[TUHS] Re: AIX moved into maintainance mode

[Jim Carpenter <jim@deitygraveyard.com>]

On Wed, Jan 18, 2023 at 4:20 PM Theodore Ts'o <tytso@mit.edu> wrote:
> Just coincidentally, there is currently discussion in Linux kernel
> circles about whether it's time to drop support for JFS.  JFS was
> originally from OS/2 and then ported to Linux and AIX, although JFS
> for Linux and JFS2 for AIX have diverged.  JFS has been in maintenance
> mode in 2008, and the number of users is close to zero at this point.

Well the original JFS was introduced with AIX 3.1 in 1990. A new JFS
started from that and was introduced with an OS/2 in 1999 and made
its way back to AIX.

From the 12/16/2002 JFS mini-FAQ:

Q1. What is the history of the source based use for the port of JFS for Linux.

A1. IBM introduced its UNIX file system as the Journaled File System (JFS)
    with the initial release of AIX Version 3.1.  This file system, now
    called JFS1 on AIX, has been the premier file system for AIX over the
    last 10 years and has been installed in millions of customer's AIX
    systems.  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.

    Historically, the JFS1 file system is very closely tied to the memory
    manager of AIX.  This design is typical of a closed-source operating
    system, or a file system supporting only one operating system.

    The new Journaled File System, on which the Linux port was based, was
    first shipped in OS/2 Warp Server for eBusiness in April, 1999, after
    several years of designing, coding, and testing.  It also shipped with
    OS/2 Warp Client in October, 2000.  In parallel to 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.  In December of 1999, a snapshot of the original OS/2 JFS
    source was taken and work was begun to port JFS to Linux.


Jim