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CMS farm installation @ Mons

CMS farm installation @ Mons. Final goal : included in the GRID CMS framework To be involved in the CMS data processing scheme Starting point : follow the UCL CMS farm installation Means : install all the CMS simulation and reconstruction software

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CMS farm installation @ Mons

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  1. CMS farm installation @ Mons • Final goal : included in the GRID CMS framework • To be involved in the CMS data processing scheme • Starting point : follow the UCL CMS farm installation • Means : • install all the CMS simulation and reconstruction software • Make them available on all the computer of the farm -> NFS • Distribute the jobs in a “clever” way -> CONDOR • Store the produced events -> RAID system disk space • Near future : • Connection to the GRID -> Globus Alain Romeyer - 15/06/2004

  2. Cluster architecture Outer world OS : Redhat CERN 7.3.3 100 Mb/s cms01.umh.ac.be 193.190.171.101 Server Raid disk (2.4 TB) 10.0.0.11 Static IP 10.0.0.XXX Router 1 Gb/s … Cms02 10.0.0.12 Cms03 10.0.0.13 Computer Alain Romeyer - 15/06/2004

  3. Status Current status : 3 PCs (P4 2.4 GHz processor – 2 GB memory) -> 1 server -> 2 for job execution 01/04 : OS installation on each PC -> OK 01-02/04 : CMS software environment -> OK (CMS84 : OSCAR_2_4_6 – ORCA_7_6_1) Programs are distributed via NFS -> OK 03/04 : Job submission and management -> OK (CONDOR 6_6_2) 04-05/04 : Event production -> OK Alain Romeyer - 15/06/2004

  4. Production tests • Event production for CMS : • Pile-up events (10 000 evts - ~ 1 min / evt) -> 17 hours jobs • SUSY events (10 000 evts - ~ 6 min / evt) -> 4.5 day jobs • Mix pileup and SUSY events + digitisation (detector response) (10 000 evts - ~ 25 s / evt) -> 7 hour jobs Farm seems operational and stable over ~ 1 week • Cacti monitoring tool (http://cms01.umh.ac.be/cacti) • Works only partially… don’t know why !!! Alain Romeyer - 15/06/2004

  5. Remaining issues • CONDOR configuration / firewall • daemon wait for job submission on eth1 (local network) • But we want to submit jobs from the public network (eth0) CMS01 CONDOR daemons Public network Local network eth0 eth1 -> playing with iptables rules ? • How to send email from cms02/03 to the UMH mail server ? -> IP masquerading on cms01 (router)… Alain Romeyer - 15/06/2004

  6. Before moving to GRID… • Installation of required dependencies • Do we need particular things in terms of : • QoS • Security • …? Alain Romeyer - 15/06/2004

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