Before Configuring Gfs - Red Hat GFS 6.0 Administrator's Manual

Chapter 1. Red Hat GFS Overview
Software Subsystem
GNBD
Upgrade
Table 1-1. GFS Software Subsystem Components
1.5. Before Configuring GFS
Before you install and configure GFS, note the following key characteristics of your GFS configura-
tion:
Cluster name
Determine a cluster name for your GFS cluster. The cluster name is required in the form of a pa-
rameter variable, ClusterName, later in this book.The cluster name can be 1 to 16 characters long.
For example, this book uses a cluster name alpha in some example configuration procedures.
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, FSName, later in this book. For example, this book uses file system names
and
gfs1 gfs2
Number of nodes
Determine how many nodes will mount the file systems. Note the hostname and IP address of
each node for use in configuration files later.
LOCK_GULM servers
Determine the number of LOCK_GULM servers. Multiple LOCK_GULM servers (available
with RLM) provide redundancy. RLM requires a minimum of three nodes, but no more than five
nodes. Information about LOCK_GULM servers is required for a CCS (Cluster Configuration
System) file,
cluster.ccs
tion about the
cluster.ccs
Components
gfs_fsck
gnbd.o
gnbd_serv.o
gnbd_export
gnbd_import
gfs_conf
in some example configuration procedures.
. Refer to Section 6.5 Creating the
file.
Description
Command that repairs an unmounted GFS
file system.
Kernel module that implements the GNBD
device driver on clients.
Kernel module that implements the GNBD
server. It allows a node to export local
storage over the network.
Command to create, export and manage
GNBDs on a GNBD server.
Command to import and manage GNBDs
on a GNBD client.
Command that retrieves from a cidev
configuration information from earlier
versions of GFS.
cluster.ccs
9
File for informa-