Within the ATLAS hierarchical, multi-tier computing infrastructure, the Tier-0 centre at CERN
is mainly responsible for prompt processing of the raw data coming from the online DAQ …

In this paper, we present the computational task-management tool Ganga, which allows for
the specification, submission, bookkeeping and post-processing of computational tasks on a …

In supervised classification, one attempts to learn a model of how objects map to labels by
selecting the best model from some model space. The choice of model space encodes …

The Affinity Propagation (AP) clustering algorithm proposed by Frey and Dueck (2007)
provides an understandable, nearly optimal summary of a dataset, albeit with quadratic …

Beginning in 2009, the CMS experiment will produce several petabytes of data each year
which will be distributed over many computing centres geographically distributed in different …

During the first two years of data taking, the CMS experiment has collected over 20
PetaBytes of data and processed and analyzed it on the distributed, multi-tiered computing …

The CMS experiment expects to manage several Pbytes of data each year during the LHC
programme, distributing them over many computing sites around the world and enabling …

During the first run, CMS collected and processed more than 10B data events and simulated
more than 15B events. Up to 100k processor cores were used simultaneously and 100PB of …

In a collaboration the size of CMS (approx. 3000 users, and almost 100 computing centres of
varying size) communication and accurate information about the sites it has access to is vital …

Abstract grid-control is a lightweight and highly portable open source submission tool that
supports all common workflows in high energy physics (HEP). It has been used by a …