Veritas File System
| Full name | VERITAS File System |
|---|---|
| Introduced | 1991 |
| Structures | |
| Directory contents | extensible hash |
| Limits | |
| Max. volume size | 128 ZB (277 bytes) |
| Max. file size | 8 EB (263 bytes) |
| Max. filename length | 256 bytes |
| Features | |
| Forks | yes |
| Attributes | Extended file attributes |
| File system permissions | POSIX, ACL |
| Transparent compression | No |
| Transparent encryption | No |
| Other | |
| Supported operating systems | Linux, Solaris, HP-UX, AIX, SINIX, UnixWare |
The VERITAS File System (or VxFS; called JFS and OnlineJFS in HP-UX) is an extent-based file system. It was originally developed by VERITAS Software. Through an OEM agreement, VxFS is used as the primary filesystem of the HP-UX operating system. With on-line defragmentation and resize support turned on via license, it is known as OnlineJFS. It is also supported on AIX, Linux, Solaris, OpenSolaris, SINIX/Reliant UNIX, UnixWare and SCO OpenServer. VxFS was originally developed for AT&T's Unix System Laboratories. VxFS is packaged as a part of the Veritas Storage Foundation (which also includes Veritas Volume Manager).
According to the vendor, it was the first commercial journaling file system. That claim can be taken in two ways, i.e., the first implementation of a journaling file system in a commercial context, or the first file system available as an unbundled product.
Dan Koren is cited as one of the original developers of VxFS. He notes in a mailing list that they "finished release 1.0 one year or so later" after starting development of VxFS under a contract with AT&T Corporation in 1990. Other sources agree that the product was first released in 1991.
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