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Veritas File System : ウィキペディア英語版
Veritas File System

The VERITAS File System (or VxFS; called JFS and OnlineJFS in HP-UX) is an extent-based file system. It was originally developed by VERITAS Software.〔(【引用サイトリンク】title=Incrementally restoring a mass storage device to a prior state )〕 Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating system. With on-line defragmentation and resize support turned on via license, it is known as ''OnlineJFS''.
It is also supported on AIX, Linux, Solaris, OpenSolaris, SINIX/Reliant UNIX, UnixWare and SCO OpenServer. VxFS was originally developed for AT&T's Unix System Laboratories. VxFS is packaged as a part of the Veritas Storage Foundation (which also includes Veritas Volume Manager).
==History==
According to the vendor, it was the first commercial journaling file system.〔(【引用サイトリンク】title=VERITAS Foundation Suite and Foundation Suite HA 3.5 )
That claim can be taken in two ways, i.e., the first implementation of a journaling file system in a commercial context, or the first file system available as an unbundled product.
Dan Koren is cited as one of the original developers of VxFS.〔(【引用サイトリンク】title=6th International Linux Kongress )
He notes in a mailing list that they "finished release 1.0 one year or so later" after starting development of VxFS under a contract with AT&T Corporation in 1990. Other sources agree that the product was first released in 1991.
As the internet was not widely available in the early 1990s, getting a new file system deployed for Unix like operating systems was more difficult, so the one- to two-year delay in the release and commercialization of this file system was not unusual.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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