BaBar-Grid Status and Prospects Eleonora Luppi Padova 16 ottobre 2003

Motivations for BaBar-Grid Analysis: Having to use several Tier-A in analysis context is impractical Need a tool to automatically submit jobs where the data and CPU cycles are available The GridKa Tier-A will only be accessible through Grid SP-Grid: The Grid concept is very appealing for SP: 23 production sites running the same executable Data Distribution Can be seen as a Grid application The extraction from a Tier-A and transfer to a Tier-C of a deep- copy collection could nicely make use of Grid tools

Existing Grid Implementations LCG (LHC Computing Grid) Makes recommendation for several projects, not only Grid LCG-1 is a grid implementation based on EDG V2.0 Aimed at being the base for a production Grid for LHC PPDG (Particle Physics Data Grid) is a DOE founded Grid project Have connection with other US projects (GriPhyn, iVDGL) SLAC is an active member of PPDG LCG includes some US Grid projects features (VDT, i.e.) EGEE (Enabling Grids for E-science and industry in Europe) New European project Not only for HEP The important point here is that there is a tendency for all the Grid projects to converge on a common set of software components

Relation with EDG / LCG and PPDG BaBar is an official member of the EDG Work Package in charge of HEP Applications (WP8) This is crucial for the success of BaBar-Grid BaBar sites now appears in EDG 2.0 / LCG-1 deployment plans BaBar has a representative in PPDG (Tim Adye) BaBar is a very active tester of the Storage Resource Broker (SRB) which is supported by PPDG It will be crucial to have the same kind of representation within LCG BaBar role in EGEE is still to define But we have contact with EGEE people and things should clarify later

The Current BaBar-Grid Setup

Present Infrastructure (1/2) SLAC will install LCG, but they have not yet started. Some hesitation for security reasons SLAC/SCS actively involved in security development for Grid (PPDG and LCG) Karlsruhe LCG-1 User Interface installed. The intention is to deploy LCG-1 France Still nothing released for users

Present Infrastructure (2/2) INFN LCG-1 installed in Ferrara (Grid.it) Genius interface developed under EDG 1.4.x is migrating to new release UK EDG 2.x installed. RB at Imperial College installed and accessible by BaBar RAL resource opened to BaBar Imperial College will have a LCG-1 RB soon Replica Catalog at Manchester?

BaBarGrid Analysis Successful test using EDG v 1.4.x Prepare executable locally Copy executable to SE and register to RC Prepare JDL to select CE with a close SE where the executable is available Copy executable to WN Run and produce ntuple Copy ntuple to close SE and register to RC The aim is to reproduce this procedure using LCG-1

BaBarGrid SP MC production system ported to LCG-1 SP rpm will be officially distributed with LCG-1 (presently already included in Grid.it ) First tests started ( in Ferrara, Padova, Legnaro, Milano, Trieste, Napoli, Bologna, Bari and Catania). Note: only Ferrara is a BaBarGrid site! Genius is migrating to the new release with a basic set of services for MC (see Enrica)

Future Major Milestones (from IFC Meeting June 27, 2003 - DB) 07/2003: SP grid test runs at GridKa, Naples, Padova, Imperial College and Bristol 09/2003: Virtual Smart Card system (security component) installed at SLAC 12/2003: SP Grid in production in a few sites 01/2004: A full scale analysis running on Grid and producing physics results (~10000 8 hour CPU jobs producing ~500 GB of output) Probably not enough to demonstrate that we have reached production quality on Grid 02/2004: LCG-1 deployed at SLAC We need to setup an important milestone on the Grid integration into the BaBar book-keeping system but we need more discussion in the group Some of these milestones are highly correlated with the availability, the usability and the stability of LCG-1 which is independent from BaBar

Milestones, Opinions & Wishes Genius running under LCG-1 with a (almost) complete set of services SP Grid in production in other Italian sites where Babar & Grid are present Objectivity accessible in more sites then Ferrara! BaBar RB installed at Ferrara (it depends also on a national agreement) RC usable and integrated with the experiment bookkeeping BaBar resources for actual production ……