The InfiniBand connectivity between the nodes and the switches is highly configurable. Refer to the guidelines below, and the figures in subsequent sections.
UDA Inter-System Connections
The following guidelines apply to connections between the SAS HPA system and the UDA fabric.
- The number of UDA uplinks is based on a node-to-uplink ratio of 6:1, with a minimum of 3 uplinks.
- Uplinks are connected switch to switch.
- Connect the UDA uplinks as follows:
- For one- and two-cabinet systems, connect the UDA uplinks to the first-tier switch in cabinet 1.
- For systems with three or more cabinets, connect the UDA uplinks to the second-tier switch in cabinet 2.
- UDA connections between systems start at the highest switch port on both systems, and connect in descending order.
For more information, see the Teradata Unified Data Architecture InfiniBand and Server Management Configuration Guide, B035-6001.
Teradata Connect Inter-System Connections
The following guidelines apply to connections between the SAS HPA system and the legacy BYNET V4 or BYNET-Over-Ethernet system.
- The system uses one or more Teradata Connect nodes. The system configuration dictates the number of Teradata Connect nodes needed.
- For BYNET V4, the BIC2SE adapter in the Teradata Connect node enables the gateway connection to the Teradata BYNET V4 system.
- For BYNET-Over-Ethernet, one to four BYNET-Over-Ethernet pairs connect into the Teradata BYNET-Over-Ethernet system.
Appliance Intra-System Connections: Switch-to-Switch
The following guidelines apply to connectivity in the SAS HPA 750 Appliance. (Refer to the diagrams in the following sections for examples and details.)
- Switch requirements:
- One-cabinet and two-cabinet systems use a single base switch.
- Systems with three or more cabinets use first-tier and second-tier switches.
- When 36-port, second-tier switches are installed, these switches reside in cabinet 2 (the first expansion cabinet) and provide the second level of connection.
- When larger InfiniBand switches are installed, they reside in separate switch cabinets.
- Six switch-to-switch uplinks are required for all configurations.
- Uplink connections start at the highest switch port number for the first-tier switch, and connect in ascending cabinet number to the second-tier switch, beginning with the first port.
Appliance Intra-System Connections: Node-to-Switch
The following general guidelines apply to connectivity in the SAS HPA 750 Appliance. (Refer to the diagrams in the following sections for examples and details.)
- Intra-cabinet node-to-switch connections start with chassis 2 and switch port 1, and continue in ascending order.
- Inter-cabinet node-to-switch connections start with first available switch port after the intra-cabinet connections.
- Intra-cabinet connections use copper cables.
- Inter-cabinet connections use fiber cables.