Renovation of HEPnet-J for near-future experiments

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

物理学;计算机科学

Suzuki, Soh Y.^1 ; Yuasa, Fukuko^1 ; Nakamura, Tomoaki^1 ; Hara, Takanori^1

High Energy Accelerator Research Organization (KEK), Japan^1

关键词: Distributed computing models;    Expected throughput;    Generation experiments;    International collaborations;    International connectivity;    Network connectivity;    Private networks;    Security devices;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/664/5/052036/pdf
DOI  :  10.1088/1742-6596/664/5/052036

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

Originally HEPnet-J had only one instance that is connected to Internet as the network connectivity by campus network of institutes in Japan was very limited, so the main purpose of HEPnet-J was providing enough connectivity for interactive use on domestic and international links funded by KEK. In last 10 years, the domestic and international connectivity provided by NRENs have been dramatically improved and they are enough for manual transfer of typical skimmed data files. Therefore, HEPnet-J has many closed networks that connect domestic sites related to specific projects, in order to access them on computer farms in private networks in their home institutes. The rapid growth of data volume makes it unable to apply same model to new generation experiments. As the tier structure for LHC computing sites has proved that the distributed computing model over collaboration sites is really applicable to the huge scale experiment, the external connectivity for international collaboration sites should be faster and secure. For example, the Belle II experiment in KEK will have many repositories in U.S. and EU. The expected throughput from KEK to U.S. is about 20 Gbps, thus it need the bypass of slow security devices like a firewall. Now bypass lines for Belle II are prepared and under tasting. This article reports the brief history of HEPnet- J and recent changes for project-specific networks.