Disk storage at CERN

Disk storage at CERN
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CERN 的磁盘存储

DOI:
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发表时间:
2015
期刊:
影响因子:
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通讯作者:
D. Ster
D. Ster
中科院分区:
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文献类型:
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作者:
L. Mascetti;Eric Cano;B. Chan;Xavier Espinal;A. Fiorot;H. G. Labrador;J. Iven;Massimo Lamanna;G. Presti;Jakub T. Mościcki;A. Peters;Sebastien Ponce;H. Rousseau;D. Ster

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CERN IT DSS主要通过三个系统来运行数据采集和物理分析的主要存储资源:AFS、CASTOR和EOS。用户可用的磁盘总可用空间约为 100 PB(相对比例为 1:20:120)。 EOS 积极使用两个 CERN Tier0 中心(Meyrin 和 Wigner),比例为 50:50。 IT DSS 还为 IT 服务提供大量按需资源,尤其是基于 OpenStack 和 NFS 的客户端:这是由 Ceph 基础设施 (3 PB) 和少数专有服务器 (NetApp) 提供的。我们将描述我们的运营经验和最近对这些系统的更改,特别强调 LHC 数据获取的当前用法,以及在所有服务中共享的商用硬件(每个节点具有 200 TB 的节点,带有可选 SSD)的融合。我们还描述了我们在耦合商品和本土解决方案方面的经验(例如 EOS 中的 CERNBox 集成、AFS、CASTOR 和 NFS 的 Ceph 磁盘池),以及最后这些系统针对 WLCG 及其他系统的未来演变。
CERN IT DSS operates the main storage resources for data taking and physics analysis mainly via three system: AFS, CASTOR and EOS. The total usable space available on disk for users is about 100 PB (with relative ratios 1:20:120). EOS actively uses the two CERN Tier0 centres (Meyrin and Wigner) with 50:50 ratio. IT DSS also provide sizeable on-demand resources for IT services most notably OpenStack and NFS-based clients: this is provided by a Ceph infrastructure (3 PB) and few proprietary servers (NetApp). We will describe our operational experience and recent changes to these systems with special emphasis to the present usages for LHC data taking, the convergence to commodity hardware (nodes with 200-TB each with optional SSD) shared across all services. We also describe our experience in coupling commodity and home-grown solution (e.g. CERNBox integration in EOS, Ceph disk pools for AFS, CASTOR and NFS) and finally the future evolution of these systems for WLCG and beyond.