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RozoFS is a scale-out NAS file system. It comes as a free software, licensed under the GNU GPL v2. RozoFS provides an easy way to scale to petabytes storage but using erasure coding it was designed to provide very high availability levels with optimized raw capacity usage on heterogeneous commodity hardware. RozoFS well fits every environment dealing with huge among of data as: * Big data ; * Cloud computing ; * Multimedia applications ; * Backup and archival storage. == Design == Rozo provides a native open source POSIX filesystem, built on top of a usual out-band scale-out storage architecture as Google File System, Lustre or Ceph. The Rozo specificity lies in the way data is stored. The data to be stored is translated into several chunks using Mojette Transform and distributed across storage devices in such a way that it can be retrieved even if several pieces are unavailable. On the other hand, chuncks are meaningless alone. Redundancy schemes based on coding techniques like the one used by RozoFS allow to achieve significant storage savings as compared to simple replication. The file system comprises three components: * Exports server — (Meta Data Server) manages the location (layout) of chunks (ensure the best capacity load balancing with respect to high availability), file access and namespace (hierarchy). Multiple replicated metadata servers are used to provide failover.The Exports server is a user-space daemon; the metadata are stored synchroneously to a usual file system (the underlying file system must support extended attributes). * Storage servers — (Chunk Server) store the chunks. The Chunk server is also a user-space daemon that relies on the underlying local file system to manage the actual storage. * Clients — talk to both the exports server and chunk servers and are responsible of data transformation. Clients mount the file system into user-space via FUSE. 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「RozoFS」の詳細全文を読む スポンサード リンク
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