The VERITAS File System, or VxFS, is an extent-based file system that was the first commercial journaling file system, and was developed by VERITAS Software. Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating system, although HP-UX calls it JFS. It is also supported on AIX, Linux, Solaris, SINIX/Reliant UNIX and UnixWare. VxFS was originally developed for AT&T's Unix System Laboratories. VxFS is packaged as a part of the VERITAS Foundation Suite (which also includes Veritas Volume Manager).

The on-disk layout of VxFS is versioned and upgradeable while the file system is mounted.

The version 5 on-disk layout of VxFS supports file systems up to 32 terabytes in size. Individual files can be up to 2 terabytes in size. Version 5 was introduced in VxFS 3.5.

The version 6 on-disk layout supports file systems and files up to 8 exabytes in size. Version 6 also introduced support for named streams/resource forks, for multiple underlying volumes, and for file change logs. Version 6 was introduced in VxFS 4.0.

See also

• ZFS, a similar product from Sun Microsystems
• Comparison of file systems

External links

• VERITAS Foundation Suite
• VxFS Quick Reference

Disk file systems

VxFS