The XFS(tm) Filesystem from Silicon Graphics, Inc.
XFS is a highly scalable, high-performance journaling filesystem that provides
rapid recovery from system crashes.
Refer to the documentation at http://oss.sgi.com/projects/xfs/
for complete details.

Kernel modules for xfs are in kernel-module-xfs rpms.

The xfsdump package contains xfsdump, xfsrestore and a number of
other utilities for administering XFS filesystems.

The xfsprogs package contains a set of commands to use 
the XFS filesystem, including mkfs.xfs.

xfs and the kernel modules have been provided by Urs Beyerle.
xfsdump and xfsprogs are from CentOS extra's.