[ASK] decrease/shrink the size of filesystem

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LEARN ABOUT DEBIAN

gfs2_jadd

gfs2_jadd(8)						      System Manager's Manual						      gfs2_jadd(8)

NAME

       gfs2_jadd - Add journals to a GFS2 filesystem

SYNOPSIS

       gfs2_jadd [OPTION]... <DEVICE|MOINTPOINT>...

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 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 unaffected.

       You  may  only run gfs2_jadd on a mounted filesystem, addition of journals to unmounted filesystems is not supported.  You only need to run
       gfs2_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 gfs2_jadd. The gfs2_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.

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 you want to  add  journals	of
	      different sizes to the filesystem, you'll need to run gfs2_jadd once for each different size of journal.

       -j num The number of new journals to add.

       -q     Be quiet.  Don't print anything.

       -u MegaBytes
	      Initial size of each journal's unlinked tag file

       -V     Version. Print version information, then exit.

SEE ALSO

       mkfs.gfs2(8) gfs2_grow(8)

																      gfs2_jadd(8)

AIX