Investigation of the Networking Performance of Remote Real-Time Computing Farms for ATLAS Trigger DAQ

Author

Caron, B. ; Hughes-Jones, R. ; Korsyl, K. ; Meirosu, C. ; Neilsen, J.L.

Author_Institution

Alberta Univ., Edmonton, Alta.

Volume

53

Issue

4

fYear

2006

Firstpage

2150

Lastpage

2155

Abstract

To test the feasibility of using remote farms to perform real-time event selection in the Trigger/Data Acquisition System for the ATLAS experiment at CERN, a Proof of Concept was set up during 2004. The behavior of the request-response protocol to move application data has been measured for remote farms connected with different Wide Area Networks including a dedicated lightpath, a Virtual Private Network, and the standard production network. The dynamics and effect of using TCP/IP as the transport protocol has also been investigated for this real-time application. These data are compared with conventional bulk data transfers and used to validate the observed performance of the online farms and estimate the effect of this traffic pattern on the Wide Area Network

Keywords

data acquisition; high energy physics instrumentation computing; nuclear electronics; position sensitive particle detectors; real-time systems; transport protocols; trigger circuits; virtual private networks; wide area networks; ATLAS trigger DAQ; CERN; TCP-IP dynamics; data acquisition system; networking performance; real-time event selection; remote real-time computing farms; request-response protocol behavior; standard production network; transport protocol; virtual private network; wide area network; Area measurement; Computer networks; Data acquisition; Measurement standards; Performance evaluation; Protocols; Real time systems; System testing; Virtual private networks; Wide area networks; Protocols; TCP; real time systems; wide area networks;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2006.878895

Filename

1684079