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

2. 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 ● 1000+ batch slots

3. 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!

4. Patrick Gartung 4 CMS 101 Mar 2007 kinit –A @FNAL.GOV ssh @ 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/

5. Patrick Gartung 5 CMS 101 Mar 2007 Getting Help USCMS User Computing web pages http://www.uscms.org/ Then on the left select: Software & Computing Then on the left select: User Computing LPC Helpdesk (my primary job) Wilson Hall 11th floor crossover gartung@fnal.gov 630-840-3832 Computing Division Helpdesk Wilson Hall ground floor across from credit union http://csdserver1.fnal.gov/HelpDesk/cd/ helpdesk@fnal.gov 630-840-2345

6. 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 http://computing.fnal.gov/cgi-bin/remedy/CMS.pl  For offsite users  Follow the directions and links on this webpage http://www.uscms.org/SoftwareComputing/UserComputing/GetAccountFermilab.html

7. 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 –f @FNAL.GOV (on SLF 3 & SLF4) kinit –A –f @FNAL.GOV (on OSX & SL3 & SL4) Connect to UAF OpenSSH servers ssh @cmsuaf.fnal.gov ssh @cmswn051.fnal.gov (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 : http://www.uscms.org/SoftwareComputing/UserComputing/ConnectUAF.html

8. 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.

9. 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 http://home.fnal.gov/