OCFS2
| Developer(s) | Oracle Corporation |
|---|---|
| Full name | Oracle Cluster File System |
| Introduced | 2006 with Linux 2.6.16 |
| Limits | |
| Max volume size | 4 PB (OCFS2)[1] |
| Max file size | 4 PB (OCFS2)[1] |
| Max filename length | 255 bytes |
| Allowed filename characters | All except NULL |
| Features | |
| Dates recorded |
|
| Other | |
| Supported operating systems | Linux |
OCFS stands for Oracle Cluster File System. It is a shared disk file system developed by Oracle Corporation and released under the GNU General Public License.
The first version of OCFS was developed with the main focus to accommodate oracle database files for clustered databases. Because of that it was not an POSIX compliant file system. With version 2 the POSIX features were included.
OCFS2 (version 2) was integrated into the version 2.6.16 of Linux kernel. Initially, it was marked as "experimental" (Alpha-test) code. This restriction was removed in Linux version 2.6.19. With kernel version 2.6.29 more features have been included into ocfs2 especially access control lists and quota.[2]
OCFS2 uses a distributed lock manager which resembles the OpenVMS DLM but is much simpler.[3]
See also
- Global File System (GFS)
- General Parallel File System (GPFS)
- List of file systems
- Lustre (file system)
- QFS
- Starfish
Notes and References
- ^ a b Currently limited to 16TiB since it uses the Linux JBD
- ^ http://thread.gmane.org/gmane.linux.kernel/775637
- ^ http://lwn.net/Articles/137278/
External links
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