ROOT/PROOF Workshop
Authors
Arsen Hayrapetyan, Martin Vala
Abstract
ROOT is an object-oriented framework for large-scale data analysis. PROOF, the Parallel Root Facility, is an extension of ROOT which enables interactive parallel large-scale analysis on a cluster. PROOF Lite, a dedicated version of PROOF, allows to analyse the data on a multi-core computer. In the first part of ROOT/PROOF tutorial the participants will be introduced to ROOT and tools for analysis and visualisation of the data on a desktop machine. Participants will learn how to design and use a custom event class for analysis of data stored in ROOT tree structure. This will be followed by the second part where the structure of the PROOF system and tree/selector-based analysis will be explained. Participants will run analysis tasks on multi-core desktop systems and on a dedicated PROOF cluster in practical exercises.
Prerequisites
- Login/password provided by School organisers in your personal information sheet to connect to UI (user interface) machines. Machines will have ROOT software installed.
- If you plan to use your laptop instead of UI you should have installed ROOT on the laptop. You can download ROOT here.
Presentation outline
ROOT
- Introduction to ROOT.
- Basic ROOT features: Data containers, visualisation, GUI, CLI.
- Trees and chains.
- Events. Sample event class creation.
- Selectors.
- Analysis of data stored in a chain.
PROOF
- Introduction to PROOF.
- PROOF analysis schema.
- Analysing data with PROOF Lite.
- PAR files.
- Analysis with PROOF.