Silicon Graphics Altix ICE 8000 Series, Краткое руководство пользователя

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1: SGI Altix ICE 8000 Series System Overview
Ethernet traffic for managing the nodes in a rack is constrained within the rack by the
leader node. Communication and control is distributed across the entire cluster,
thereby avoiding a communication bottleneck to the admin node. Administrative
tasks, such as booting the cluster, can be done in parallel rack-by-rack in a matter of
seconds. For very large configurations, the access infrastructure can also be scaled by
adding additional login and batch service nodes. It is the VLAN logical networks that
help prevent network traffic bottlenecks.
Note: Understanding the VLAN logical networks is critical to administering an SGI
Altix ICE system. For more detailed information, see "VLANs" on page 16 and
"Network Interface Naming Conventions" on page 22.
The rack leader controller (leader node) and admin node are described in the section
that follows ("System Nodes" on page 7).
Chassis Manager
Figure 1-2 on page 7 shows chassis manager cabling.
Note: All nodes reside in the Altix ICE custom designed rack. Figure 1-2 on page 7
and Figure 1-3 on page 12 show how systems are cabled up prior to shipment. These
figures are meant to give you a functional view of the Altix ICE hierarchical design.
They are not meant as cabling diagrams.
The chassis manager in each rack connects to the leader node in its own rack and also
the chassis manager in the adjacent rack. The admin node connects to one leader node
in the rack. The admin node accesses the BMC on each compute node in the rack via
VLAN running over a Gigabit Ethernet (GigE) connection (see Figure 1-7 on page 19).
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