The implementation of the STAR data-acquisition system using a Myrinet Network

Citation
Jm. Landgraf et al., The implementation of the STAR data-acquisition system using a Myrinet Network, IEEE NUCL S, 48(3), 2001, pp. 601-606
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Nuclear Emgineering
Journal title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
ISSN journal
0018-9499 → ACNP
Volume
48
Issue
3
Year of publication
2001
Pages
601 - 606
Database
ISI
SICI code
0018-9499(200106)48:3<601:TIOTSD>2.0.ZU;2-T
Abstract
We will present results from the first year of operation of the STAR data-a cquisition (DAQ) system using a Myrinet Network. STAR is one of four experi ments to have been commissioned at the Relativistic Heavy Ion Collider (RHI C) at Brookhaven National Laboratory during 1999 and 2000. The DAQ system i s fully integrated with a Level 3 Trigger. The combined system currently co nsists of 33 Myrinet Nodes, which run in a mixed environment of MVME proces sors running VxWorks, DEC Alpha workstations running Linux, and SUN Solaris machines. The network will eventually contain up to 150 nodes for the expe cted final size of the L3 processor farm. Myrinet is a switched high-speed low-latency network produced by Myricom and available for PCI and PMC on a wide variety of platforms. The STAR DAQ system uses the Myrinet network for messaging, L3 processing, and event building. After the events are built, they are sent via gigabit ethernet to the RHIC computing facility and store d to tape using HPSS. The combined DAQ/L3 system processes 160-MB events at 100 Hz, compresses each event to 20 NIB, and performs tracking on the even ts to implement a physics-based filter to reduce the data storage rate to 2 0 MB/s.