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Deployment Area meeting
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Description
VRVS: Forest
Phone: +41 22 767 7000 \"LCG Deployment\"/Ian Bird
Notes from the LCG GDA meeting
2004-03-29
Agenda: http://agenda.cern.ch/age?a041378
Contact: project-lcg-gda@cern.ch
The meeting was chaired by Flavia Donno, who apologised to the remote participants for not having made available the presentation transparencies in advance, given that she was asked to replace Ian Bird at very short notice.
LCG release status (Zdenek Sekera)
The new LCG-2 software release will be made available on March 31st, as planned. Jean-Philippe Baud confirmed that the fix allowing copy and register with guid (Grid Unique IDentifier) is already available on the EIS testbed.
LCG Deployment Status (Markus Schulz)
Markus gave briefly the status of the deployment service. Alice is using the LCG sites to run their DC jobs. The Information System (IS) reports 1K jobs running or queued on various sites. A temporary problem at the FZK (Germany) site which prevented them from taking jobs is now over. Uneven job distribution across sites is under investigation.
LCG SRM Status (Jean-Philippe Baud)
Jean-Philippe received a new version of SRM and dCache last week and Maarten Litmaath tested it extensively over the week-end. Installation problems, that were observed in the past, seem to have been solved. The present installation procedure contains an automatic part and an easy step of script-based manual configuration.
Answering a question from the audience, Jean-Philippe explained that the Replica Manager (RM) supports SRM as well as classic Storage Elements (SEs), which is useful because many sites still use them. No migration procedure is foreseen from classic SEs to SRM. Users will copy their files to managed Mass Storage systems (Castor, dCache, HPSS etc) as required.
RLS Performance Issues (Dirk Duellmann)
Dirk (CERN IT DataBase group and POOL co-developer) reported on work done with Maria Girone on POOL/RLS. He described the diagnosed lack of optimisation by programmers and cumbersome query syntax by users as part of the causes for the performance limitations experienced by CMS. People still continue putting meta-data information in the filenames, despite warning that this makes database scanning very inefficient. (***ACTION***: POOL/RLS developers will give the GD/EIS section a list of user instructions for publishing.) Some of the other points in Dirk's presentation have been mentioned in the notes of the previous GDA meeting.
Experiment Issues
Joel Closier reported that different LCG User Interfaces (UI) offering the gcc 3.2.2 compiler, present a different user environment at login time. Examples:
- adc0014.cern.ch (production), built like a standard CERN RedHat Linux desktop with LCG UI.
- lxshare0219.cern.ch, the UI of the EIS testbed.
- lxdev07.cern.ch, another LCG-2UI, part of the standard LXPLUS.
Experiments required the CERN gcc compiler which is different from the EDG and LCG one, installed in a different directory and made available on all sites. Thus, users face problems with programs compiled with one compiler (LXPLUS doesn't make available to the user the EDG commands) and run against another. When all LXPLUS nodes will be equiped with the UI software, there risks to be a confusion with the compiler location. Already now the LCG Application Area and the LCG Deployment Area contain some tools in different places. (***ACTION***: Joel will register the problem in savannah and Roberto Santinelli, CERN/IT/GD/EIS will investigate).
Joel also reported problems that he experienced trying (from his adc0014.cern.ch login) to install LHCb software across sites. The operation aborted at NIKHEF and another site, one 'success' gave Exit code 1 and another Exit code 0. (***ACTION***: Joel will register the problem in savannah and will consult his LCG EIS-LHCb support person rather than report directly in the GDA meeting).
A.O.B.:
- The next meeting will take place on Monday 5 April 2004 from 14:00 to 16:00 in the CERN IT Auditorium.
- People are reminded that this meeting is agenda-driven and discussion items should be submitted to the list project-lcg-gda@cern.ch which is a self-subscription mailing list with web archiving activated.
Maria Dimou, IT/GD, Grid Infrastructure Services
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