ServerNet Cluster Manual

ServerNet Cluster Description
ServerNet Cluster Manual—520575-003
1-9
Hardware and Software Components for Clustering
Hardware and Software Components for Clustering
For each topology, Table 1-2 lists key hardware components required to construct a
ServerNet cluster.
For more information about hardware, see ServerNet Cluster Hardware Overview on
page 1-18.
Table 1-2. Hardware Components for Clustering
Hardware
Component
Required for
Star
Topology
Required for
Split-Star
Topology
Required
for Tri-Star
Topology Notes
NonStop
S-series servers
1 to 8 1 to 16 1 to 24 Each server can have 2
to 16 processors.
Cluster switches 2
(1 per
external
fabric)
4
(2 per
external
fabric)
6
(3 per
external
fabric)
Subsets of the split-star
and tri-star topologies
use fewer cluster
switches.
Modular
ServerNet
expansion
boards (MSEBs)
2 to 16 2 to 32 2 to 48 Two MSEBs are
required for each node
(one per external fabric).
NNA PICs
installed in
MSEBs
2 to 16 2 to 32 2 to 48 Two NNA PICs are
required for each node
(one per external fabric).
Single-wide
PICS installed in
cluster switches
16 32 48 Eight single-wide,
single-mode fiber-optic
PICS are included in
each cluster switch.
These PICs are not
replaceable.
Double-wide
PICs installed in
cluster switches
None.
However,
these PICs
are included
in each
cluster switch
for future
use.
8 12 Two double-wide,
single-mode fiber-optic
PICs are included in
each cluster switch.
Each double-wide PIC
has two ports. These
PICs are not
replaceable.
Fiber-optic
cables (node to
cluster switch)
2 to 16 2 to 32 2 to 48 Two single-mode fiber-
optic cables are
required per node (one
per external fabric).
Fiber-optic
cables (between
cluster
switches)
NA 8
(4 for each
fabric)
12
(6 for each
fabric)
See Fiber-Optic Cables
for Multilane Links on
page 2-10.