ServerNet Cluster Manual

Planning for Installation
ServerNet Cluster Manual—520575-003
2-9
Software Requirements for the Star, Split-Star, and
Tri-Star Topologies
Software Requirements for the Star, Split-Star, and Tri-Star
Topologies
Each topology has different software requirements. You must make sure that any
server added to a cluster meets the software requirements for the topology. See
Table 2-8 on page 2-23.
Subsets of a Topology
Valid subsets of the split-star and tri-star topologies can be built as long as they meet
the software requirements for the topology shown in Table 2-8 on page 2-23. The valid
subsets of a topology are:
•
A subset of the split-star topology having up to eight nodes and using only one
cluster switch per fabric
•
A subset of the tri-star topology having up to eight nodes with one cluster switch
per fabric
•
A subset of the tri-star topology having up to 16 nodes with two cluster switches
per fabric
For details about each type of subset, see Table 1-1 on page 1-7.
Planning for Hardware
Hardware planning consists of ordering the ServerNet cables, MSEBs, and cluster
switches needed to connect a cluster. Contact your HP representative for the most
current ordering information.
Cluster Switches Required for Each Topology
The number of cluster switches you need depends on the topology you use to build the
cluster. Table 2-3
lists the cluster switch requirements for each topology.
Table 2-3. Cluster Switch Requirements for Each Topology
Topology
Cluster
Switches
per Fabric
Total
Cluster
Switches
Fiber-Optic Cables
For Multilane Link Nodes Supported
Star 1 2 None Up to 8
Split-star (subset) 1 2 None Up to 8
Split-star 2 4 8 (2 four-lane links) Up to 16
Tri-star (subset) 1 2 None Up to 8
Tri-star (subset) 2 4 4 (2 two-lane links) Up to 16
Tri-star 3 6 12 (6 two-lane links) Up to 24