Category
Category
Category
Category
Rule Index
Rule Index
Rule Index
Rule Index
Rule Description
Rule Description
Rule Description
Rule Description
Multi-System
Multi-System
Multi-System
Multi-System
High
High
High
High
Availability
Availability
Availability
Availability
(Please also
refer to Multi-
System High
Availability
section following
this table)
48
Multi-initiator support is required for Serviceguard.
Traditional
Traditional
Traditional
Traditional
Multi-System
Multi-System
Multi-System
Multi-System
High
High
High
High
Availability
Availability
Availability
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- processor or 32-processor systems or two Superdome PA 8800/PA 8900 32-
processor or 64-processor systems) or two dual cabinets (i.e. two Superdome 64-processor core
systems or two Superdome PA 8800/PA 8900 128 processor core 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-processor system or
Superdome PA 8800/PA 8900 128-processor core system and two nodes in another dual
cabinet Superdome 64-processor core system or Superdome PA 8800/PA 8900 128-processor
core 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.
QuickSpecs
HP 9000 Superdome Servers (PA-8600, PA-8700, PA-
HP 9000 Superdome Servers (PA-8600, PA-8700, PA-
HP 9000 Superdome Servers (PA-8600, PA-8700, PA-
HP 9000 Superdome Servers (PA-8600, PA-8700, PA-
8800 and PA-8900)
8800 and PA-8900)
8800 and PA-8900)
8800 and PA-8900)
System Management Features
DA - 11721 Worldwide — Version 28 — October 23, 2009
Page 41