OCFS2 is an extent-based cluster file system included in the Linux kernel.
It’s designed for shared-disk environments where multiple nodes need concurrent access to the same storage, while also being suitable for some non-clustered deployments. The kernel documentation highlights automatically extending metadata groups, journaling, and a broad set of mount options covering barriers, data ordering, coherency, allocation reservations, access-time handling, POSIX ACLs, and extended user attributes.
This is free and open source software.
Key Features
- Supports shared-disk clustered operation for Linux systems.
- Uses automatically extending metadata groups.
- Includes journaling with ordered and writeback data modes.
- Offers configurable coherency behaviour for cluster-aware I/O.
- Supports POSIX Access Control Lists and extended user attributes.
- Provides mount-time controls for barriers, atime handling, reservations, and error handling.
- Works with ocfs2-tools utilities such as mount.ocfs2 and ocfs2_hb_ctl.
Website: docs.kernel.org/filesystems/ocfs2.html
Support:
Developer: Oracle
License: GNU General Public License v2.0
OCFS2 is written in C. Learn C with our recommended free books and free tutorials.
Related Software
| Journaling File Systems | |
|---|---|
| Btrfs | Checksumming Copy on Write File system |
| ext4 | Evolved from ext3 adding many notable features including extents |
| XFS | Designed to maintain high performance with large files and file systems |
| F2FS | Flash file system initially developed by Samsung Electronics |
| OpenZFS | Advanced file system and volume manager originally developed for Solaris |
| GFS2 | Shared disk file system for Linux computer clusters |
| ext3 | Default file system for many popular Linux distributions |
| JFS | Journaled File System |
| UBIFS | File system for raw flash memory used through UBI volumes |
| OCFS2 | Extent-based cluster file system |
| JFFS2 | Log-structured flash file system designed for raw flash memory devices |
| Bcachefs | Advanced file system ejected from the mainline kernel |
| ScoutFS | Clustered file system designed for very large archival storage systems |
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