XFS Features:

Sub-second filesystem recovery after crashes or power failures (never wait for long fscks again)

64-bit scalability: millions of terabytes, millions of files, and a million files per directory (no more 2 GB limits)

High reliability and performance from journaling and other advanced algorithms

Source Code:

A complete linux 2.4.0-test1 tree including the XFS filesystem is available for cvs checkout.

The code is pre-Alpha quality and although the basic functionality is operational, it may hang, crash or do damage to your data.

Please refer to the  CVS instructions  for  details.

Further information:

At the Atlanta Linux Showcase, SGI presented the following paper on the port of XFS to Linux: 
• Porting the SGI XFS File System to Linux (October 1999)
At the 6th Linux Kongress & the Linux Storage Management Workshop (LSMW) in Germany in September, 1999, SGI had a few presentations including the following: 
• SGI's port of XFS to Linux (September 1999)
• Overview of DMF (September 1999)
At the LinuxWorld Conference & Expo in August 1999, SGI published:
• An Open Source XFS data sheet (August 1999)
• An IRIX-XFS data sheet (July 1999)
• Some initial XFS source code copylefted with the GNU GPL license (Selected IRIX XFS routines that implement XFS journaling) 
• Selected original 1993 XFS design documents 

An XFS white paper from the 1996 USENIX conference.
You can also check out the following:
• The Original XFS white paper, back from the early days it didn't yet have quota support. Yes, it has it now. 
• Press release #1: SGI Contributes World's Most Scalable File System Technology to Open Source Community 
• Some related discussions on the kernel mailing list. 
• A Linux World article
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