Technical data

Multirack Configurations
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Multirack Configurations
Sample SGI 2400 or 2800 multirack configurations are shown in Figure 4-6 through
Figure 4-9. These can be large system configurations requiring a significant amount of
floor space, along with special power and cooling considerations. The multirack
configuration can have between 8 and 256 processors, up to 512 GB of main memory, and
up to 192 XIO slots through 16 separate system modules. If you are considering
expanding your current configuration, be sure to consult the Site Preparation Guide for
your system, along with your facilities engineer, a reputable electrician, and your SGI
system support engineer (SSE).
Table 4-3 lists the number of various hardware components that can be supported
through a multirack configuration.
Figure 4-6 and Figure 4-7 show two examples of 32P (or processor) configurations. These
systems require two racks, along with the necessary CrayLink Interconnect cabling. Each
of the racks has two modules, and each module has four Node boards and two Router
boards. This configuration simply doubles the 16P configuration by adding a second
(16P) rack.
Table 4-3 Multiple-Rack Configurations
Hardware Component Number Range
Number of racks 2 to 16
CPU Node boards 2 to 64
64-bit CPUs 4 to 256
Main memory per Node board 64 MB to 4 GB (using 256-MB memory DIMMs)
Main memory per chassis 128 MB to 32 GB (using eight Node boards)
Main memory (entire configuration) 128 MB to 512 GB
Number of internal SCA drives 5 to 80
Number of XIO slots 24 to 192