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Tier1A Status

Tier1A Status. Andrew Sansum GRIDPP 8 23 September 2003. Contents. GRID Stuff – clusters and interfaces Hardware and utilisation Software and utilities. Layout. EDG Status 1 (Steve Traylen). EDG 2.0.x deployed on production testbed since early September. Provides:

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Tier1A Status

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  1. Tier1A Status Andrew Sansum GRIDPP 8 23 September 2003

  2. Contents • GRID Stuff – clusters and interfaces • Hardware and utilisation • Software and utilities

  3. Layout

  4. EDG Status 1 (Steve Traylen) • EDG 2.0.x deployed on production testbed since early September. Provides: • EDG RGMA info catalogue:http://gppic06.gridpp.rl.ac.uk:8080/R-GMA/ • RLS for lhcb, biom, eo, wpsix, tutor and babar • EDG 2.1 deployed on dev testbed. VOMS integration work underway. May be found useful by small GRIDPP experiments (eg NA48, MICE and MINOS)

  5. EDG Status (2) • EDG 1.4 gatekeeper continues to provide gateway into main CSF production farm. Provides access for small amount of Babar and ATLAS work. Being prepared for forthcoming D0 production via SAMGrid • Along with IN2P3, CSFUI provides main UI for EDG • Many WP3 and WP5 mini testbeds • Further GRID integration into production farm via LCG – not EDG

  6. LCG Integration (M. Bly) • LCG 0 mini testbed deployed in July • LCG 0 upgraded to LCG 1 in September. Consists of: • Lcgwst regional GIIS • RB • CE, SE, UI, BDII, PROXY • Five worker nodes • Soon need to make important decisions about how much hardware to deploy into LCG – whatever experiments/EB want.

  7. LCG Experience • Mainly known issues: • Installation and configuration still difficult for non experts. • Documentation still thin in many places. • Support often very helpful but answers not always forthcoming for some problems. • Not everything works – all of the time. • Beginning to discuss internally how to interoperate with production farm.

  8. SRB Service For CMS • Considerable learning experience for Datastore team (and CMS)! • SRB MCAT for whole CMS production. Consists of enterprise class ORACLE servers and thin” MCAT ORACLE client. • SRB interface into Datastore • SRB enabled disk server to handle data imports. • SRB clients on disk servers for data moving

  9. New Hardware (March) • 80 Dual Processor P4 2.66GHz Xeon • 11 disk servers: 40TB IDE disk • 11 dual P4 servers (with PCIx), each with 2 Infortrend IFT-6300 arrays • 12 Maxtor 200GB Diamondmax Plus 9 drives per array. • Major Datastore upgrade over summer

  10. P4 Operation Problematic • Disappointing performance with gcc • Hope for 2.66P4/1.4P3=1.5 • see 1.2 - 1.3 • Can obtain more by exploiting hyper-threading but Linux CPU scheduling causes difficulties (ping pong effects) • CPU accounting now depends on number of jobs running. • Beginning to look closely at Opteron solutions.

  11. Datastore Upgrade • STK 9310 robot, 6000 slots • IBM 3590 drives being phased out (10GB 10MB/Sec) • STK 9940B drives in production (200GB 30MB/sec) • 4 IBM 610+ servers with two FC connections and Gbit networking on PCI-X • 9940 drives FC connected via 2 switches for redundancy • SCSI raid 5 disk with hot spare for 1.2Tbytes cache space

  12. STK 9310 “Powder Horn” 9940B 9940B 9940B 9940B 9940B 9940B 9940B 9940B A A A A A A A A Switch_1 1 2 3 4 Switch_2 5 6 7 8 11 12 13 14 15 11 12 13 14 15 RS6000 fsc0 fsc1 fsc0 RS6000 fsc1 fsc0 RS6000 fsc1 fsc0 RS6000 fsc1 rmt1 rmt5-8 rmt2 rmt5-8 rmt3 rmt5-8 rmt4 rmt5-8 1.2TB 1.2TB 1.2TB 1.2TB Gbit network

  13. Operating Systems • Redhat 6.2 finally closed in August • Redhat 7.2 remains in production for Babar. Will migrate all batch workers to Redhat 7.3 shortly. • Redhat 7.3 service now main workhorse for LHC experiments. • Need to start looking at Redhat 9/10 • Need to deploy Redhat Advanced Server 

  14. Next Procurement • Based on experiments expected demand profile (as best they can estimate). • Exact numbers still being finalised, but about: • 250 dual processor CPU nodes • 70TB available disk • 100TB tape

  15. CPU Requirements (KSI2K)

  16. New Helpdesk • Need to deploy new helpdesk (had Remedy). Wanted: • Web based. • Free open source. • Multiple queues and personalities. • Looked at Bugzilla, OTRS and Requestracker. • Finally selected request tracker. • http://helpdesk.gridpp.rl.ac.uk/. • Available for other Tier 2 sites and other GRIDPP projects if needed.

  17. YUMIT: RPM Monitoring • Many nodes on the farm. Need to make sure RPMs are up to date. • Wanted light-weight solution until full fabric management tools are deployed. • Package written by Steve Traylen: • Yum installed on hosts • Nightly comparison with YUM database uploaded to MYSQL server. • Simple web based display utility in perl

  18. Exception Monitoring: Nagios • Already have an exception handling system (CERN’s SURE coupled with the commercial Automate). • Looking at alternatives – no firm plans yet but currently looking at NAGIOS:http://www.nagios.org/

  19. Summary: Outstanding Issues • Many new developments and new services deployed this year. • We have to run many distinct services. For example, FERMI Linux, RH 6.2/7.2/7.3, EDG testbeds, LCG, CMS DC03, SRB etc. • Waiting to hear when the experiments want LCG in volume. • The Pentium 4 processor is performing poorly. • Redhat’s changing policy is a major concern

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