Abstract
IBM Spectrum Protect (ISP) software, one of the leader solutions in data protection, contributes to the data management infrastructure operated at CNAF, the central computing and storage facility of INFN (Istituto Nazionale di Fisica Nucleare – Italian National Institute for Nuclear Physics). It is used to manage about 55 Petabytes of scientific data produced by LHC (Large Hadron Collider at CERN) and other experiments in which INFN is involved, stored on tape resources as the highest latency storage tier within HSM (Hierarchical Space Management) environment. To accomplish this task, ISP works together with IBM Spectrum Scale (formerly GPFS - General Parallel File System) and GEMSS (Grid Enabled Mass Storage System), an in-house developed software layer that manages migration and recall queues. Moreover, we perform backup/archive operation of main IT services running at CNAF, such as mail servers, configurations, repositories, documents, logs, etc. In this paper we present the current configuration of the HSM infrastructure and the backup and recovery service, with particular attention to issues related to the increasing amount of scientific data to manage, expected for the next years.
Highlights
The computing and data centre hosted at INFN-CNAF is one of the 13 Tier 1s of the WLCG (Worldwide LHC Computing Grid), that receive data produced by the LHC experiments
Data are stored on both disk and tape resources
It is responsibility of CNAF to implement, manage, maintain and support many services which are fundamental for the entire INFN, such as general ICT services and INFN Information System services
Summary
The computing and data centre hosted at INFN-CNAF is one of the 13 Tier 1s of the WLCG (Worldwide LHC Computing Grid), that receive data produced by the LHC experiments. CNAF provides computing and storage facilities for 30 other experiments in which INFN is involved, belonging to Astrophysics, Astro-particle Physics and High Energy Physics domains. Data are stored on both disk and tape resources. At the time of writing, ~20 PB of data reside on disk and ~55 PB on tape. It is responsibility of CNAF to implement, manage, maintain and support many services which are fundamental for the entire INFN, such as general ICT services (top level domain management; coordination of academic and INFN Wi-Fi roaming infrastructure; backup of INFN Certification Authority data; centralized management of INFN Web sites; creation of software development tools and collaborative tools) and INFN Information System services
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