The INFN-CNAF Tier-1 GEMSS Mass Storage System and database facility activity

16th International workshop on Advanced Computing and Analysis Techniques in physics research

物理学;计算机科学

Ricci, Pier Paolo^1 ; Cavalli, Alessandro^1 ; Dell'Agnello, Luca^1 ; Favaro, Matteo^1 ; Gregori, Daniele^1 ; Prosperini, Andrea^1 ; Pezzi, Michele^1 ; Sapunenko, Vladimir^1 ; Zizzi, Giovanni^1 ; Vagnoni, Vincenzo^2

INFN CNAF, viale Berti Pichat 6/2, Bologna

40127, Italy^1

INFN Sezione di Bologna, via Irnerio 46, Bologna

40126, Italy^2

关键词: Centralized management;    Downtime reduction;    Hierarchical storage;    Management software;    Mass storage system;    Performance optimizations;    Real applications;    Storage resources;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/608/1/012013/pdf
DOI  :  10.1088/1742-6596/608/1/012013

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The consolidation of Mass Storage services at the INFN-CNAF Tier1 Storage department that has occurred during the last 5 years, resulted in a reliable, high performance and moderately easy-to-manage facility that provides data access, archive, backup and database services to several different use cases. At present, the GEMSS Mass Storage System, developed and installed at CNAF and based upon an integration between the IBM GPFS parallel filesystem and the Tivoli Storage Manager (TSM) tape management software, is one of the largest hierarchical storage sites in Europe. It provides storage resources for about 12% of LHC data, as well as for data of other non-LHC experiments. Files are accessed using standard SRM Grid services provided by the Storage Resource Manager (StoRM), also developed at CNAF. Data access is also provided by XRootD and HTTP/WebDaV endpoints. Besides these services, an Oracle database facility is in production characterized by an effective level of parallelism, redundancy and availability. This facility is running databases for storing and accessing relational data objects and for providing database services to the currently active use cases. It takes advantage of several Oracle technologies, like Real Application Cluster (RAC), Automatic Storage Manager (ASM) and Enterprise Manager centralized management tools, together with other technologies for performance optimization, ease of management and downtime reduction. The aim of the present paper is to illustrate the state-of-the-art of the INFN-CNAF Tier1 Storage department infrastructures and software services, and to give a brief outlook to forthcoming projects. A description of the administrative, monitoring and problem-tracking tools that play a primary role in managing the whole storage framework is also given.