ATLAS GridKa T1/T2 Status
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1 ATLAS GridKa T1/T2 Status GridKa TAB, FZK, 19 Oct 2007 München GridKa T1/T2 status Production and data management operations Computing team & cloud organization T1/T2 meeting summary Site monitoring/gangarobot Tier-3/NAF TAB, FZK, 19 Oct 07 1
2 GridKa Tier-1/Tier-2 overview 6 Tier-2 for ATLAS-GridKa (>=11 Centres) in D, PL, CZ, CH, A Resources: un-official best guess Oct 07 Site CPU(kSI2k) ( '08 ) DISK(TB) ( '08 ) WLCG cert Prod DDM ops GridKa-T X X X Desy-ZN/HH (+Gött?) X X X Wup X X X Freiburg X X LMU X X X MPI X (X) CH/CSCS X X X CZ/Prague ? ? X X X PL/CYF Krakow X X X A/Innsbruck/Wien 100? 10? X X Tier-2 mostly in operation and used for ATLAS prod and DDM ops German T2 Funding by HGF-Alliance until 2012, addtl. resources from 'D-Grid Sonderinvestitionen' in 2007 Massive jump resources > 2008 TAB, FZK, 19 Oct 07 2
3 Production in GridKa cloud Walltime Sites Finished Failed Eff DE CZ PL CSCS Jobs Sites Finished Failed Eff DE CZ PL CSCS TAB, FZK, 19 Oct 07 3
4 Distributed data management in ATLAS TAB, FZK, 19 Oct 07 4
5 Distributed data management in GridKa cloud Continuous MC-data replication in GridKa cloud: TAB, FZK, 19 Oct 07 5
6 Distributed data management dataset monitoring TAB, FZK, 19 Oct 07 6
7 DDM -- 1 st real ATLAS data to T1s (M4): Aug22 Sep1 Weitere Cosmic runs bis LHC startup Re-prozessieren an Tier-2s Kalibration/Analyse an dedizierten Tier-2 TAB, FZK, 19 Oct 07 7
8 GridKa cloud computing team organization of main tasks - MC production team: participate in ATLAS prod on EGEE resources J. Kennedy (M), M. Schroers (W), K. Reeves (W), M. Jahoda(CZ), J. Guenther Distributed data management: data replication, clean-up and integrity checks C. Serfon (M), K. Leffhalm (Desy), A. Olszewski (PL), J. Chudoba (CZ) GridKa ATLAS technical contact: help sort out T1 problems, provide direct link to T1 admins D. Meder (W) (bis Juli), S. Nderitu (BN) (seit Mai) Cloud coordination knowledgeable in all fields & active in ATLAS Computing meetings John Kennedy (M) Monthly phone meetings + Mailing list + Wiki TAB, FZK, 19 Oct 07 8
9 Manpower Status Substantial Improvement in last 6 months: GridKa ATLAS contact, FR & MPPM support persons Still missing manpower for central tasks: DDM, Production, User support, Hard / impossible to find people with solid Grid-computing background mostly new person-power with professional experience from noncomputing fields extended start-up phase ATLAS GridKa cloud organization and distribution of tasks in progress TAB, FZK, 19 Oct 07 9
10 ATLAS T1/T2 meeting - yesterday ~15 people from 8 sites: Site&problem reports, common operations, discussions Issues Site usage in ATLAS production more direct involvement in central production data management & distribution: big trouble with incomplete datasets : data analysis mess and huge manual effort to accomplish completion ATLAS wide issue, GridKa cloud ~best for completion monitoring, integrity checks,... garbage pile-up in grey zone between DDM, LFC, FTS/SRM, dcache more manpower and refined distribution of tasks data distribution policies & coordination User support within GridKa cloud: Wiki: Hypernews: TAB, FZK, 19 Oct 07 10
11 ATLAS site availability monitoring not yet standard suit of ATLAS SAM tests (cf CMS/LHCb) under development/discussion indirect monitoring via production system... recently started GangaRobot: site functionality for ATLAS distributed analysis complementary requirements wrt production direct access to data on close SE (dcap, xrootd, rfiod) compile&link user-code on Wns 1 st prototype implemented to test availabilty/functionality of EGEE sites TAB, FZK, 19 Oct 07 11
12 TAB, FZK, 19 Oct 07 12
13 Tier-3 for ATLAS and User Support ATLAS-D internal meeting in Bonn last May ATLAS Computing Model, GridKa cloud, Distributed analysis needs, Tier-3 options plans/status of ATLAS-D groups Tier-3 Grid Installations Workshop in Wuppertal (Juli 07) ca 20 participants BN, DD, DO, GÖ, MZ, SI glite/dcache installation and configuration, networking requirements,... ATLAS software Installation,... TAB, FZK, 19 Oct 07 13
14 Helmholtz Alliance-NAF Setup Requirements draft prepared : interactive login & storage space AOD & ntuple (batch-) analysis Proof/ntuple (interactive-) analysis dedicated RAWD/ESD samples for calibration & development TAG database Discussion/feedback w/ Desy in progress Further iterations needed: role of Proof for ATLAS analysis startup scenarios... TAB, FZK, 19 Oct 07 14
15 Issues for GridKa Mostly smooth running of production decent performance of dcache disk pools production, data replication, T0 tests,... but no systematic longer-term performance/crash test Some hickups/failures for other services: LFC, RB, BDII,.. Need for further systematic tests of FTS configuration for individual T2s and coordinated effort to debug transfer failures to T2s Biggest current worry is availability and performance of tape system: mass staging input rate <<10 MB/s lack of monitoring & transparency admittedly we've used it mainly write-only so far TAB, FZK, 19 Oct 07 15
16 Conclusions Manpower for Computing Team substantially improved but still critical gaps to fill Organization & distribution of tasks within GridKa cloud in progress need more people for central services Massive CPU&Storage Increase next year at T1 & T2s potentially scaling problems in various areas. In ATLAS computing data management most critical baseline performance meets specs continuous struggle with dataset completion despite manpower effort in DDM ops At GridKa, tape I/O usage, performance and optimization is most critical current issue TAB, FZK, 19 Oct 07 16
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