gfs2_tool

gfs2_tool(8)                System Manager's Manual               gfs2_tool(8)



NAME
       gfs2_tool - interface to gfs2 ioctl/sysfs calls


SYNOPSIS
       gfs2_tool COMMAND [OPTION]...


DESCRIPTION
       gfs2_tool is an interface to a variety of the GFS2 ioctl/sysfs calls.
       Some of the functions of gfs_tool have been replaced by standard system
       tools such as mount and chattr, so gfs2_tool doesn't have as many
       options as gfs_tool used to.


COMMANDS
       clearflag Flag File1 File2 ...
              Clear an attribute flag on a file. This is now obsolete and kept
              only for backward compatibility, chattr is the preferred way to
              clear attribute flags. See setflag for available flags. This
              option will probably be removed at a future date.

       freeze MountPoint
              Freeze (quiesce) a GFS2 cluster.

       gettune MountPoint
              Print out the current values of the tuning parameters in a
              running filesystem. A better source of similar (more
              comprehensive) information is that in the /proc/mounts file.
              Running the mount command with no arguments will also provide
              the same information. This option is considered obsolete and
              will probably be removed at some future date.

       journals MountPoint
              Print out information about the journals in a mounted
              filesystem.

       lockdump MountPoint
              Print out information about the locks this machine holds for a
              given filesystem. This information is also available via the
              debugfs glock dump file, and accessing that file is the
              preferred method of obtaining a dump of the glock state.

       sb device proto [newvalue]
              View (and possibly replace) the name of the locking protocol in
              the file system superblock.  The file system shouldn't be
              mounted by any client when you do this.

       sb device table [newvalue]
              View (and possibly replace) the name of the locking table in the
              file system superblock.  The file system shouldn't be mounted by
              any client when you do this.

       sb device ondisk [newvalue]
              View (and possibly replace) the ondisk format number in the file
              system superblock.  The file system shouldn't be mounted by any
              client when you do this.  No one should have to use this.

       sb device multihost [newvalue]
              View (and possibly replace) the multihost format number in the
              file system superblock.  The file system shouldn't be mounted by
              any client when you do this.  No one should have to use this.

       sb device uuid [newvalue]
              View (and possibly replace) the uuid in the file system
              superblock.  The file system shouldn't be mounted by any client
              when you do this.  The new uuid value should be in the standard
              uuid format.  For example: 1AEA8269-15C5-72BD-6D83-8720B17AA4EE

       sb device all
              Print out the superblock.

       setflag Flag File1 File2 ...
              Set an attribute flag on a file.  The currently supported flags
              are jdata, immutable, appendonly, noatime, and sync.  The chattr
              command is the preferred way to set attributes on files. This
              option will probably be removed at a future date.

              The jdata flag causes all the data written to a file to be
              journaled.  If the jdata flag is set for a directory, all files
              and directories subsequently created within that directory are
              also journaled.  This behavior replaces the old inherit_jdata
              flag from gfs.  Same as chattr +j.

              The immutable flag marks the file immutable. The behavior is
              similar to the immutable flag in the ext2/3 filesystems.  All
              write access is denied.  Same as chattr +i.

              The appendonly flag causes all data to be written at the end of
              the file.  Same as chattr +a.

              The noatime flag disables updates to the file's access time.
              Same as chattr +A.

              The sync flag causes data written to the file to be sync'ed to
              stable storage immediately.  Same as chattr +S.

       settune MountPoint parameter newvalue
              Set the value of tuning parameter.  Use gettune for a listing of
              tunable parameters. The mount -oremount command is the preferred
              way to set the values of tunable parameters. At some future
              stage, when all parameters can be set via mount, this option
              will be removed.

       unfreeze MountPoint
              Unfreeze a GFS2 cluster.

       version
              Print out the version of GFS2 that this program goes with.

       withdraw MountPoint
              Cause GFS2 to abnormally shutdown a given filesystem on this
              node.  This feature is only useful for testing and should not be
              used during normal filesystem operation.




                                                                  gfs2_tool(8)