2005-12-15 15:31:24 -07:00
|
|
|
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
|
2006-11-29 20:58:40 -07:00
|
|
|
- shared writable mmap
|
2005-12-15 15:31:24 -07:00
|
|
|
- loopback is supported, but data written will not
|
|
|
|
|
be cluster coherent.
|
|
|
|
|
- quotas
|
|
|
|
|
- cluster aware flock
|
2006-01-11 14:55:00 -07:00
|
|
|
- cluster aware lockf
|
2005-12-15 15:31:24 -07:00
|
|
|
- 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.
|
2006-12-04 19:09:17 -07:00
|
|
|
atime_quantum=60(*) OCFS2 will not update atime unless this number
|
|
|
|
|
of seconds has passed since the last update.
|
|
|
|
|
Set to zero to always update atime.
|
