Global File System
   A shared disk cluster filesystem for Linux that supports journaling and failure recovery. Source code, documentation, papers, and mailing list.
   http://www.redhat.com/software/rha/gfs/

IBM: GPFS
   General Parallel File System for AIX.
   http://www.almaden.ibm.com/StorageSystems/file_systems/GPFS/

Parallel Virtual File System
   A parallel file system for Linux clusters. Source code, manual, and papers.
   http://parlweb.parl.clemson.edu/pvfs/

Parallel Virtual File System, Version 2
   The next generation of Parallel Virtual File System. Source code, documentation, and mailing list.
   http://www.pvfs.org/

Proposal for a Common Parallel File System Programming Interface
   Paper about an API for parallel filesystems.
   http://www.cs.cmu.edu/~riedel/ftp/SIO/API/cmu-cs-96-193.abstract.html

RS/6000 SP Books: GPFS
   Documentation and papers.
   http://www.rs6000.ibm.com/resource/aix_resource/sp_books/gpfs/index.html

The Galley Parallel File System
   A filesystem designed for parallel computers. Description of file structure, papers, and source code.
   http://www.cs.dartmouth.edu/~nils/galley.html