University of Johannesburg South Africa. Stavros Lambropoulos Network Engineer

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2 University of Johannesburg South Africa Stavros Lambropoulos Network Engineer

3 History of the UJ Research Cluster User Groups Hardware South African Compute Grid (SA Grid) Status Applications Issues Future Links Contributions

4 UJRC started as an initiative of the High Energy Physics Group March The UJ-OSG Compute Element passes validation and is registered on VORS March CPU Cores available

5 High Energy Physics(Physics) Astrophysics(Physics) Molecular Dynamics(Chemistry) Quantum Chemistry(Chemistry) Applied Mathematics Numerical Studies(Engineering)

6 1 Head Node comprising : Dell 2950, 2 x 4 Core Xeon Processors 16 GB RAM 900 GB RAID5 Scientific Linux 4/64 Bit hosts : NFSv4, Accounts, Torque, Ganglia

7 Separate Virtual Machines (VMWare Server) for : OSG CE (1 GB RAM) OSG UI (submit node) (2 GB RAM) glitece (1 GB RAM) gliteui (submit node) (1 GB RAM)

8 7 Worker Nodes comprising : Dell 1425, 2 x 4 Core Opteron Processors 16 GB RAM Scientific Linux 4/64 Bit glite sw locally installed OSG swfrom NFS Alcatel 6400 Gig Switch

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10 The South African National Grid is a project to provide a national grid computing infrastructure to support scientific computing and collaboration. This project is coordinated by a consortium of universities, national laboratories and the MerakaInstitute, under the cyber infrastructure programme, based on the glite middleware.

11 OSG is operational on SL4 base

12 Started Discussion on the choice of referent Tier1/Tier2 for ATLAS and ALICE WN s, CE s and UI s to be updated to SL5 as requested by LHC Computing Grid Cobbler and Puppet to be used for the new SL5 node installation and management Updating of Head Node from SL4/VMWare to SL5/Xen is planned

13 2 Commercial Applications Running Locally : ANSYS FLUENT Flow modeling Software Star-CCM+ -Computational Fluid Dynamics Other Local Applications : Geant4 for NA63, MineralPET NA63 dedicated simulation code Diamond Lattice Deformation

14 On OSG : ENGAGE VO runs a few jobs Full ATLAS VO Support local ATLAS users submit remote jobs from local UI Initial discussions have started to allow DOSAR VO On SAGrid: Will allow SAGridVO s ALICE VO ATLAS

15 The UJ Research Cluster and the OSG GRID UJ Physics High Energy Physics, ATLAS experiment at CERN Ketevi Assamagan, Simon Connell, Sergio Ballestrero, Claire Lee, Neil Koch, Phineas Ntsoele ATHENA installed, using Pythia event generator to study various Higgs scenarios.

16 UJ Physics Diamond Ore Sorting (Mineral-PET) Sergio Ballestrero, Simon Connell, Norman Ives, Martin Cook, Winile Sibande GEANT4 MonteCarlo Online diamond detection Online Monte diamond Carlo simulation detection

17 Limited International Bandwidth Currently Using 11Mb/s To be Upgraded early next year with the SEACOM cable

18 Additional complexity to manage both OSG and glite Lack of caching by OSG installer, partially solved with local Squid cache No automated install & configsystem yet, starting to work on Cobbler and Puppet NFSv4 problematic on SL4 Monitoring, need to add detailed job monitoring/stats for Torque

19 Manpower Grid services not primary job/role for the 3 people Low Usage Marketing of services and availability has been done but researchers are slow to start No experience gathered on utilization of resource in terms of constraints on memory, disks, CPU and network VO acceptance policy required

20 Hardware Upgrade : Additional 4 x WN s being configured 1 x Dell MD1000 Storage shelf (6TB raw) will be connected to the Head Node. Ordered 16 x WN s(dell M605 blade chassis, with 2 x 6 Cores, 32GB Ram) Ordered 224 Cores will be available DOSAR Workshop in South Africa in 2010

21 University of Johannesburg UJ Physics South African Grid

22 Prof. S. Connell UJ Physics Department Sergio Ballestrero-Physics & CERN ATLAS TDAQ Francois Mynhardt UJ I.C.S Department

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