1. ADA aodhisto transformation
Distributed Analysis working group
ATLAS software workshop
Farida Fassi
IFIC, Valencia-Spain
February 21, 2005
19 November, 2018

2. Outline Aodhisto transformation: Review Status
Goals for the next version
19 November, 2018

3. Aodhisto review (1)
√ The aodhisto transformation loops over the events in an ATLAS-POOL
event collection containing AOD and produces histograms.
√ the aodhisto input/output datasets types are the following:
 Input: AtlasPoolEventDataset
 output: RootHistogramDataset
√ aodhisto makes use of an Athena algorithm code supplied by the user,
allowing him/her to process events data for his/her simple AOD analysis.
√ The aodhisto task configuration files are:
- Atlas_release - Version of the ATLAS release -  AnalysisSkeleton.h - Header for user algorithm
-  AnalysisSkeleton.cxx - Source for user algorithm
-  AnalysisSkeleton_jobOptions.py - Job options
√ User can reconfigure aodhisto by manipulating the above task files
19 November, 2018

4. Aodhisto review (2)
 The aodhisto application provides the two logical steps of DIAL:
 Build step:
expands the required directory structure to run
copies the required files to the working area
compiles/links the transformation in the working area
 Run step:
Runs on the output of the build step
Calls the user algorithm for each file to be processed
Produces a set of output files:
AnalysisSkeleton.root, athena.log
Cleans up the working directory
19 November, 2018

5. Status Atlas release Code to be compiled along with its hearder file
√ Currently the ADA aodhisto transformation is in place.
√ To test aodhisto users are invited to get start following the instructions for demo 4, where URL is:
√ aodhisto takes the following runtime arguments (task files):
Atlas release
Code to be compiled along with its hearder file
Input dataset
jobOptions
√ The task_aodhisto.xml file associated to demo4 describes
the task files data mentioned previously.
 the transformation task may be modified by deleting
task_aodhisto.xml and editing the task files.
19 November, 2018

6. Goals for the next version
√ Run aodhisto using any AOD datasets (or other Pool event collection).
√ Provide aodhisto that makes use of a wide range of different algorithms
and Atlas releases.
√ Remove all the dependencies with files located at
BNL/CERN providing an aodhisto application that can run at
any site, which has DIAL installed.
√ Improve aodhisto in such a way that it will provide an
environment to compile the user-supplied code selecting the
CMT executable, Athena and Atlas distribution locations
√ Continue development of aodhisto satisfying the needs
of an Atlas user analysis algorithm .
19 November, 2018