Red Hat GFS 6.1 -, Administrator'S Manual

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Chapter 1. GFS Overview 9
Software
Subsystem
Components Description
gnbd_serv
A server daemon that allows a node to
export local storage over the network.
Table 1-1. GFS Software Subsystem Components
1.5. 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.
Journals
Determine the number of journals for your GFS file systems. One journal is required
for each node that mounts a GFS file system. Make sure to account for additional
journals needed for future expansion.
GFS nodes
Determine which nodes in the Red Hat Cluster Suite will mount the GFS file systems.
GNBD server nodes
If you are using GNBD, determine how many GNBD server nodes are needed. Note
the hostname and IP address of each GNBD server node for setting up GNBD clients
later.
Storage devices and partitions
Determine the storage devices and partitions to be used for creating logical volumes
(via CLVM) in the file systems.