Speaker
Gerardo GANIS
(CERN)
Description
The Parallel ROOT Facility, PROOF, enables the interactive analysis of distributed
data sets in a transparent way. It exploits the inherent parallelism in data of
uncorrelated events via a multi-tier architecture that optimizes I/O and CPU
utilization in heterogeneous clusters with distributed storage. Being part of the
ROOT framework PROOF inherits the benefits of a performant object-oriented storage
system and a wealth of statistical and visualization tools. Dedicated PROOF-enabled
testbeds are now being deployed at CERN for testing by the LHC experiments. This
paper describes the status of PROOF, focusing mainly on the latest developments:
enriched API providing transparent browsing and drawing of data structures stored
remotely, and full handling of the results of queries, with retrieve and archive
functionalities; support for asynchronous (non-blocking) running mode, giving the
possibility to submit a set of queries to be processed sequentially in the
background; support for disconnect/reconnect-from-any-other-place functionality,
allowing the user to temporary leave a session with running queries and reconnect
later on to monitor the status and eventually retrieve the results; improved user
interface with a powerful GUI allowing full control on the system and handling of the
results; support for dynamic cluster configuration using self-discovery techniques to
find out the available nodes; optimized response of the system in multi-user
environments, like those foreseen in the forthcoming HEP experiments, with an
abstract interface to the most common accounting systems. The ongoing developments to
increase the robustness and fault tolerance of the system will also be discussed.
Primary authors
Andreas Joachim Peters
(CERN)
Bertrand Bellenot
(CERN)
Constantin Loizides
(MIT)
Corey Reed
(MIT)
Derek Feichtinger
(PSI)
Fons Rademakers
(CERN)
Gerardo GANIS
(CERN)
Guenter Kickinger
(CERN)
Maarten Ballintjin
(MIT)
Marek Biskup
(CERN)
Paul Nilsson
(CERN)
Philippe Canal
(FNAL)
Rene Brun
(CERN)
