OCFS2 is a general purpose extent based shared disk cluster file system with many similarities to ext3. It supports 64 bit inode numbers, and has automatically extending metadata groups which may also make it attractive for non-clustered use. You'll want to install the ocfs2-tools package in order to at least get "mount.ocfs2". Project web page: http://oss.oracle.com/projects/ocfs2 Tools web page: http://oss.oracle.com/projects/ocfs2-tools OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/ For more information on OCFS2, see the file <file:Documentation/filesystems/ocfs2.txt>.
OCFS2 includes a simple kernelspace clustering package, the OCFS2 Cluster Base. It only requires a very small userspace component to configure it. This comes with the standard ocfs2-tools package. O2CB is limited to maintaining a cluster for OCFS2 file systems. It cannot manage any other cluster applications. It is always safe to say Y here, as the clustering method is run-time selectable.
This option will allow OCFS2 to use userspace clustering services in conjunction with the DLM in fs/dlm. If you are using a userspace cluster manager, say Y here. It is safe to say Y, as the clustering method is run-time selectable.
This option allows some fs statistics to be captured. Enabling this option may increase the memory consumption.
The ocfs2 filesystem has an extensive logging system. The system allows selection of events to log via files in /sys/o2cb/logmask/. This option will enlarge your kernel, but it allows debugging of ocfs2 filesystem issues.
This option will enable expensive consistency checks. Enable this option for debugging only as it is likely to decrease performance of the filesystem.