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authorLinus Torvalds <torvalds@g5.osdl.org>2006-01-05 23:43:11 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-05 23:43:11 -0500
commit29552b1462799afbe02af035b243e97579d63350 (patch)
tree42ad1639678a1bc8064f690494f62497bc48d318 /Documentation/filesystems/ocfs2.txt
parent6c59f9d9fb95934bf3d7d64249b338ce79953b5b (diff)
parent51e7a5987058c6b4d0c1337587f2ec0c34ffa708 (diff)
Merge http://oss.oracle.com/git/ocfs2
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1OCFS2 filesystem
2==================
3OCFS2 is a general purpose extent based shared disk cluster file
4system with many similarities to ext3. It supports 64 bit inode
5numbers, and has automatically extending metadata groups which may
6also make it attractive for non-clustered use.
7
8You'll want to install the ocfs2-tools package in order to at least
9get "mount.ocfs2" and "ocfs2_hb_ctl".
10
11Project web page: http://oss.oracle.com/projects/ocfs2
12Tools web page: http://oss.oracle.com/projects/ocfs2-tools
13OCFS2 mailing lists: http://oss.oracle.com/projects/ocfs2/mailman/
14
15All code copyright 2005 Oracle except when otherwise noted.
16
17CREDITS:
18Lots of code taken from ext3 and other projects.
19
20Authors in alphabetical order:
21Joel Becker <joel.becker@oracle.com>
22Zach Brown <zach.brown@oracle.com>
23Mark Fasheh <mark.fasheh@oracle.com>
24Kurt Hackel <kurt.hackel@oracle.com>
25Sunil Mushran <sunil.mushran@oracle.com>
26Manish Singh <manish.singh@oracle.com>
27
28Caveats
29=======
30Features which OCFS2 does not support yet:
31 - sparse files
32 - extended attributes
33 - shared writeable mmap
34 - loopback is supported, but data written will not
35 be cluster coherent.
36 - quotas
37 - cluster aware flock
38 - Directory change notification (F_NOTIFY)
39 - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease)
40 - POSIX ACLs
41 - readpages / writepages (not user visible)
42
43Mount options
44=============
45
46OCFS2 supports the following mount options:
47(*) == default
48
49barrier=1 This enables/disables barriers. barrier=0 disables it,
50 barrier=1 enables it.
51errors=remount-ro(*) Remount the filesystem read-only on an error.
52errors=panic Panic and halt the machine if an error occurs.
53intr (*) Allow signals to interrupt cluster operations.
54nointr Do not allow signals to interrupt cluster
55 operations.