Speaker
T.M. Steinbeck
(KIRCHHOFF INSTITUTE OF PHYSICS, RUPRECHT-KARLS-UNIVERSITY HEIDELBERG, for the Alice Collaboration)
Description
The Alice High Level Trigger (HLT) is foreseen to consist of a
cluster of 400 to 500 dual SMP PCs at the start-up of the
experiment. It's input data rate can be up to 25GB/s. This has to be
reduced to at most 1.2 GB/s before the data is sent to DAQ through
event selection, filtering, and data compression. For these
processing purposes, the data is passed through the cluster in
several stages and groups for successive merging until, at the last
stage, fully processed complete events are available. For the
transport of the data through the stages of the cluster, a
software framework is being developed consisting of multiple
components. These components can be connected via a common interface
to form complex configurations that define the data flow in the
cluster. For the framework, new benchmark results are available as
well as experience from tests and data challenges run in Heidelberg.
The framework is scheduled to be used during upcoming testbeam
experiments.
Primary authors
H. Tilsner
(KIRCHHOFF INSTITUTE OF PHYSICS, RUPRECHT-KARLS-UNIVERSITY HEIDELBERG, for the Alice Collaboration)
T.M. Steinbeck
(KIRCHHOFF INSTITUTE OF PHYSICS, RUPRECHT-KARLS-UNIVERSITY HEIDELBERG, for the Alice Collaboration)
V. Lindenstruth
(KIRCHHOFF INSTITUTE OF PHYSICS, RUPRECHT-KARLS-UNIVERSITY HEIDELBERG, for the Alice Collaboration)
