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Lustre is a type of parallel distributed file system, generally used for large-scale cluster computing. The name Lustre is a portmanteau word derived from Linux and cluster. Lustre file system software is available under the GNU General Public License (version 2 only) and provides high performance file systems for computer clusters ranging in size from small workgroup clusters to large-scale, multi-site clusters. Because Lustre file systems have high performance capabilities and open licensing, it is often used in supercomputers. Since June 2005, it has consistently been used by at least half of the top ten, and more than 60 of the top 100 fastest supercomputers in the world,〔(【引用サイトリンク】 title=Lustre File System, Version 2.4 Released )〕〔(【引用サイトリンク】 title=Open-source Lustre gets supercomputing nod )〕〔(【引用サイトリンク】 title=Xyratex Captures Oracle’s Lustre )〕 including the world's No. 2 and No. 3 ranked TOP500 supercomputers in 2014, Titan and Sequoia.〔(【引用サイトリンク】 title=Titan System Overview )〕 Lustre file systems are scalable and can be part of multiple computer clusters with tens of thousands of client nodes, tens of petabytes (PB) of storage on hundreds of servers, and more than a terabyte per second (TB/s) of aggregate I/O throughput.〔(【引用サイトリンク】 Spider Center-Wide File System )〕〔(【引用サイトリンク】 Rock-Hard Lustre: Trends in Scalability and Quality )〕 This makes Lustre file systems a popular choice for businesses with large data centers, including those in industries such as meteorology, simulation, oil and gas, life science, rich media, and finance.〔 By Peter Braam, November 10, 2007〕 == History == The Lustre file system architecture was started as a research project in 1999 by Peter Braam, who was on the staff of Carnegie Mellon University (CMU) at the time. Braam went on to found his own company Cluster File Systems in 2001, starting from work on the InterMezzo file system in the Coda project at CMU. Lustre was developed under the Accelerated Strategic Computing Initiative Path Forward project funded by the United States Department of Energy, which included Hewlett-Packard and Intel. In September 2007, Sun Microsystems acquired the assets of Cluster File Systems Inc. including its intellectual property. Sun included Lustre with its high-performance computing hardware offerings, with the intent to bring Lustre technologies to Sun's ZFS file system and the Solaris operating system. In November 2008, Braam left Sun Microsystems, and Eric Barton and Andreas Dilger took control of the project. In 2010 Oracle Corporation, by way of its acquisition of Sun, began to manage and release Lustre. In December 2010, Oracle announced they would cease Lustre 2.x development and place Lustre 1.8 into maintenance-only support creating uncertainty around the future development of the file system.〔(【引用サイトリンク】 title=Oracle has Kicked Lustre to the Curb )〕 Following this announcement, several new organizations sprang up to provide support and development in an open community development model, including Whamcloud, Open Scalable File Systems, Inc. (OpenSFS), EUROPEAN Open File Systems (EOFS) and others. By the end of 2010, most Lustre developers had left Oracle. Braam and several associates joined the hardware-oriented Xyratex when it acquired the assets of ClusterStor, while Barton, Dilger, and others formed software startup Whamcloud, where they continued to work on Lustre. In August 2011, OpenSFS awarded a contract for Lustre feature development to Whamcloud. This contract covered the completion of features, including improved Single Server Metadata Performance scaling, which allows Lustre to better take advantage of many-core metadata server; online Lustre distributed filesystem checking (LFSCK), which allows verification of the distributed filesystem state between data and metadata servers while the filesystem is mounted and in use; and Distributed Namespace (DNE), formerly Clustered Metadata (CMD), which allows the Lustre metadata to be distributed across multiple servers. Development also continued on ZFS-based back-end object storage at Lawrence Livermore National Laboratory.〔 These features were in the Lustre 2.2 through 2.4 community release roadmap. In November 2011, a separate contract was awarded to Whamcloud for the maintenance of the Lustre 2.x source code to ensure that the Lustre code would receive sufficient testing and bug fixing while new features were being developed. In July 2012 Whamcloud was acquired by Intel, after Whamcloud won the FastForward DOE contract to extend Lustre for exascale computing systems in the 2018 timeframe. OpenSFS then transitioned contracts for Lustre development to Intel. In February 2013, Xyratex Ltd., announced it acquired the original Lustre trademark, logo, website and associated intellectual property from Oracle.〔 In June 2013, Intel began positioning Lustre for commercial uses, such as within Hadoop. For 2013 as a whole, OpenSFS announced request for proposals (RFP) to cover Lustre feature development, parallel file system tools, addressing Lustre technical debt, and parallel file system incubators. OpenSFS also established the Lustre Community Portal, a technical site that provides a collection of information and documentation in one area for reference and guidance to support the Lustre open source community. On April 8, 2014, Ken Claffey announced that Xyratex/Seagate is donating the lustre.org domain back to the user community,〔(【引用サイトリンク】url=http://insidehpc.com/2014/04/seagate-donates-lustre-org-user-community/ )〕 and was completed in March, 2015. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lustre (file system)」の詳細全文を読む スポンサード リンク
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