Performance and scalability of the back-end sub-system in the ATLAS DAQ/EF prototype

Abstract

Thc DAQ group of the futurc ATLAS experiment has developed a prototype system based on the TriggerIDAQ architccturc descrihctl in tlic ATLAS Technical Propusal [I] to support studios of the full system lunctionality, nrchitccturc BS wcll as availnhlc hardware and software technologies.Onc sub-systcm of this prototype is thc hack-end which cncompasses the softwarc nccdcd to configure, control and monitor tlic DAQ, hut cxcludcs lhc processing and transportation of physics data.The back-end consists OS a number of coinponents including run control, configuration datahascs and messago reporting system. l'hc softwnrc has hccn dcvelnped using standard, external softwnrc technologies such as 00 databases and CORHA. It has been portcrl to several C++ compilers and opcrating systcms including Solaris, Linux, WNT and LynxOS. This paper gives an ovcrvicw of thc hack-end software, its performance, scalability and current status.