Using GANGA with AMAAthena

Introduction

This document gives an step-by-step instruction for running AMAAthena within GANGA. AMAAthena is a Athena package providing ... mainly developed at NIKHEF. GANGA is an official ATLAS grid utility for distributed data analysis.

Before starting Ganga

1. follow the CMT instructions to setup your CMTHOME directory
2. checkout the AMAAthena package from CVS
3. make sure your environment is clean (i.e. no Athena/CMT environment variables)

Starting GANGA

Typing the following commands within the directory: PhysicsAnalysis/AnalysisCommon/AMA/AMAAthena/cmt

% source /project/atlas/nikhef/dq2/dq2_setup.sh.NIKHEF
% export DPNS_HOST=tbn18.nikhef.nl
% export LFC_HOST=lfc-atlas.grid.sara.nl
% source /project/atlas/nikhef/ganga/etc/setup.[c]sh
% ganga --config-path=/project/atlas/nikhef/ganga/config/Atlas.ini.nikhef

Magic functions for cmtsetup

Inside GANGA, one could deal with the complex CMT setup with two magic functions. The following example assumes an use case of loading ATLAS release 14.2.0 in 32 bit mode:

In [1]: config.Athena.CMTHOME = '/your/cmthome'
In [2]: cmtsetup 14.2.0,32
In [3]: setup

Running AMAAthena on Stoomboot cluster

Using StagerDataset

Create a new job

In [1]: j = Job()

Setup the application:

In [2]: j.application = AMAAthena()
In [3]: j.application.option_files += [ File('../run/AMAAthena_jobOptions.py'), File('../run/Trigger_jobOptions.py') ]
In [4]: j.application.driver_config.config_file = File('../run/exampleaod.conf')
In [5]: j.application.driver_config.include_file += [ File('../run/reader.conf') ]
In [6]: j.application.max_events = '1000'
In [7]: j.application.prepare()

Setup the inputdata:

In [8]: j.inputdata = StagerDataset()
In [9]: j.inputdata.dataset += [ 'fdr08_run2*physics_Muon*AOD*o3*' ]

Setup the job splitter (optional):

In [10]: j.splitter = StagerJobSplitter()
In [11]: j.splitter.numfiles = 2

Setup the backend:

In [12]: j.backend = PBS()

Submit the job:

In [13]: j.submit()

Working in progress

1. supporting StagerDataset for jobs on the grid (LCG/NG)