Designing Disaster Tolerant High Availability Clusters, 10th Edition, March 2003 (B7660-90013)

Building a Metropolitan Cluster Using MetroCluster/SRDF
Setting up 1 by 1 Configurations
Chapter 4 153
Setting up 1 by 1 Configurations
The most common Symmetrix configuration used with
MetroCluster/SRDF is a 1 by 1 configuration in which there is a single
Symmetrix frame at each Data Center. This section describes how to set
up this configuration using SymCLI and HP-UX commands. It is
assumed that you have already set up the Symmetrix CLI database on
each node as described in the previous section, “Preparing a Cluster for
MetroCluster/SRDF.”
A basic 1 by 1 configuration is shown in Figure 4-18, which is a graphical
view of the data in Table 4-6.
Figure 4-18 Mapping HP-UX Device File Names to Symmetrix Units
Creating Symmetrix Device Groups
A single Symmetrix device group must be defined for each package on
each node that is connected to the Symmetrix. The following procedure
must be done on each node that may potentially run the package:
NOTE The sample scripts mk3symgrps.nodename can be modified to automate
these steps.
Symmetrix ID 95
Data Center A
Node 1
R1
R2
SRDF
GK
Node 2
BCV
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d
s
k
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4
t
3
d
2
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6
t
0
d
0
/
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0
t
1
5
d
0
/
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0
t
2
d
2
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0
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4
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0
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4
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2
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1
5
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0
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ev
/
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d
s
k
/
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4
t
3
d
2
Symmetrix ID 50
Data Center B
Node 3
R2
R1
GK
Node 4
/
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c
4
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3
d
2
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3
t
1
5
d
1
/
d
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c
4
t
0
d
0
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3
t
0
d
2
/
d
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k
/
c
0
t
4
d
0
/
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/
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5
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1
5
d
1