Patrick Gartung 1 CMS 101 Mar 2007 Introduction to the User Analysis Facility (UAF) Patrick Gartung - Fermilab

Patrick Gartung 2 CMS 101 Mar 2007 What is the UAF?  The User Analysis Farm (UAF) is part of the Tier 1 facility at Fermilab.  The UAF is a farm running the Linux operating system providing interactive computing for users.  Separate interactive and batch computing: ● Pool of interactive nodes ● Network switch provides “round robin” access to 20 nodes through the alias cmsuaf.fnal.gov ● 5 direct access nodes cmswn051->cmswn055.fnal.gov ● batch farm (shared with production grid ) running condor. ● 600+ nodes ● batch slots

Patrick Gartung 3 CMS 101 Mar 2007 Benefits of using the UAF  Reference Platform.  Interactive system.  CMS software is available and maintained.  System administrators keep the system up.  Thursday morning is the slot for system maintenance and upgrades.  Fast access to mass storage, plenty of disk space.  Fast networking (GigaBit Ethernet).  Plenty of CPU to do some production projects.  Condor batch system to automate these projects  Data samples.  Basically provide all the things you “don’t” want to do or worry about yourself!

Patrick Gartung 4 CMS 101 Mar 2007 kinit cmsuaf.fnal.gov ENSTORE Configuration of User Computing as of Mar 2007: Enstore: Powderhorn STK Silo:Drives: 9 x 940B, speed 30 MB/s, Capacity: 200 GB/cartridge dCache: >600 TB read Pools (backed up to tape) >10 TB write Pools (backed up to tape, can also read from them) >100 TB resilient Pools (no tape backup, multiple copies, not deleted) /pnfs/cms/WAX /pnfs/cms/WAX/resilient > 700 registered users Gigabit Ethernet cmswn UAF /uscms/home/ /uscms_data/d1/ /uscmst1b_scratch/lpc1/

Patrick Gartung 5 CMS 101 Mar 2007 Getting Help USCMS User Computing web pages Then on the left select: Software & Computing Then on the left select: User Computing LPC Helpdesk (my primary job) Wilson Hall 11th floor crossover Computing Division Helpdesk Wilson Hall ground floor across from credit union

Patrick Gartung 6 CMS 101 Mar 2007 Obtaining a CMS account at FNAL  For onsite visitors  Apply for a Fermilab ID if you do not have one  Apply for CMS UAF account using this webform  For offsite users  Follow the directions and links on this webpage

Patrick Gartung 7 CMS 101 Mar 2007 Connecting to the UAF Get an addressless and forwardable kerberos ticket for the FNAL.GOV realm kinit -n (on SLF 3 & SLF4) kinit –A (on OSX & SL3 & SL4) Connect to UAF OpenSSH servers (also 52,52,54,55) Use if you get afs error when logging into cmsuaf.fnal.gov If you use ssh which does not support kerberos authentication, you will be presented with a Cryptocard challenge Cryptocard available from CD helpdesk for pickup or by mail For more information, including how to connect from a Windows PC see this webpage :

Patrick Gartung 8 CMS 101 Mar 2007 General Setup of runtime environment: Use “source /uscmst1/prod/sw/cms/cshrc uaf”. This sets SCRAM_ARCH=slc3_ia32_gcc323 and the path to the scramv1 command. Then you can run commands like : scramv1 project CMSSW CMSSW_1_2_3; cd CMSSW_1_2_3; eval `scramv1 runtime –csh ; scramv1 build To access sl4 releases use “setenv SCRAM_ARCH slc4_ia32_gcc345” or “export SCRAM_ARCH=slc4_ia32_gcc345”. Use “source /uscmst1/prod/sw/cms/cshrc nightly” to get debug builds built each night and of the latest prereleases. Use “source /uscmst1/prod/sw/cms/cshrc sl4” to get sl4 builds built each night.

Patrick Gartung 9 CMS 101 Mar 2007 Where to put your files Home area - with backup /uscms/home/ 2GB quota, nightly backup Data area – no backup /uscms_data/d1/ 10GB quota, no backup Scratch area /uscmst1b_scratch/lpc1/3daylifetime AFS directory /afs/fnal.gov/home/room(1,2,3)/ 500MB quota, nightly backup ~/public_html appears as