CMS Computing Hamburg
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SR 7A / Building 7
SR 7A / Building 7
Description
Bi-weekly meeting concerning computing issues in Hamburg
Support
Minutes of the CMSHH-Computing-Meeting, March 21st 2007, SR 7A
(comments to florian.bechtel@cern.ch)
- Commissioning of new workgroup servers
- Hartmut has checked for missing software and all needed packages should be installed now. There are some instabilities with xemacs from time to time.
- There is no CMSSW installation for SL3-64bit-architectures at the moment, but Hartmut has documented in the CMSHH wiki how to enforce the build of 32bit-libraries during compilation ! TO DECIDE: Do we want to include this already in the AFS installation? Note that this problem should go away for SL4. !
- Setting up a new CMSSW project, compiling and running the code all works on the new machines
- General scheme:
- uhh-cms012-015 - login workgroup servers
- uhh-cms011 - SL4 installation for Markus to run Millipede
- uhh-cms016 - setup as 012-015
- uhh-cms017-020 ongoing
- the old fileserver (uhh-data01) is mounted on the new workgroup servers ! TO DO: export new disks to old workgroup servers (i.e. uhh-cms01-03) ! for disk space on the workgroup servers (and on the file server once it becomes available): contact cms-admin@desy.de (Hartmut, Alan, Birgit)
- There is an incompatibility of kinit between the old and new workgroup servers. So at the moment code checkout only works anonymously.
- The new file server is installed. Birgit has tried to get in contact with the responsible admin. Partition (20 TB total) : Proof 10 TB Scratch small... reserved to be decided
- Birgit will ask IT to have standard nagios monitoring for the new workgroup servers
- PROOF
- Hartmut gave a very impressive demonstration of PROOF, see his talk for details
- In the discussion, the point was raised whether Hamburg needs an additional batch system. We still need to understand the typical use-case for this (for example private Monte-Carlo production? Analysis on private ntuples? etc.). Birgit reported that DESY-IT would prefer SGE technology.
- New hardware
- Birgit has written a "BA" and sent it to Christoph who then gave it to Joachim Mnich.
- There will be 2 new prod-agents which will be reserved for official Monte-Carlo production
- Load Tests
- Yves and Florian have installed PhEDEx 2.5.1 on the new CMS VO Box and started agents in the dev instance. We are waiting for CMS-PhEDEx-Admins to send us a small test sample. Transfers in the last 24 hours can be monitored at href=http://cmsdoc.cern.ch/cms/aprom/phedex/prod/Activity::QualityPlots?graph=quality_all&entity=dest&src_filter=FZK&dest_filter=T2&no_mss=true&period=l24h&upto= We still need to understand why the transfer quality is only about 60%.
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