Tier 3 architecture Doug Benjamin Duke University
Tier 3 g configuration Users Interactive node Pathena/Prun – to grid US Tier 2 Cloud The Grid User jobs Batch (Condor) NFSV 4 mounts User jobs User’s home area Atlas/common software Atlas data Bestman Storage Resource Manager (SRM) (fileserver)
Where to find details • Tier 3 configuration wiki currently at ANLhttps: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Web. Hom e
Instructions from the beginning • How to install software (kickstart file) https: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Usb. Keysetup • Given size of Tier 3 clusters – will use common user/group files pushed to all nodes in cluster • Instructions pending • Will provide LDAP instructions for bigger sites https: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Setup. LDAPserver • Collaborating with OSG on cluster management software (CMS uses Rocks for many Tier 3’s) • How to get a Grid host certificate https: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Get. Host. Certificate
Batch system / storage configuration • Condor installation/ configuration instructions • Earlier this week DB/RK in Madison Wi. Working with Condor and OSG team - Instruction after trip back next week • OSG wrote first pass of XRoot. D installation instructions https: //twiki. grid. iu. edu/bin/view/Release. Documentation/Xrootd. Stand. Alone • NFSV 4 instructions/scripts • On web this weekend (have script to configure NFS mounts already)
Storage Element installation/testing • Instructions for Bestman-Gateway SRMhttps: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Setup. SE • Through put testing and instructions http: //www. usatlas. bnl. gov/dq 2/throughput (testing graphs) https: //atlaswww. hep. anl. gov/twiki/bin/view/Tier 3 Setup/Throughput. Cleanup
Tier 3 Hypernews • Tier 3’s will be community supported • US Atlas Hypernews - HN-Tier 3 Support@bnl. gov https: //www. racf. bnl. gov/experiments/usatlas/analysis/hypernews
Conclusions • Many of the installation/configuration instructions written and online • Other instructions will be online shortly • Using scripts when possible to make life easier • Based on feedback from this meeting other services will be added • Expect Tier 3 evolution • Your help in vetting the instructions is appreciated • Writing some would be nice also
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