A first look at 100 Gbps LAN technologies, with an emphasis on future DAQ applications.

21st International Conference on Computing in High Energy and Nuclear Physics

物理学;计算机科学

Otto, Adam^1 ; Pérez, Daniel Hugo Cámpora^1 ; Neufeld, Niko^1 ; Schwemmer, Rainer^1 ; Pisani, Flavio^1

CERN, Geneva, Switzerland^1

关键词: Data acquisition system;    Event building;    First look;    LAN technologies;    Load effects;    Remote DMA;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/664/5/052030/pdf
DOI  :  10.1088/1742-6596/664/5/052030

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

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.