NAME

       gfs2_jadd - Add journals to a gfs2 filesystem

SYNOPSIS

       gfs2_jadd [options] <device|mountpoint> ...

DESCRIPTION

       gfs2_jadd  is  used to add journals (and a few other per-node files) to a gfs2 filesystem.
       When this operation is complete, the journal index is updated so  that  machines  mounting
       the  filesystem  will see the newly created journals in addition to the existing journals.
       Machines which are already running in the cluster are unaffected.

       gfs2_jadd must be run on a mounted filesystem. Adding journals to unmounted filesystems is
       not  supported.  gfs2_jadd need only be run on one node in the cluster; the added journals
       will be visible across the cluster.

       gfs2_jadd must be run as root. gfs2_jadd only updates the journal index at the end of  the
       process  if  no  error conditions are encountered, otherwise the filesystem is left in its
       original state.

OPTIONS

       -c megabytes
              Initial size of each journal's quota change file

       -D     Print out debugging information about the filesystem layout.

       -h     Prints out a short usage message and exits.

       -J size
              The size of the new journals in megabytes. The defaults to 32MB (the  minimum  size
              allowed  is  8MB). If journals of different sizes are required, gfs2_jadd will need
              to be run once for each different size of journal.

       -j number
              The number of new journals to add.

       -q     Be quiet.  Don't print anything.

       -V     Version. Print version information, then exit.

NOTES

       The journals added by gfs2_jadd are not guaranteed to be laid out contiguously as they are
       with  mkfs.gfs2(8). Therefore it may be beneficial to performance to create the filesystem
       with the required number of journals instead of adding journals later.

SEE ALSO

       mkfs.gfs2(8) gfs2_grow(8)

                                                                                     gfs2_jadd(8)