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.


COMMANDS
       clearflag Flag File1 File2 ...
              Clear an attribute flag on a file. See setflag for available
              flags.

       counters MountPoint [-c]
              Print out statistics about a filesystem.  If -c is used,
              gfs2_tool continues to run printing out the stats once a second.

       freeze MountPoint
              Freeze (quiesce) a GFS2 cluster.

       getargs MountPoint
              Get the GFS-specific mount arguments used to mount a filesystem.

       gettune MountPoint
              Print out the current values of the tuning parameters in a
              running filesystem.

       list   List the currently mounted GFS2 filesystems.  Each line
              represents a filesystem.  The columns represent (in order): 1)
              An identifier that represents the mounted filesystem. 2) The
              name of the device that holds the filesystem (well, the name as
              the Linux kernel knows it).

       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 all
              Print out the superblock.

       setflag Flag File1 File2 ...
              Set an attribute flag on a file.  There are eight currently
              supported flags.  They are jdata, directio, immutable,
              appendonly, noatime, sync, inherit_jdata, and inherit_directio.

              The jdata flag causes all the data written to a regular file to
              be journaled. The jdata flag can only be set (or cleared) if the
              file is zero length.

              The directio flag causes all I/O to a regular file to be Direct
              I/O, even if the O_DIRECT flag isn't used on the open() command.

              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.

              The appendonly flag causes all data to be written at the end of
              the file.

              The noatime flag disables updates to the file's access time.

              The sync flag causes data written to the file to be sync'ed to
              stable storage immediately.

              The inherit_jdata flag is set on a directory.  It causes all new
              regular files created in that directory automatically inherit
              the jdata flag.  The inherit_jdata is also inherited by any new
              subdirectories created in that directory.

              The inherit_directio flag is set on a directory.  It causes all
              new regular files created in that directory automatically
              inherit the directio flag.  The inherit_directio is also
              inherited by any new subdirectories created in that directory.

       settune MountPoint parameter newvalue
              Set the value of tuning parameter.  Use gettune for a listing of
              tunable parameters.

       shrink MountPoint
              Causes any unused locks to be thrown out of memory.

       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.




                                                                  gfs2_tool(8)