Red Hat GFS 6.0 -, Administrator'S Manual

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154 Appendix C. Basic GFS Examples
C.4. LOCK_GULM, SLM External
This example sets up a cluster with three nodes and two GFS file systems. It requires three nodes for
the GFS cluster and an additional (external) node to run the LOCK_GULM server.
This section provides the following information about the example:
•
Section C.4.1 Key Characteristics
•
Section C.4.2 Kernel Modules Loaded
•
Section C.4.3 Setup Process
C.4.1. Key Characteristics
This example configuration has the following key characteristics:
•
Fencing device — An APC MasterSwitch (single-switch configuration). Refer to Table C-11 for
switch information.
•
Number of GFS nodes — 3. Refer to Table C-12 for node information.
•
Number of lock server nodes — 1. The lock server is run on one of the GFS nodes (embedded).
Refer to Table C-13 for node information.
•
Locking protocol — LOCK_GULM. The LOCK_GULM server is run on the node that is desig-
nated as a lock server node.
•
Number of shared storage devices — 2. Refer to Table C-14 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
.
Host Name IP Address Login Name Password
apc 10.0.1.10 apc apc
Table C-11. APC MasterSwitch Information
Host Name IP Address APC Port Number
n01 10.0.1.1 1
n02 10.0.1.2 2
n03 10.0.1.3 3
Table C-12. GFS Node Information
Host Name IP Address APC Port Number
lcksrv 10.0.1.4 4
Table C-13. Lock Server Node Information