SGE job managers • Extensive testing carried out • INCA testing of all three sites

  6. User Feedback • Especially like the workflow editor • It does what it says on the tin! • Stable, run for many months at a time • Not easy without detailed training • Some bugs • Java integration issues meaning jobs marked as ‘incomplete’, and strict dependencies on Java versions • Not possible to inspect a job without downloading a zip file • Deletion of a workflow leaves the old name unusable • Incompatible with Ubuntu’s default Java • User interface could be made more ‘friendly’ • Some steps are confusing e.g. “set for grid”

  7. SARoNGS • SARoNGS • SARoNGS is a project supported by the UK National Grid Service • Allows a user to create a short lived proxy based on their institutional login via Shibboleth. • Integrated with P-Grade • Simple to do. Add a button on certificate page, plus JSP code to populated the certificate download form

  8. 2.9 and beyond • Some difficulties installing 2.9 • Install now separates Condor / Java etc • Condor not running stably • Lack of time due go to production level • NGS WMS now reached maturity • Hope to have integration between WMS and P-Grade • SARoNGS to handle certificates and login

  9. Questions? • Mark Hewitt • University of York (mhewitt@cs.york.ac.uk) • Shiv Kaushal • University of Leeds (s.kaushal@leeds.ac.uk) • Thanks to: • P-Grade team • Esp. Zoltan Farkas and Peter Kacsuk • Joanna Schmidt • WRG e-Science Centre Director • Aaron Turner • WRG York • Mike Griffiths • WRG Sheffield

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