Editing JFS (file system) (section)

== History ==
IBM introduced JFS with the initial release of AIX version 3.1 in February 1990. This file system, now called ''JFS1 on AIX'', was the premier file system for AIX over the following decade and was installed in thousands or millions of customers' AIX systems. Historically, the JFS1 file system is very closely tied to the memory manager of AIX,<ref name="faq" /> which is a typical design for a file system supporting only one operating system. JFS was one of the first file systems to support [[Journaling file system|Journaling]].

In 1995, work began to enhance the file system to be more scalable and to support machines that had more than one processor. Another goal was to have a more portable file system, capable of running on multiple operating systems. After several years of designing, coding, and testing, the new JFS was first shipped in OS/2 Warp Server for eBusiness in April 1999, and then in OS/2 Warp Client in October 2000. In December 1999, a snapshot of the original OS/2 JFS source was granted to the [[Open-source model|open source]] community and work was begun to port JFS to [[Linux]]. The first stable release of ''JFS for Linux'' appeared in June 2001.<ref name="interview" /> The ''JFS for Linux'' project is maintained by a small group of contributors known as the ''JFS Core Team''.<ref name="JFS4Linux">{{cite web |url=http://jfs.sourceforge.net/ |title=JFS for Linux |website=JFS.SourceForge.net |access-date=August 26, 2020}}</ref> This release of sources also worked to form the basis of a re-port back to OS/2 of the open-source JFS.

In parallel with this effort, some of the JFS development team returned to the AIX Operating System Development Group in 1997 and started to move this new JFS source base to the AIX operating system.  In May 2001, a second journaled file system, ''Enhanced Journaled File System (JFS2)'', was made available for AIX 5L.<ref name="faq" /><ref name="interview" />

Early in 2008 there was speculation that IBM is no longer interested in maintaining JFS and thus it should not be used in production environments.<ref>{{Cite web |url=http://linux.derkeiler.com/Mailing-Lists/Debian/2008-01/msg01808.html |title=Re: which to use: ext3, JFS, XFS, ReiserFS?<!-- Bot generated title --> |access-date=March 31, 2008 |archive-url=https://web.archive.org/web/20160303200517/http://linux.derkeiler.com/Mailing-Lists/Debian/2008-01/msg01808.html |archive-date=March 3, 2016 |url-status=dead }}</ref> However, Dave Kleikamp, a member of the [[IBM Linux Technology Center]] and JFS Core Team,<ref name="JFS4Linux" /> explained that they still follow changes in the [[Linux kernel]] and try to fix potential [[software bugs]]. He went on to add that certain distributions expect a larger resource commitment from them and opt not to support the filesystem.<ref>[http://sourceforge.net/mailarchive/forum.php?thread_name=fpps5p%24g2t%242%40saturn.local.net&forum_name=jfs-discussion SourceForge.net: jfs-discussion<!-- Bot generated title -->]</ref>

In 2012, [[Trim (computing)|TRIM]] command support for [[solid-state drive]]s was added to JFS.<ref>{{cite web|title=TRIM support for JFS Filesystem|url=https://lkml.org/lkml/2012/7/26/691}}</ref>