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Diffstat (limited to 'Documentation/filesystems/ocfs2.txt')
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diff --git a/Documentation/filesystems/ocfs2.txt b/Documentation/filesystems/ocfs2.txt new file mode 100644 index 0000000000000..f2595caf052e1 --- /dev/null +++ b/Documentation/filesystems/ocfs2.txt @@ -0,0 +1,55 @@ +OCFS2 filesystem +================== +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" and "ocfs2_hb_ctl". + +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/ + +All code copyright 2005 Oracle except when otherwise noted. + +CREDITS: +Lots of code taken from ext3 and other projects. + +Authors in alphabetical order: +Joel Becker <joel.becker@oracle.com> +Zach Brown <zach.brown@oracle.com> +Mark Fasheh <mark.fasheh@oracle.com> +Kurt Hackel <kurt.hackel@oracle.com> +Sunil Mushran <sunil.mushran@oracle.com> +Manish Singh <manish.singh@oracle.com> + +Caveats +======= +Features which OCFS2 does not support yet: + - sparse files + - extended attributes + - shared writeable mmap + - loopback is supported, but data written will not + be cluster coherent. + - quotas + - cluster aware flock + - Directory change notification (F_NOTIFY) + - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease) + - POSIX ACLs + - readpages / writepages (not user visible) + +Mount options +============= + +OCFS2 supports the following mount options: +(*) == default + +barrier=1 This enables/disables barriers. barrier=0 disables it, + barrier=1 enables it. +errors=remount-ro(*) Remount the filesystem read-only on an error. +errors=panic Panic and halt the machine if an error occurs. +intr (*) Allow signals to interrupt cluster operations. +nointr Do not allow signals to interrupt cluster + operations. |