This article is from the Frequently Asked Questions for Linux, the Free/Open Source UNIX-like operating system kernel that runs on many modern computer systems. Maintained by David C. Merrill with numerous contributions by others. (v1.0).
A: Linux actually supports several journalling file systems. ext3 is now included in current 2.4.x kernels.
A: The journalling file system named Reiserfs has just been released from testing. It is said to make Linux even faster than Linux with the Ext2 file system installed, particularly when dealing with many small files.
Complete information is available at http://devlinux.org/namesys/.
A: JFS is still under development.