ATLAS Computing @ RZG

Status and Upgrade Plans

Installation

Hardware

4 (5) IBM BladeCenter Chassis, 14 blades each

2 Xeon 3.02 GHz 64bit, 2 GB RAM, Gb LAN / blade

ca. 7.5 TB disk on fileservers

access to tape storage

Software:

RH9 (RZG), afs

Sun Grid Engine (SGE) batch queue system

ATLAS SW 9.0.2 (→9.0.4), 9.2.0

Operation

data and tape access via afs

SGE batch queue system for our cluster

possibility to share with other RZG clusters

installation and test of athena successful

KitVal, RecExCommon

direct access to ATLAS cvs repo possible

needs ssh configuration

RZG personnel responsive and helpful

Upgrade plans

Intent to build ATLAS Tier-2

collaboration between LMU, LRZ, RZG, MPI

Base resource requirements on ATLAS cm

Plan to support ~30 users

1.5 x average Tier-2

MPI, LMU, possibly other universities

Ongoing discussion about ATLAS Tier-2

Wuppertal, Mainz, FZK, DESY?

not all of these will make it

ATLAS Computing Model

New report ATL-SOFT-2004-007

Hierarchical Tier structure

Tier-0: recording, distribution, prompt reco

Tier-1: data storage, reprocessing, ESD/AOD production, scheduled analysis

Tier-2: simulation, “chaotic” analysis, calibrations

Tier-3: local, “ntuple”-level analysis

Revised requirements following DCs, HLT-TDR and athena progress

MPI/LMU/LRZ/RZG Tier-2

Requirements / 1 a ATLAS running

CPU: 540 kSi2k

Disk: 230 TB (no tape storage requirement)

WAN: O(100 Mb/s) sustained

Assumptions:

30 users (1.5 x average)

equal share between LMU/LRZ and MPI/RZG

full capacity for 2007 at end of 2006

Extrapolate from existing RZG system

Tier-2
Development

Summary

MPI/ATLAS computing at RZG works

Installation of Tier-2 feasible

Made (make) use of MPG-Grossgeräte-Programme

Collaboration with LMU/LRZ

2005-01-28T10:35:58