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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 deleted file mode 100644 index 4c49e5410595..000000000000 --- a/Documentation/filesystems/ocfs2.txt +++ /dev/null @@ -1,106 +0,0 @@ -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://ocfs2.wiki.kernel.org -Tools git tree: https://github.com/markfasheh/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 <mfasheh@suse.com> -Kurt Hackel <kurt.hackel@oracle.com> -Tao Ma <tao.ma@oracle.com> -Sunil Mushran <sunil.mushran@oracle.com> -Manish Singh <manish.singh@oracle.com> -Tiger Yang <tiger.yang@oracle.com> - -Caveats -======= -Features which OCFS2 does not support yet: - - Directory change notification (F_NOTIFY) - - Distributed Caching (F_SETLEASE/F_GETLEASE/break_lease) - -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. -noatime Do not update access time. -relatime(*) Update atime if the previous atime is older than - mtime or ctime -strictatime Always update atime, but the minimum update interval - is specified by atime_quantum. -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. This option need - work with strictatime. -data=ordered (*) All data are forced directly out to the main file - system prior to its metadata being committed to the - journal. -data=writeback Data ordering is not preserved, data may be written - into the main file system after its metadata has been - committed to the journal. -preferred_slot=0(*) During mount, try to use this filesystem slot first. If - it is in use by another node, the first empty one found - will be chosen. Invalid values will be ignored. -commit=nrsec (*) Ocfs2 can be told to sync all its data and metadata - every 'nrsec' seconds. The default value is 5 seconds. - This means that if you lose your power, you will lose - as much as the latest 5 seconds of work (your - filesystem will not be damaged though, thanks to the - journaling). This default value (or any low value) - will hurt performance, but it's good for data-safety. - Setting it to 0 will have the same effect as leaving - it at the default (5 seconds). - Setting it to very large values will improve - performance. -localalloc=8(*) Allows custom localalloc size in MB. If the value is too - large, the fs will silently revert it to the default. -localflocks This disables cluster aware flock. -inode64 Indicates that Ocfs2 is allowed to create inodes at - any location in the filesystem, including those which - will result in inode numbers occupying more than 32 - bits of significance. -user_xattr (*) Enables Extended User Attributes. -nouser_xattr Disables Extended User Attributes. -acl Enables POSIX Access Control Lists support. -noacl (*) Disables POSIX Access Control Lists support. -resv_level=2 (*) Set how aggressive allocation reservations will be. - Valid values are between 0 (reservations off) to 8 - (maximum space for reservations). -dir_resv_level= (*) By default, directory reservations will scale with file - reservations - users should rarely need to change this - value. If allocation reservations are turned off, this - option will have no effect. -coherency=full (*) Disallow concurrent O_DIRECT writes, cluster inode - lock will be taken to force other nodes drop cache, - therefore full cluster coherency is guaranteed even - for O_DIRECT writes. -coherency=buffered Allow concurrent O_DIRECT writes without EX lock among - nodes, which gains high performance at risk of getting - stale data on other nodes. -journal_async_commit Commit block can be written to disk without waiting - for descriptor blocks. If enabled older kernels cannot - mount the device. This will enable 'journal_checksum' - internally. |