NAME¶
tunefs.ocfs2 - Change
OCFS2 file system parameters.
SYNOPSIS¶
tunefs.ocfs2 [
--cloned-volume[=
new-label]
[
--fs-features= list-of-features] [
-J
journal-options] [
-L volume-label] [
-N
number-of-node-slots] [
-Q query-format]
[
-ipqnSUvVy] [
--backup-super] [
--list-sparse]
device [
blocks-count]
DESCRIPTION¶
tunefs.ocfs2 is used to adjust
OCFS2 file system parameters on
disk. The tool expects the cluster to be online as it needs to take the
appropriate cluster locks to write safely to disk.
OPTIONS¶
- --cloned-volume[=new-label]
- Change the volume UUID (auto-generated) and the label, if provided, of a
cloned OCFS2 volume. This option does not perform volume
cloning. It only changes the UUID and label on a cloned volume so that it
can be mounted on the node that has the original volume mounted.
- --fs-features=[no]sparse...
- Turn specific file system features on or off. tunefs.ocfs2 will
attempt to enable or disable the feature list provided. To enable a
feature, include it in the list. To disable a feature, prepend no
to the name. For a list of feature names, see the man page for
mkfs.ocfs2.
- -J, --journal-options options
- Modify the journal using options specified on the command-line. Journal
options are comma separated, and may take an argument using the equals
('=') sign. For a list of possible options, see the man page for
mkfs.ocfs2.
- -L, --label volume-label
- Change the volume label of the file system. Limit the label to under 64
bytes.
- -N, --node-slots number-of-node-slots
- Valid number ranges from 1 to 255. This number specifies the maximum
number of nodes that can concurrently mount the partition. Use this to
increase or decrease the number of node slots. One reason to decrease
could be to release the space consumed by the journals for those slots.
- -S, --volume-size
- Grow the size of the OCFS2 file system. If blocks-count is
not specified, tunefs.ocfs2 extends the volume to the current size
of the device.
- -Q, --query query-format
- Query the file system for its attributes like block size, label, etc.
Query formats are modified versions of the standard printf(3) formatting.
The format is made up of static strings (which may include standard C
character escapes for newlines, tabs, and other special characters) and
printf(3) type formatters. The list of type specifiers is as follows:
- B Block size in bytes
- T Cluster size in bytes
- N Number of node slots
- R Root directory block number
- Y System directory block number
- P First cluster group block number
- V Volume label
- U Volume uuid
- M Compat flags
- H Incompat flags
- O RO Compat flags
- -q, --quiet
- Quiet mode.
- -U, --uuid-reset[=new-uuid]
- Set the volume UUID for the file system. If not provided, will auto
generate a new UUID. The format of the provided UUID should be
178BDC83D50241EF94EB474A677D498B or 178BDC83-D502-41EF-94EB-474A677D498B.
- -v, --verbose
- Verbose mode.
- -V, --version
- Show version and exit.
- -y, --yes
- Always answer Yes in interactive command line.
- -n, --no
- Always answer No in interactive command line.
- --backup-super
- Backs up the superblock to fixed offsets (1G, 4G, 16G, 64G, 256G and 1T)
on disk. This option is useful for users to backup the superblock on
volumes that the user either explicitly disallowed while formatting, or,
used a version of mkfs.ocfs2 (1.2.2 or older) that did not provide
this facility.
- --list-sparse
- Lists the files having holes. This option is useful when disabling the
sparse feature.
- --update-cluster-stack
- Updating on-disk cluster information to match the running cluster.
- blocks-count
- During resize, tunefs.ocfs2 automatically determines the size of
the given device and grows the file system such that it uses all of the
available space on the device. This optional argument specifies that the
file system should be extended to consume only the given number of file
system blocks on the device.
EXAMPLES¶
[root@node1 ~]# tunefs.ocfs2 -Q "UUID = %U\nNumSlots = %N\n" /dev/sda1
UUID = CBB8D5E0C169497C8B52A0FD555C7A3E
NumSlots = 4
SEE ALSO¶
mkfs.ocfs2(8) fsck.ocfs2(8) debugfs.ocfs2(8)
mounted.ocfs2(8) ocfs2console(8) o2cb(7)
AUTHORS¶
Oracle Corporation
COPYRIGHT¶
Copyright © 2004, 2010 Oracle. All rights reserved.