xenial (8) tunefs.ocfs2.8.gz

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.