Red Hat GFS 5.2.1 -, Administrator'S Manual

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Appendix B.
Basic GFS Examples
This appendix contains examples of setting up and using GFS in the following basic scenarios:
•
Section B.1 LOCK_GULM, RLM Embedded
•
Section B.2 LOCK_GULM, RLM External
•
Section B.3 LOCK_GULM, SLM Embedded
•
Section B.4 LOCK_GULM, SLM External
•
Section B.5 LOCK_GULM, SLM External, and GNBD
•
Section B.6 LOCK_NOLOCK
The examples follow the process structure for procedures and associated tasks defined in Chapter 4
Initial Configuration .
B.1. LOCK_GULM, RLM Embedded
This example sets up a cluster with three nodes and two GFS file systems. It requires three nodes
for the GFS cluster. All nodes in the cluster mount the GFS file system and run the LOCK_GULM
servers.
This section provides the following information about the example:
•
Section B.1.1 Key Characteristics
•
Section B.1.2 Prerequisites
•
Section B.1.3 Setup Process
B.1.1. Key Characteristics
This example configuration has the following key characteristics:
•
Fencing device — An APC MasterSwitch (single-switch configuration). Refer to Table B-1 for
switch information.
•
Number of GFS nodes — 3. Refer to Table B-2 for node information.
•
Number of lock server nodes — 3. The lock servers are run on the GFS nodes (embedded). Refer
to Table B-2 for node information.
•
Locking protocol — LOCK_GULM. The LOCK_GULM server is run on every node that mounts
GFS.
•
Number of shared storage devices — 2. Refer to Table B-3 for storage device information.
•
Number of file systems — 2.
•
File system names —
gfs01
and
gfs02
.
•
File system mounting — Each GFS node mounts the two file systems.
•
Cluster name —
alpha
.