Red Hat GFS 5.2.1 -, Administrator'S Manual

Page: 85 / 192

Chapter 7.
Using the Cluster Configuration System
This chapter describes how to use the cluster configuration system (CCS) and consists of the following
sections:
•
Section 7.1 Creating a CCS Archive
•
Section 7.2 Starting CCS in the Cluster
•
Section 7.3 Using Other CCS Administrative Options
•
Section 7.4 Changing CCS Configuration Files
•
Section 7.5 Alternative Methods to Using a CCA Device
•
Section 7.6 Combining CCS Methods
Note
If your GFS cluster is configured for GNBD multipath, there are some considerations you must take
into account for the location of CCS files. Refer to Section 11.1 Considerations for Using GNBD
Multipath .
7.1. Creating a CCS Archive
A CCS archive is a collection of CCS configuration files that can be accessed by the cluster. The
ccs_tool
command is used to create a CCS archive from a directory containing
.ccs
configuration
files. This command writes the archive to a shared pool called the CCA device .
A small pool volume may be used as the CCA device. You can determine the size of the CCA device
pool volume as follows: 2 KB per GFS node or 2 MB total, whichever is larger. (Refer to Section 5.5
Creating a Pool Volume and Section 5.6 Activating/Deactivating a Pool Volume for details on creating
and activating a pool volume for the CCA device.)
7.1.1. Usage
ccs_tool create Directory CCADevice
Directory
The relative path to the directory containing the CCS files for the cluster.
CCADevice
Specifies the name of the CCA device.