Title :
Investigation of the networking performance of remote real-time computing farms for ATLAS trigger DAQ
Author :
Caron, Bryan ; Hughes-Jones, Richard ; Korcyl, Krzysztof ; Meirosu, Catalin ; Nielsen, Jakob Langgard
Author_Institution :
Alberta Univ., Edmonton, Alta.
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 behaviour 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 realtime 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; particle accelerators; particle detectors; performance evaluation; real-time systems; telecommunication traffic; transport protocols; virtual private networks; wide area networks; ATLAS experiment; ATLAS trigger DAQ; Internet protocol; TCP/IP; application data; data traffic pattern; data transfer; dedicated lightpath; networking performance; online farm; realtime event selection; remote realtime computing farm; request-response protocol; standard production network; transport protocol; trigger/data acquisition system; 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;
Conference_Titel :
Real Time Conference, 2005. 14th IEEE-NPSS
Conference_Location :
Stockholm
Print_ISBN :
0-7803-9183-7
DOI :
10.1109/RTC.2005.1547463
