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RAL Site Report

RAL Site Report. John Gordon IT Department, CLRC/RAL HEPiX Meeting, JLAB, October 2000. Outline. NT Farm Linux Farm and servers Data Storage Networking Other Facilities G***. NT Farm. System LSF Batch CPUs: 18 (450MHz) + 9 (200MHz) MS Terminal Server front-end - dual 450MHz

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RAL Site Report

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  1. RAL Site Report John Gordon IT Department, CLRC/RAL HEPiX Meeting, JLAB, October 2000

  2. Outline • NT Farm • Linux Farm and servers • Data Storage • Networking • Other Facilities • G*** EU DataGrid

  3. NT Farm • System • LSF Batch CPUs: 18 (450MHz) + 9 (200MHz) • MS Terminal Server front-end - dual 450MHz • Use - LHCb Simulation • Event generation & reconstruction • 500k + assorted events already generated • Feb 2001 targets: • Generation - 250k B-Bbar inclusive + 250k minimum-bias • Reconstruction with min-bias event overlay • Future LHCb work • GRID/Globus emphasis • use Linux facilities at CERN, RAL (CSF) + others EU DataGrid

  4. Linux • Production Farm 60 dual 450 and 600MHz • add another 40 duals before end of 2000 (>2x) • PBS • Kickstart installation • autorpm • Hardware health monitoring • No network boot • disk and memory an issue • no racked systems - boxes of shelves EU DataGrid

  5. Level of Operating System • All RH6.1 • but BaBar want RH6.2 • and CDF want FNAL Linux • No problem yet but creates more work EU DataGrid

  6. Kickstart • very good for installation • but results in many kickstart files • maintenance problem • need a configuration tool • remembers changes and produces kickstart file • applies new changes to multiple kickstart files. EU DataGrid

  7. Memory & Disk Allocation • Memory (256MB/dual) • Starting to get jobs that use more than 50% of this. • Local Disk (10GB and 20GB scratch space) • Some jobs starting to need >5GB • Both of these are easily solved by new machines • but we don’t scrap or upgrade the old machines • Need a batch environment that matches jobs to capability of machines - PBS? EU DataGrid

  8. Data Storage • Currently IBM 3590 tapes in 3494 • Looking at capacity increase • for new experiments (BaBar, CDF, SNO) • for LHC and Datagrid • Have considered IBM, STK, and ADIC • No conclusions yet EU DataGrid

  9. Networking • WAN - SuperJANET 4 - 2Gb backbone1Q2001 • 10Gb in 2003 or sooner • 622Mb to RAL • LAN - upgrade from FDDI to support above • grid of interconnected switches with multiple Gb • Gb ethernet for servers and switches. • Fibre and copper EU DataGrid

  10. Special Services • BaBar • 6TB of disk at RAL + more at 9 UK univs(1999) • 4xSun420R (16 cpus) at RAL, farms at Univs(2000) • CDF • Disk (RAL & univs) and farms at universities • Ian McArthur’s talk Friday EU DataGrid

  11. Grid Issues • Certification • UK CA for HEP • Datastore Access • Access to Atlas Datastore via Globus tools • Network Performance • QoS and performance • Metadata - resources & data • projects with BaBar and CDF and others • and working with many other areas of science EU DataGrid

  12. UK HEP Grid • 4 or 5 sites will define themselves as a Grid today • authentication via common CA at RAL • GIIS - information service storing resource metadata from all sites • user account database for easy registration and group authorisation • Form basis of UK testbed for Datagrid EU DataGrid

  13. Finally • A year ago the problem seemed to be managing large numbers of roughly homogenous systems for cpu and storage • tools like kickstart seemed to offer hope • In the last six months demand has risen for numbers of administratively distinct systems • Datagrid testbed, grid development systems, LDAP servers, data portals, user database servers, network monitors, QoS testbeds • They may all have Linux in common but they have many different software and management requirements • All increasing demands on staff EU DataGrid

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