Sun Microsystems Sun HPC 3.0, Manual

Page: 14 / 67

Figure 1–2 Two-Node SCI Interconnection, Without Striping
If you expect to add a node to a two-node network at a later time, you may want to
connect the two nodes through a switch now, even though the switch is not needed.
This would simplify the process of adding a third node later on. The chief
disadvantage to using a switch in a two-node network is the latency it adds to the
communication path between the nodes.
This alternate connection scheme is discussed further in “Connecting SCI Adapter
Cards in a Two-Node Network” on page 12.
Three-Node Networks
Figure 1–3 shows examples of how three Sun HPC nodes can be connected to an SCI
network, in both unstriped and striped modes.
4
Sun HPC 3.0 SCI Guide
♦
June 1999, Revision A