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zFS refers to two different IBM file systems: * zFS most often refers to ''z/OS Distributed File Service zSeries File System'', the newest POSIX-style hierarchical file system for IBM's z/OS operating system, a successor to that operating system's HFS.〔http://www.ti-leipzig.de/os390/book/openmvs/hfs.pdf〕 zFS, as a separate entity, was initially released as PTFs (patches) for z/OS 1.2 with backports available for z/OS 1.1 and OS/390 2.10. Beginning with z/OS 1.3, zFS is included as a standard feature and is being actively developed. However, zFS was actually first released in 1995 as the Local File System, a lower layer of the DCE Distributed File System. It was available on MVS/ESA V5R2.2 and all OS/390 releases. DFS/LFS was provided as a part of the DCE feature, not of the base operating system as in z/OS. * zFS was also an IBM research project to develop a distributed, decentralized file system. It was a follow-on to the IBM DSF (Data Sharing Facility) project to build a serverless file system. Neither file system has any relation to Oracle/Sun's ZFS. == External links == * (z/OS Distributed File Service zSeries File System Implementation ) * (zFS serverless project Web site ) 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「ZFS (IBM file system)」の詳細全文を読む スポンサード リンク
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