Red Hat GFS 6.0 -, Administrator'S Manual

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10 Chapter 1. Red Hat GFS Overview
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 use in configuration files later.
Fencing method
Determine the fencing method for each GFS node. If you are using GNBD multipath,
determine the fencing method for each GNBD server node (node that exports GNBDs to
GFS nodes). Information about fencing methods is required later in this book for the CCS
files,
fence.ccs
and
nodes.ccs
. (Refer to Section 6.6 Creating the
fence.ccs
File and
Section 6.7 Creating the
nodes.ccs
File for more information.) To help determine the type of
fencing methods available with GFS, refer to Chapter 10 Using the Fencing System . When
using RLM, you must use a fencing method that shuts down and reboots the node being fenced.
Storage devices and partitions
Determine the storage devices and partitions to be used for creating pool volumes in the file sys-
tems. Make sure to account for space on one or more partitions for storing cluster configuration
information as follows: 2 KB per GFS node or 2 MB total, whichever is larger.