Red Hat ENTERPRISE LINUX 4 - GLOBAL FILE SYTEM Manual page 24

Chapter 4. Managing GFS
LockProtoName
Specifies the name of the locking protocol (for example, lock_dlm) to use.
LockTableName
This parameter has two parts separated by a colon (no spaces) as follows:
ClusterName:FSName
• ClusterName, the name of the Red Hat cluster for which the GFS file system is being created.
• FSName, the file-system name, can be 1 to 16 characters long, and the name must be unique
among all file systems in the cluster.
Number
Specifies the number of journals to be created by the gfs_mkfs command. One journal is
required for each node that mounts the file system. (More journals than are needed can be
specified at creation time to allow for future expansion.)
BlockDevice
Specifies a volume.
Examples
In this example, lock_dlm is the locking protocol that the file system uses. The cluster name is
alpha, and the file-system name is gfs1. The file system contains eight journals and is created on /
dev/vg01/lvol0.
gfs_mkfs -p lock_dlm -t alpha:gfs1 -j 8 /dev/vg01/lvol0
In this example, a second lock_dlm file system is made, which can be used in cluster alpha. The
file-system name is gfs2. The file system contains eight journals and is created on /dev/vg01/
lvol1.
gfs_mkfs -p lock_dlm -t alpha:gfs2 -j 8 /dev/vg01/lvol1
Complete Options
Table 4.1, "Command Options: gfs_mkfs"
parameters).
Flag Parameter
-b BlockSize
-D
-h
-J MegaBytes
14
describes the gfs_mkfs command options (flags and
Description
Sets the file-system block size to BlockSize. Default
block size is 4096 bytes.
Enables debugging output.
Help. Displays available options.
Specifies the size of the journal in megabytes. Default
journal size is 128 megabytes. The minimum size is 32
megabytes.