IFIN-HH LHCB GRID Activities Eduard Pauna Radu Stoica

Activities of Romanian group in LHCb LHCb Romanian group mainly involved in the Calorimeter project. There were 3 types of contributions: –Physicists participated in tests, simulation and reconstruction of events: ECAL: commissioning of the fotomultiplicators and implementation of a monitoring system for testing the fotomultiplicators, HCAL. HCAL: installation of the LED + HV system and testing of the connections of PMT fibers to the LHCb detector –Technicians were involved in construction/installation of various supports and electronics racks –Software contributions: Simulation of the coding/decoding of data received from the TELL1 boards for HCAL and ECAL Gaudi Viewer project

GRID Activities Installation of the LHCb GRID cluster at IFIN- HH started around middle First step: start with a small number of computers (6 machines) and develop the necessary infrastructure Second step: acquisition of a larger number of computers.

Hardware configuration Current hardware configuration includes : 3 P4 2.8 GHz 2 GB RAM 3 dual processor 3 GHz Xeons, 2 GB RAM (worker nodes), 80 GB HDD 15 dual processor 3 GHz Xeons LV, 2 GB RAM, 80 GB HDD (worker nodes) 2 Pentium D 3 GHz, 2 Gb RAM (CE, SE) PCI IDE Controller for 8 additional HDD for a total 5 TB of storage. (SE) UPS

Software configuration SLC bits installed on everything. Ready to move to SLC4 when LHCb will switch to the new OS. From GRID middleware point of view we have installed the standard software packages, corresponding to the typical CE, SE, WN and UI configurations. Using PBS batch system. Additional services to ease the management of the cluster: gateway (firewall, for NAT-ing worker nodes), DHCP+TFTP server, DNS.

Network configuration SE Internet Switch CE GW WN UI

Node installation procedure Configuring the necessary services (DNS, DHCP) Every machine is network installed and configure (DHCP + TFTP for loading a PXE pre-booting environment, then rpm packets installed from a local server via HTTP) GRID middleware installed in the usual way: /opt/glite/yaim/scripts/install_node config_file

Site status Site has GRID certificate and user are members of the DTEAM and LHCb VO. The site was just registered and started to be tested (RO-11-NIPNE). The site started receiving test jobs and its status can be viewed at: We’ve just submitted our request for certification and in the following days the Site Functional Tests should be run. With the help of the LHCb team from CERN we will try to run our first LHCb jobs in the following days. The LHCb applications has been successfully installed on our machines.

Plans Mr. Eduard Pauna is going to be fully responsible for the management of the LCG site (I will be based at CERN for the next couple of years). New hardware acquisition scheduled in couple of months: ~10 machines are estimated to be bought (>50 CPU target). Optimizing the network link (hoping for a higher speed line). Optimizing the storage (if it proves to be a bottleneck) by buying a better controller for the HDDs Small optimizations for LHCb software