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Prof. Nectarios Koziris Vice Chairman, GRNET ICCS, NTUA

Prof. Nectarios Koziris Vice Chairman, GRNET ICCS, NTUA. Building a nation-wide production Grid infrastructure: the HELLASGRID project. HELLASGRID in a nutshell. National Grid Initiative led by GRNET (2002), deployed on top of 2,5 Gbps GRNET network

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Prof. Nectarios Koziris Vice Chairman, GRNET ICCS, NTUA

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  1. Prof. Nectarios KozirisVice Chairman, GRNETICCS, NTUA Building a nation-wide production Grid infrastructure: the HELLASGRID project

  2. HELLASGRID in a nutshell • National Grid Initiative led by GRNET (2002), deployed on top of 2,5 Gbps GRNET network • HG-01 cluster @ Demokritos: 64 CPU, 10TB FC SAN, 12TB Tape Library, LCG2/EGEE middleware • HG02-HG06 clusters located @NDC, IASA, AUTH, FORTH, CTI research centers. • ~800 CPUs (x86_64, 2 GB RAM, 80GB HDD, 2x Gbit) • ~30 TBytes total raw SAN storage capacity • ~80TBytes Tape Library • 4 Access Grid nodes http://www.hellasgrid.gr/infrastructure

  3. HG structure • Main site: HG-01-GRNET (Isabella, cslab@ICCS/NTUA) • HG-02…HG-06 sites + operation centers (NDC, IASA, AUTH, FORTH, CTI) • 5 smaller sites (AUTH, UoM, FORTH, Demokritos, HEP-NTUA) • HG CA and VOMS (GridAUTH, Dept. of Physics, AUTH) • HG helpdesk (CTI) • Regional monitoring tools(FORTH) • HG user support/apps (Demokritos + all site teams) • 4 AccessGRID sites HG membership: more than 20 Universities + 15 Research Institutes Feb 06 update: 6+5 infrastructure sites, > 900 CPUs in total

  4. HG-01-GRNET Isabella

  5. HellasGrid Infrastructure, Phase II, NDC (2/2006)

  6. HG-01: operations targets • High node availability • Through HW and SW redundancy • Security • Timely resolution of problems • Efficient collaboration between team members; ticketing system, interface with EGEE ticketing • Close cooperation with VOs

  7. HW/SW Redundancy • RAID1 on Service Nodes and WNs • Reliable Data Storage Infrastructure • RAID5 volumes on storage array • Redundant FC controllers • Redundant FC links in failover mode forGPFS storage nodes • Node redundancy at the GPFS level • Redundant GPFS storage nodes • One primary / one secondary per Network Storage Device (NSD) • Redundant network service instances • DNS two on-site, two off-site servers

  8. Security: OpenVPN • Management interfaces unreachable from the outside • Secure remote access to management VLAN using the free OpenVPN tool • Certificate-based authentication, SSL-based encryption • security hierarchy with different levels • Platinum: Backup server, Remote Console Access • Gold: Management Server • Copper: Worker Nodes for the Grid

  9. Day-to-day Operations • Operations in shifts, faster response • Use of global EGEE monitoring tools • Local monitoring tools: Ganglia, MRTG • Vendor-specific tools • IBM Cluster Systems Management • Monitors various node health parameters • Sends e-mail alerts which are routed to mobiles • Web-based ticketing system, also for archiving • Weekly meetings

  10. Day2Day Collaboration • Request Tracker (RT) • Web-based Ticketing System. • E-mails to hg-01-grnet@hellasgrid.gr are automatically added to the Request Tracker. • Used mainly for day2day collaboration and maintenance. Problem reports are rare. • Permanent archive of information on allevents during shifts. • Facilitates integration of new team members. • Acts as an HG Knowledge base.

  11. RT ticketing system: the big picture

  12. Introduction of HG-0x sites: • Streamlining of new site installations • Guide for new HW installations • Customized instructions for OS deployment • Certification Period • Certification SFTs run by the HG-01-GRNET team for all yet uncertified sites • Site enters production when the tests have run without problems for 5 days

  13. HG Local Users distribution per Discipline

  14. CPU Hours per Site

  15. HellasGrid CA statistics:

  16. CPU time: distribution of overall EGEE VOs usage of HG infrastructure

  17. Cornerstones to Hellasgrid: • Widely available distributed e-Infrastructures (network, storage, computer nodes) • GRID aware communities • GOCs • Infrastructure integrators • middleware developers • end-users • Need for GRID enabled Applications! “glue && cement” for the cornerstones above? GRNET network

  18. HG international role Synergies: • South East Europe • SEE Regional Operations Centre • Coordination of SEEGRID project by GRNET • EU Research Infrastructures (EGEE-I & EGEE-II) • EU GRID projects: operations and research (EumedGrid, EuChinaGrid, GRIDCC, e-IRGSP)

  19. GRNET NGI role: • HG follows NGI-EGO paradigm: • GRNET: • Provides/deploys/operates GRID research infrastructure (RI) • Coordinates national GRID efforts/activities • Has an application neutral role • GRNET acts as an early champion for the SEE area (See Tuesday’s talk (11:50) by Ognjen Prnjat,GRNET: ”Towards Production Grids in Greenfield Regions”)

  20. Conclusions/Experiences • Local “incubators” for GRID technology needed-experts in local sites • Training, Training, Training! • Users+Apps, Users+Apps, Users+Apps! • Pilot Applications: GRID-APP call (GSRT) received 45 proposals! • GOC&NOCs cooperation, NRENs play vital role • International coordination/concertation in middleware, VOs, infrastructures for Prod.Level.GRID • New application calls from GSRT should be planned

  21. For more: www.hellasgrid.gr Welcome to Hellas...GRID!

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