3 OCFS2 is a general purpose extent based shared disk cluster file
4 system with many similarities to ext3. It supports 64 bit inode
5 numbers, and has automatically extending metadata groups which may
6 also make it attractive for non-clustered use.
8 You'll want to install the ocfs2-tools package in order to at least
9 get "mount.ocfs2" and "ocfs2_hb_ctl".
11 Project web page: http://oss.oracle.com/projects/ocfs2
12 Tools web page: http://oss.oracle.com/projects/ocfs2-tools
13 OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
15 All code copyright 2005 Oracle except when otherwise noted.
18 Lots of code taken from ext3 and other projects.
20 Authors in alphabetical order:
21 Joel Becker <joel.becker@oracle.com>
22 Zach Brown <zach.brown@oracle.com>
23 Mark Fasheh <mark.fasheh@oracle.com>
24 Kurt Hackel <kurt.hackel@oracle.com>
25 Sunil Mushran <sunil.mushran@oracle.com>
26 Manish Singh <manish.singh@oracle.com>
30 Features which OCFS2 does not support yet:
33 - shared writable mmap
34 - loopback is supported, but data written will not
39 - Directory change notification (F_NOTIFY)
40 - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease)
42 - readpages / writepages (not user visible)
47 OCFS2 supports the following mount options:
50 barrier=1 This enables/disables barriers. barrier=0 disables it,
52 errors=remount-ro(*) Remount the filesystem read-only on an error.
53 errors=panic Panic and halt the machine if an error occurs.
54 intr (*) Allow signals to interrupt cluster operations.
55 nointr Do not allow signals to interrupt cluster
57 atime_quantum=60(*) OCFS2 will not update atime unless this number
58 of seconds has passed since the last update.
59 Set to zero to always update atime.