A first look at 100 Gbps LAN technologies, with an emphasis on future DAQ applications. Issue 5 (December 2015)

• Record Type: Journal Article
• Authors: Otto, Adam; Pérez, Daniel Hugo Cámpora; Neufeld, Niko; Schwemmer, Rainer; Pisani, Flavio
• Is Part Of: Journal of physics. Volume 664:Issue 5(2015)
• Publication Date: 2015-12
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/664/5/052030
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The LHCb experiment is preparing a major upgrade, during long shutdown 2 in 2018, of both the detector and the data acquisition system. A system capable of transporting up to 50 Tbps of data will be required. This can only be achieved in a manageable way using 100 Gbps links. Such links recently became available also in the servers, while they have been available between switches already for a while. We present first measurements with such links using standard benchmarks and using a prototype event-building application. We analyse the CPU load effects by using Remote DMA technologies, and we also show comparison with previous tests on 40G equipment.