Before Setting Up Gfs; Gfs Software Subsystem Components - Red Hat ENTERPRISE LINUX 4 - GLOBAL FILE SYTEM Manual

Software Subsystem
Table 1.1. GFS Software Subsystem Components

1.4. Before Setting Up GFS

Before you install and set up GFS, note the following key characteristics of your GFS file systems:
Number of file systems
Determine how many GFS file systems to create initially. (More file systems can be added later.)
File-system name
Determine a unique name for each file system. Each file-system name is required in the form of
a parameter variable. For example, this book uses file-system names gfs1 and gfs2 in some
example procedures.
Components
gfs_fsck
gfs_grow
gfs_jadd
gfs_mkfs
gfs_quota
gfs_tool
lock_harness.ko
lock_dlm.ko
lock_gulm.ko
lock_nolock.ko
Description
Command that repairs an unmounted GFS
file system.
Command that grows a mounted GFS file
system.
Command that adds journals to a mounted
GFS file system.
Command that creates a GFS file system
on a storage device.
Command that manages quotas on a
mounted GFS file system.
Command that configures or tunes a
GFS file system. This command can also
gather a variety of information about the file
system.
Implements a pluggable lock module
interface for GFS that allows for a variety
of locking mechanisms to be used
(for example, the DLM lock module,
lock_dlm.ko).
A lock module that implements DLM locking
for GFS. It plugs into the lock harness,
lock_harness.ko and communicates
with the DLM lock manager in Red Hat
Cluster Suite.
A lock module that implements GULM
locking for GFS. It plugs into the lock
harness, lock_harness.ko and
communicates with the GULM lock
manager in Red Hat Cluster Suite.
A lock module for use when GFS is used as
a local file system only. It plugs into the lock
harness, lock_harness.ko and provides
local locking.
Before Setting Up GFS
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