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Category
CategoryCategory
Category
Rule Index
Rule IndexRule Index
Rule Index
Rule Description
Rule DescriptionRule Description
Rule Description
Multi-System
Multi-SystemMulti-System
Multi-System
High
HighHigh
High
Availability
AvailabilityAvailability
Availability
(Please also refer to
Multi-System High
Availability section
following this
table)
48
Multi-initiator support is required for Serviceguard.
Traditional
TraditionalTraditional
Traditional
Multi-System
Multi-SystemMulti-System
Multi-System
High
HighHigh
High
Availability
AvailabilityAvailability
Availability
49
To configure a cluster with no SPOF, the membership must extend beyond a single cabinet. The cluster must be
configured such that the failure of a single cabinet does not result in the failure of a majority of the nodes in the
cluster. The cluster lock device must be powered independently of the cabinets containing the cluster nodes.
Alternative cluster lock solution is the Quorum Service, which resides outside the Serviceguard cluster providing
arbitration services.
50
A cluster lock is required if the cluster is wholly contained within two single cabinets (i.e., two Superdome 16-way or
32-way systems or two Superdome PA-8800 32-way or 64-way systems) or two dual cabinets (i.e. two Superdome
64-way systems or two Superdome PA-8800 128-way systems). This requirement is due to a possible 50% cluster
failure.
51
Serviceguard only supports cluster lock up to four nodes. Thus a two cabinet configuration is limited to four nodes
(i.e., two nodes in one dual cabinet Superdome 64-way system or Superdome PA-8800 128-way system and two
nodes in another dual cabinet Superdome 64-way system or Superdome PA-8800 128-way system). The Quorum
Service can support up to 50 clusters or 100 nodes (can be arbitrator to both HP-UX and Linux clusters).
52
Two cabinet configurations must evenly divide nodes between the cabinets (i.e. 3 and 1 is not a legal 4-node
configuration).
53
Cluster lock must be powered independently of either cabinet.
54
Root volume mirrors must be on separate power circuits.
55
Redundant heartbeat paths are required and can be accomplished by using either multiple heartbeat subnets or via
standby interface cards.
56
Redundant heartbeat paths should be configured in separate I/O chassis when possible.
57
Redundant paths to storage devices used by the cluster are required and can be accomplished using either disk
mirroring or via LVM's pvlinks.
58
Redundant storage device paths should be configured in separate I/O chassis when possible.
59
Dual power connected to independent power circuits is recommended.
Category
CategoryCategory
Category
Rule Index
Rule IndexRule Index
Rule Index
Rule Description
Rule DescriptionRule Description
Rule Description
Heterogeneous
HeterogeneousHeterogeneous
Heterogeneous
Multi-System
Multi-SystemMulti-System
Multi-System
High
HighHigh
High
Availability
AvailabilityAvailability
Availability
60
Cluster configurations can contain a mixture of Superdome and non-Superdome nodes.
61
Care must be taken to configure an even or greater number of nodes outside of the Superdome cabinet
62
If half the nodes of the cluster are within a Superdome cabinet, a cluster lock is required (4-node maximum cluster
size)
63
If more than half the nodes of a cluster are outside the Superdome cabinet, no cluster lock is required (16-node
maximum Serviceguard cluster size).
64
Up to a 4-node cluster is supported within a single cabinet system (Superdome 16-way or Superdome PA 8800 32-
way)
65
Up to an 8-node cluster is supported within a single cabinet system* (Superdome 32-way or Superdome PA-8800
64-way)
66
Up to a 16-node cluster is supported within a dual cabinet system* (Superdome 64-way or Superdome PA-8800
128-way)
67
Cluster lock is required for 2-node configurations
68
Cluster lock must be powered independently of the cabinet.
69
Root volume mirrors must be on separate power circuits.
70
Dual power connected to independent power circuits is highly recommended.
QuickSpecs
HP 9000 Superdome Servers
HP 9000 Superdome ServersHP 9000 Superdome Servers
HP 9000 Superdome Servers
(PA-8600, PA-8700 and PA-8800)
(PA-8600, PA-8700 and PA-8800)(PA-8600, PA-8700 and PA-8800)
(PA-8600, PA-8700 and PA-8800)
System Management Features
DA - 11721 North America — Version 13 — April 1, 2005
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