For Teradata Appliance for Hadoop 6 systems, the maximum system configuration that can be accomplished with a single pair of 36-port InfiniBand second tier switches is a 9-cabinet, 162 node system. Systems with between 3 and 9 cabinets require second tier switches to interconnect the first-tier switches and provide the connection point for the uplinks that connect to the UDA fabric.
Second-tier switches are located in Cabinet 2 (the first expansion cabinet) in 3- to 9-cabinet systems.
Hadoop System Network Topology for a 9-Cabinet System
- The system consists of one base and up to 8 expansion cabinets.
- Each cabinet contains processing nodes and a VMS for server management.
- Cabinets can contain other nodes and servers.
- The base cabinet contains a System VMS for server management.
- Each expansion cabinet contains a Cabinet VMS for server management.
- System is scalable up to 162 nodes and servers in any combination.
- Six ports on each of the InfiniBand switches in Cabinet 1, Cabinets 3 - 5, and Cabinets 7 - 8 are used to provide the connection to the second tier switches.
- In a UDA configuration, the second tier switches can be used for UDA connections. 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.