Adding Journals To A File System - Red Hat ENTERPRISE LINUX 4 - GLOBAL FILE SYTEM Manual

Device
Specifies the device node of the file system.
Table 4.3, "GFS-specific Options Available While Expanding A File System"
specific options that can be used while expanding a GFS file system.
Option
-h
-q
-T
-V
-v
Table 4.3. GFS-specific Options Available While Expanding A File System

4.6. Adding Journals to a File System

The gfs_jadd command is used to add journals to a GFS file system after the device where the
file system resides has been expanded. Running a gfs_jadd command on a GFS file system 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 gfs_jadd command must be run on mounted file system, but it only needs to be run on one
node in the cluster. All the other nodes sense that the expansion has occurred.
To verify that the changes were successful, use the gfs_jadd command with the -T (test) and -v
(verbose) flags. Running the command with those flags displays the current state of the 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 command:
• Back up important data on the file system.
• Run a gfs_tool df MountPoint command to display the volume used by the file system where
journals will be added.
• Expand the underlying cluster volume with LVM. For information on administering LVM volumes, see
the LVM Administrator's Guide
Description
Help. Displays a short usage message.
Quiet. Turns down the verbosity level.
Test. Do all calculations, but do not write any data to the disk and do
not expand the file system.
Displays command version information.
Turns up the verbosity of messages.
Adding Journals to a File System
describes the GFS-
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