Red Hat GLOBAL FILE SYSTEM 4.5 Manual page 43

In this example, two journals are added to the file system on the
gfs_jadd -j2 /gfs1
In this example, the current state of the file system on the
new journals.
gfs_jadd -Tv /gfs1
Complete Usage
gfs_jadd [Options] {MountPoint | Device} [MountPoint | Device]
MountPoint
Specifies the directory where the GFS file system is mounted.
Device
Specifies the device node of the file system.
Table 4.4, "GFS-specific Options Available When Adding Journals"
options that can be used when adding journals to a GFS file system.
Flag Parameter
-h
-J MegaBytes
-j Number
-T
/gfs1
Description
Help. Displays short usage message.
Specifies the size of the new journals in megabytes.
Default journal size is 128 megabytes. The minimum
size is 32 megabytes. To add journals of different
sizes to the file system, the
must be run for each size journal. The size specified
is rounded down so that it is a multiple of the
journal-segment size that was specified when the file
system was created.
Specifies the number of new journals to be added by
the command. The default value is 1.
gfs_jadd
Test. Do all calculations, but do not write any data to
the disk and do not add journals to the file system.
Enabling this flag helps discover what the
command would have done if it were run without this
flag. Using the flag with the
-v
Complete Usage
directory.
/gfs1
directory is checked for the
describes the GFS-specific
command
gfs_jadd
gfs_jadd
flag turns up the
-T
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