1gfs2_jadd(8)                System Manager's Manual               gfs2_jadd(8)
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NAME

6       gfs2_jadd - Add journals to a gfs2 filesystem
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SYNOPSIS

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

14       gfs2_jadd is used to add journals (and a few other per-node files) to a
15       gfs2 filesystem.  When this operation is complete, the journal index is
16       updated  so  that  machines  mounting the filesystem will see the newly
17       created journals in addition to the existing journals.  Machines  which
18       are already running in the cluster are unaffected.
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20       gfs2_jadd  must  be run on a mounted filesystem. Adding journals to un‐
21       mounted filesystems is not supported. gfs2_jadd need only be run on one
22       node  in  the  cluster;  the  added journals will be visible across the
23       cluster.
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25       gfs2_jadd must be run as root. gfs2_jadd only updates the journal index
26       at  the end of the process if no error conditions are encountered, oth‐
27       erwise the filesystem is left in its original state.
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OPTIONS

31       -c megabytes
32              Initial size of each journal's quota change file
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34       -D     Print out debugging information about the filesystem layout.
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36       -h     Prints out a short usage message and exits.
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38       -J size
39              The size of the new journals in megabytes. The defaults to  32MB
40              (the  minimum  size  allowed  is  8MB). If journals of different
41              sizes are required, gfs2_jadd will need to be run once for  each
42              different size of journal.
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44       -j number
45              The number of new journals to add.
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47       -q     Be quiet.  Don't print anything.
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49       -V     Version. Print version information, then exit.
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NOTES

53       The  journals added by gfs2_jadd are not guaranteed to be laid out con‐
54       tiguously as they are with mkfs.gfs2(8). Therefore it may be beneficial
55       to  performance  to  create  the filesystem with the required number of
56       journals instead of adding journals later.
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SEE ALSO

60       mkfs.gfs2(8) gfs2_grow(8)
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