System Topology and Connectivity Guidelines for IntelliFlex

Teradata® Hardware Product Guide

brand
Hardware
prodname
BAR Managed Servers
IntelliBase Platforms
IntelliFlex Platforms
category
Product Guide
featnum
B035-6200-068K

UDA Inter-System Connections

  • The number of UDA uplinks is based on a node-to-uplink ratio of 6:1, with a minimum of three uplinks, based on the smaller of the systems being connected. For example, a 30-node IntelliFlex system connected to a 24-node Hadoop Appliance system would require four cables (6:1 ratio based on the 24-node system).
  • Uplinks are connected switch to switch.
  • Connect the UDA uplinks:
    • For IntelliFlex systems containing a single pair of first-tier switches, connect the UDA uplinks to these switches in cabinet 1.
    • For IntelliFlex systems containing multiple first-tier and a single pair of second-tier switches, connect the UDA uplinks to the second-tier switches in cabinet 2.
    • For systems with multiple pairs of second-tier switches, evenly distribute the UDA uplinks to the second-tier switches for best performance.
  • UDA connections between systems start at the highest switch port on both systems, and connect in descending order.

IntelliFlex Intra-System Connections

When second-tier switches are used, each clique is considered a group, and the cabinets in the group connect to the same first-tier switches. The number of uplinks to each second-tier switch depends on the number of second-tier switches in use, which depends on the number of nodes and cabinets.
  • The two-tier BYNET switch topology enables large system sizes using 36-port switches.
  • A single set of first-tier switches can support one to five cliques depending on clique size.
  • Large systems are built with multiple first-tier switches interconnected with one to four sets of second-tier switches.
  • Number of first-tier switch to second-tier switch uplinks is four for standard configurations.
  • Second-tier 36-port switches can be installed in any cabinet that doesn't contain first-tier switches, default is Cabinet 2.
  • Extremely large systems use the large switches in the BYNET cabinet as the second-tier switch.
  • Processing nodes and Fabric-Attached Storage of a clique must be connected to the same first-tier switch.
  • BYNET-attached PE nodes, TMS, and channel server nodes can connect to any first-tier switch.
Second-Tier Switches and Uplinks Needed (Example with one 12+1 Clique per Group)
Number of Groups Maximum Number of Nodes Second-Tier Switches per Fabric Uplinks (First-tier to Second-tier) Per Second-Tier Switch or Group
1 to 9 117 One 36-port switch 4
10 to 18 234 Two 36-port switches 2
19 to 36 468 Four 36-port switches 1
37 to 81 1053 One 324-port switch 4