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

2. 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

3. 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

4. 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

5. The Current BaBar-Grid Setup

6. 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

7. 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?

8. 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

9. 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)

10. 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 (~ 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

11. 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 ……