Overview; System Hierarchy - Silicon Graphics ICE X User Manual

5: SGI ICE X Administration/Leader Servers

Overview

System Hierarchy

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User interfaces consist of the Compute Cluster Administrator, the Compute Cluster Job Manager,
and a Command Line Interface (CLI). Management services include job scheduling, job and
resource management, Remote Installation Services (RIS), and a remote command environment.
The administrative controller server is connected to the system via a Gigabit Ethernet link, (it is
not directly linked to the system's InfiniBand communication fabric).
Note that the system management software runs on the administrative node, RLC and service
nodes as a distributed software function. The system management software performs all of its
tasks on the ICE X system through an Ethernet network.
The administrative controller server (also known as the system admin controller) is at the top of
the distributed management infrastructure within the SGI ICE X system. The overall SGI ICE X
series management is hierarchical (see the following subsection "System Hierarchy" and also
Figure 5-1 on page 70), with the RLC(s) communicating with the compute nodes via CMC
interconnect.
The SGI ICE X system has a four-tier, hierarchical management framework. The ICE X systems
contain hardware and software components as follows:
• System Admin Controller (SAC) - one per system
• Rack Leader Controller (RLC) - one per 8 CMCs
• Chassis Management Controller (CMC) - one or two per blade enclosure
• 48-port Gigabit Ethernet switch (note that some system racks may contain more than one
48-port switch - reference Figure 2-2 on page 20 as an example)
• Baseboard Management Controller (BMC) - one per each of the following:
– Compute node (note that some blades may contain more than one logical node)
– SAC
– RLC
– Service node
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