Managing Serviceguard Eighteenth Edition, September 2010

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Disk Group Name: ______dg01_____________________
Disk Name: _____________________c1t2d0__________________________
Disk Name: _____________________c2t2d0__________________________
Disk Name: _____________________c3t2d0__________________________
Disk Name: _____________________________________________________
CFS DG Package Name: ___________SG-CFS-DG_1_____
CFS Volume, MP, and MP Pkg: _logdata_/mnt/lvol1_ SG-CFS-MP_1______
CFS Volume, MP, and MP Pkg: ______________________________________
Disk Group Name: ______dg02______________________
Disk Name: _____________________c1t3d0__________________________
Disk Name: _____________________c2t3d0__________________________
Disk Name: _____________________c3t3d0__________________________
CFS DG Package Name: ___________SG-CFS-DG_2_____
CFS Volume, MP, and MP Pkg: _hrdata__/mnt/lvol4_ SG-CFS-MP_2____
CFS Volume, MP, and MP Pkg: ____________________________________
Cluster Configuration Planning
A cluster should be designed to provide the quickest possible recovery from failures.
The actual time required to recover from a failure depends on several factors:
• The value of the cluster MEMBER_TIMEOUT.
See MEMBER_TIMEOUT under “Cluster Configuration Parameters ” (page 143)
for recommendations.
• The availability of raw disk access. Applications that use raw disk access should
be designed with crash recovery services.
• The application and database recovery time. They should be designed for the
shortest recovery time.
In addition, you must provide consistency across the cluster so that:
• User names are the same on all nodes.
• UIDs are the same on all nodes.
• GIDs are the same on all nodes.
• Applications in the system area are the same on all nodes.
• System time is consistent across the cluster.
• Files that could be used by more than one node, such as files in the /usr directory,
must be the same on all nodes.
About Cluster-wide Device Special Files (cDSFs)
Under agile addressing on HP-UX 11i v3, each device has a unique identifier as seen
from a given host; this identifier is reflected in the name of the Device Special File
(DSF). See “About Device File Names (Device Special Files)” (page 106) for more
information.
Cluster Configuration Planning 135