Red Hat GLOBAL FILE SYSTEM 4.5 Manual page 42

Chapter 4. Managing GFS
The command is used to add journals to a GFS file system after the device where the
gfs_jadd
file system resides has been expanded. Running a
uses space between the current end of the file system and the end of the device where the file
system resides. When the fill operation is completed, the journal index is updated.
The command must be run on mounted file system, but it only needs to be run on one
gfs_jadd
node in the cluster. All the other nodes sense that the expansion has occurred.
To verify that the changes were successful, use the
(verbose) flags. Running the command with those flags displays the current state of the
-v
mounted GFS file system.
Usage
gfs_jadd -j Number MountPoint
Number
Specifies the number of new journals to be added.
MountPoint
Specifies the directory where the GFS file system is mounted.
Comments
Before running the
gfs_jadd
• Back up important data on the file system.
• Run a
gfs_tool df MountPoint
where journals will be added.
• Expand the underlying cluster volume with LVM. For information on administering LVM
volumes, see the LVM Administrator's Guide
After running the
gfs_jadd
enabled to check that the new journals have been added to the file system.
Examples
In this example, one journal is added to the file system on the
gfs_jadd -j1 /gfs1
30
command:
command to display the volume used by the file system
command, run a
gfs_jadd
command on a GFS file system
gfs_jadd
command with the
gfs_jadd
command with the
directory.
/gfs1
(test) and
-T
and flags
-T -v