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UCL HEP Computing Status

HEPSYSMAN, RAL, 2005-04-27. UCL HEP Computing Status. Computers. Desktop PCs: ~50, from 733 MHz to 3.2 GHz Various laptops, inc. a few iBooks Group batch farm: 10 dual 2.4 GHz Dell rackmount CDF batch farm: 10 dual 2.4 GHz Dell rackmount ATLAS trigger testbed: 6 rackmount machines

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UCL HEP Computing Status

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  1. HEPSYSMAN, RAL, 2005-04-27 UCL HEP Computing Status

  2. Computers • Desktop PCs: ~50, from 733 MHz to 3.2 GHz • Various laptops, inc. a few iBooks • Group batch farm: 10 dual 2.4 GHz Dell rackmount • CDF batch farm: 10 dual 2.4 GHz Dell rackmount • ATLAS trigger testbed: 6 rackmount machines • Mail and web servers • LCG front-end nodes (CE, SE, MON) • Windows Terminal Server • Various dedicated and development machines

  3. Operating Systems • Desktops, farms, servers almost all SLC3 • recently completed changeover from RH7.3 • Windows 2000 Terminal Server • some problems with SAMBA • Windows machines for AutoCAD, hardware control • Laptops a mix of Linux, Windows, OSX

  4. LCG Front-End Machines • Dedicated service nodes: CE, SE, MON • Jobs go to HEP batch farm (normally) • Support for separate CE and batch server • not provided as part of standard LCG • relies on recipes from third parties • is getting easier • well documented for LCG 2.4.0 by Steve Traylen

  5. Central Computing Cluster • UCL SRIF-funded facility • 96 dual 2.8 GHz P4 nodes • Half dedicated to LCG • Other half uses Sun Grid Engine (non-HEP use) • Managed by Information Systems • Hope to integrate HEP and non-HEP parts • use SGE info provider from LeSC • but need to change again for gLite?

  6. Storage • User file server with ~300 GB • One 1.2 TB IDE RAID for data • One 1.2 TB IDE RAID for backup • One 3.2 TB RAID for data/backup • Various RAIDS bought by MINOS and CDF • Tape drive for backup

  7. File backup • Up to now: • backup selected areas to disk (tar) • secondary backup to tape • Problem: • tape solution expensive • need to spend more money to use with SLC • Solution: • RLBackup • Currently keeping old disk backup + RLBackup

  8. Changes • Bob Cranfield retiring later this year • Ben Waugh to be group “computing coordinator” • Gianfranco Sciacca started recently • Machine room moving to new building (early 2006?) • Moving behind campus firewall

  9. Issues • Desktops vs laptops • Management of laptops • OS choice • support • updates • Remote administration of servers and farms • Management and support using fractions of people's time

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