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

NAME

       gfs_jadd - Add journals to a GFS filesystem

SYNOPSIS

       gfs_jadd [OPTION]... <DEVICE|MOINTPOINT>...

DESCRIPTION

       gfs_jadd  is  used  to  add  journals  to  a  GFS filesystem after the device upon which the filesystem resides has been grown.	By running
       gfs_jadd on a GFS filesystem, you are filling in space between the current end of the filesystem and the end of the device upon	which  the
       filesystem resides.  When this operation is complete, the journal index is updated so that machines mounting the filesystem at a later date
       will see the newly created journals in addition to the journals already there. Machines which are already running in the cluster are  unaf-
       fected.

       gfs_jadd will not use space that has been formatted for filesystem data even if that space has never been populated with files.

       You  may  only  run gfs_jadd on a mounted filesystem, addition of journals to unmounted filesystems is not supported.  You only need to run
       gfs_jadd on one node in the cluster. All the other nodes will see the expansion has occurred when required.

       You must be superuser to execute gfs_jadd. The gfs_jadd tool tries to prevent you from corrupting your filesystem by checking  as  many	of
       the  likely  problems  as it can. When growing a filesystem, only the last step of updating the journal index affects the currently mounted
       filesystem and so failure part way through the expansion process should leave your filesystem in its original state.

       You can run gfs_jadd with the -Tv flags to get a display of the current state of a mounted GFS filesystem.  This can be useful to do  after
       the journal addition process to see if the changes have been successful.

OPTIONS

       -j num The number of new journals to add. This defaults to 1.

       -J size
	      The  size of the new journals in megabytes. The defaults to 128MB (the minimum size allowed is 32MB). If you want to add journals of
	      different sizes to the filesystem, you'll need to run gfs_jadd once for each different size of journal. The size	you  specify  here
	      will be rounded down so that it is a multiple of the journal segment size which was specified at filesystem creation time.

       -h     Help. Prints out a short usage message and exits.

       -q     Quiet. Turns down the verbosity level.

       -T     Test.  Do  all  calculations,  but do not write any data to the disk and do not add journals. This is used to discover what the tool
	      would have done were it run without this flag. You probably want to turn the verbosity level up in order to  gain  most  information
	      from this option.

       -V     Version. Print version information, then exit.

       -v     Verbose. Turn up verbosity of messages.

SEE ALSO

       mkfs.gfs(8) gfs_grow(8)

																       gfs_jadd(8)