In Red Hat Linux 7.2, Red Hat provides its first officially supported journaling file system: ext3. The ext3 file system is a set of incremental enhancements to the robust ext2 file system that provide several advantages. This paper summarizes some of those advantages (first in general terms and then more specifically), explains what Red Hat has done to test the ext3 file system, and (for advanced users only) touches on tuning.

Source: www.redhat.com/resourcelibrary/whitepapers/ext3