The system can accommodate up to 72 cabinets using eight pairs of second-tier 36-port switches. This allows for up to 864 nodes.
Second-tier switches are located in Cabinets 2, 4, 6, 8, 10, 12, 14, and 16 in systems with 37 to 72 cabinets.
2850 System Network Topology for a 72-Cabinet System
- The system consists of up to 72 cabinets (up to 36 clusters).
- The first cabinet contains 2850 processing nodes (2-node or 4-node cliques) and may contain additional systems (680, 2800, or 2850 systems).
- The other cabinets contain 2850 processing nodes (2-node or 4-node cliques).
- The first cabinet contains a System VMS for server management, and may contain additional TMSs.
- Each additional cabinet may contain a Cabinet VMS for server management.
- Each pair of cabinets (Cabinets 1 and 2, Cabinets 3 and 4, and so on) form a group of up to 24 nodes. The nodes in the cluster share the first-tier switches in the first cabinet of the pair.
- Eight ports on each of the InfiniBand switches in Cabinet 1, Cabinet 3, Cabinet 5, Cabinet 7, and the remaining odd-numbered cabinets are used to provide the uplink connections to the second-tier switches.
- The system uses eight sets of 36-port second-tier switches.
- Of the eight uplink connections to the second-tier switches, one connects to the first second-tier switch, one connects to the second second-tier switch, one connects to the third second-tier switch, and so on, resulting in one uplink connection to each second-tier switch (for each fabric).
- When connected to a UDA network, the second-tier switches can be used for UDA connections. Distribute the UDA connections evenly across the pairs of second-tier switches for best performance. For more information, see the Teradata Unified Data Architecture InfiniBand and Server Management Configuration Guide, B035-6001.
- For port-to-port cabling, see the appropriate Hardware Installation Guide.