T2_CH_CSCS CMS Information

User Information

• User Information: Help and examples on how to work on the CSCS Tier-2
• Tier-2 to physics groups associations
  • Currently, T2_CH_CSCS is associated to the b-physics group, only

Administrator information for running the local site

• CMS site contact's shifter information: Daily interactive checks for our site's health
• CMS Site Log for T2_CH_CSCS
• CmsVObox
• Data sets to keep/delete table - used in querying users as to what can be deleted

External admin relevant information

• Indico space for the CMS Facility Operations Wiki / meetings
• Operational Procedures for CMS Sites from the central CMS wiki
• T2 admin guide from the central wiki
• Tier-2 Storage organization
  • Ian Fisk's slides from Computing Integration Meeting Jul 16th 2008. This defines a schema of storage classes and sizes.
  • Ian Fisk's slides from PADA Meeting of Sep 4th 2008 with Tier-2 to physics groups associations.
  • Ian Fisk's slides from CMS week of Sep 25th 2008. Contain descriptions of storage policies and group mappings.

CMS Requirements

• Batch system related requirements
  • Priority users
    • A limited number of users for every CMS physics group can take the Priority User VOMS role (role=priorityuser). These should be mapped to a group of local system users (e.g. priorityuser01, ...). These should get a higher priority than normal CMS users. Current proposal is to give the sum of the (few) priority users the same priority as the sum of the CMS analysis users. E.g. production / priorityuser / analysisuser = 0.5 / 0.25 / 0.25
    • central Twiki page indicating readiness, to be filled out by us. Also, look at talk by T. Kress at FacOps 2009-09-28
• CMS job I/O requirements
  • 2009-06-18 Ian Fisk reports on CMSSW I/O campaign in PADA meeting. Aim is to increase CPU efficiency while trying to keep I/O as low as possible.
  • 2009-03-30 Ian Fisk's Talk on specific dCache issues mentions CMS I/O bound jobs requiring 3 MB/s of data.

Interesting Talks and links on Tier-2 relevant technologies

• Three tech talks on SE technologies from the CMS offline workshop 2009-04:
  • GPFS/Storm
  • Lustre/dCache
  • Hadoop
    • Hadoop OSG site: https://twiki.grid.iu.edu/bin/view/Storage/Hadoop

old information

• Status of Summer08 Monte Carlo production
• obsolote Analysis Group page on CERN twiki

-- DerekFeichtinger - 24 Apr 2009