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VALENCIA TESTBED SITE

VALENCIA TESTBED SITE. IFIC (Instituto de Física Corpuscular) Universitat de València-CSIC. GoG Farm. 192 Athlon PC (134 IFIC + 58 ICMOL) VIA KT133A & KT266A based MotherBoard CPU: AMD Athlon K7 @ 1.2 & 1.4 GHz RAM: 2x512 Mbytes (SDRAM & DDR SDRAM) HD: 40 Gbytes

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VALENCIA TESTBED SITE

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  1. VALENCIA TESTBED SITE IFIC (Instituto de Física Corpuscular) Universitat de València-CSIC

  2. GoG Farm • 192 Athlon PC (134 IFIC + 58 ICMOL) • VIA KT133A & KT266A based MotherBoard • CPU: AMD Athlon K7 @ 1.2 & 1.4 GHz • RAM: 2x512 Mbytes (SDRAM & DDR SDRAM) • HD: 40 Gbytes • NIC: 3COM 905CX & RealTek RTL8139 (Fast Ethernet + PXE) • 2U chassis IFIC (CSIC-València)

  3. GoG Farm • 9 racks (800x600 mm) • 22 PCs + 1 network switch per rack • 2U chassis with 3 fans • pros: • less space required • cons: • add 240 euros per PC (aprox.) • heat concentration IFIC (CSIC-València)

  4. GoG Farm IFIC (CSIC-València)

  5. GoG Farm IFIC (CSIC-València)

  6. GoG Farm IFIC (CSIC-València)

  7. GoG Farm IFIC (CSIC-València)

  8. GoG Farm 2U chassis Athlon PC IFIC (CSIC-València)

  9. Local Network IFIC (CSIC-València)

  10. Local Network • All Worker Nodes have private IP addresses in the net 192.168.4.0/22 • secure environment • administrative independence from University network management staff • Communication equipment have public IP addresses in the net 147.156.149.64/26 • can be monitored and upgraded from University centralized service IFIC (CSIC-València)

  11. Local network • External communications go through gog01 in which NAT rules are applied • Connections from Worker Nodes to public nodes are allowed through masquerading with some restrictions, eg: • FTP requires passive mode • Connections from external nodes to Worker Nodes requires a previous NAT rule to be configured. IFIC (CSIC-València)

  12. Monitoring • GoG Heartbeat • Senders (worker nodes) send multicast packets with node info & status in xml format at time intervals. • Receivers collect info to build statistics or to present a graphical view of the farm to an operator • pros: • connectionless • several receivers can run at the same time • cons: • everybody can read packets IFIC (CSIC-València)

  13. Monitoring • Main window: • dead/alive status • cpu usage • memory • disk (picture refers to IFIC network, not farm) IFIC (CSIC-València)

  14. Monitoring • Client info window • reflects info sent by the client • as obtained mostly from /proc IFIC (CSIC-València)

  15. LCFG configuration • LCFG configuration is being deployed • Worker nodes boots always using PXE • DHCP server sends: • A PXE_MENU with remote linux image and parameters the first time. • A PXE_MENU with local boot other times IFIC (CSIC-València)

  16. LCFG configuration • Use slightly modified LCFG package to: • use PXE booting • allow extended partitions on HD • allow different domain than ypdomain • notify DHCP server at the end of installation the first time IFIC (CSIC-València)

  17. LCFG configuration • We plan to switch to LCFG to configure Worker Nodes, but lack of some LCFG objects prevent us from doing it now (however, it seems that it will be solved soon) • But, we will use LCFG to configure our Crossgrid TestBed for sure. IFIC (CSIC-València)

  18. Current grid Activities • We are participating in this year in the DATA CHALLENGE (DC1) of ATLAS experiment with to goals: • Event production in our farm in order to provide samples for physics studies and make the Technical Design Report for the end of 2002. • To test in our farm the new software, including Geant4, the new event data model and the evaluation of database technologies (e.g. Root-I/O). IFIC (CSIC-València)

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