Jointly developed with SAS, the Teradata Appliance for SAS High-Performance Analytics (HPA) enables high-performance, in-memory processing of data residing in Teradata databases. In UDA environments, the Teradata Appliance for SAS can also process data that resides in Aster systems and Hadoop systems. This appliance executes advanced analytics that result in providing new insights to daily operations in near real-time.
- SAS HPA Base and Performance worker nodes. These worker nodes host the SAS Analytical in-memory software. All SAS 750 Appliances contain at least three SAS HPA worker nodes.
- In systems that interface to data sources through UDA (using InfiniBand or BYNET V5 networks), these nodes connect to the Teradata fabric through switches that are also connected to the data source (Teradata Database, Hadoop system, or Aster system).
- In systems that interface to data sources through BYNET V4 or BYNET-Over-Ethernet networks, these nodes connect to Teradata Connect nodes. The Teradata Connect nodes provide the gateway to the Teradata Database.
- SAS Mid-Tier nodes. These nodes run additional SAS software to support the SAS Visual Analytics application and are optional. SAS Mid-Tier nodes connect to the system and fabric in the same way as the SAS HPA worker nodes.
- Teradata Connect nodes. These nodes are used in SAS appliances that connect to legacy BYNET V4 and BYNET-Over-Ethernet Teradata systems. The Teradata Connect nodes provide the gateway that connects the SAS worker nodes to the local InfiniBand switches in the SAS 750 appliance and the Teradata fabric, thereby connecting to the Teradata data source.
- SAS App Server. The SAS App Server may be installed in the SAS 750 Appliance to provide for general purpose SAS computing. The SAS App Server connects to the SAS HPA worker nodes.
- Cabinets with Power Type A cannot support as many nodes and servers as cabinets with Type B, C, or D power. Refer to the cabinet build diagrams later in this chapter.
- For systems that connect to the data source via UDA (using InfiniBand or BYNET V5 connectivity), each base cabinet can contain up to 18 SAS worker nodes.
- For two-cabinet systems that connect to the data source via UDA (using InfiniBand or BYNET V5 connectivity), the expansion cabinet can contain up to 15 SAS worker nodes for a system total of 33 nodes. This limit results from the number of ports needed on the 36-port InfiniBand switches for uplink to the UDA fabric.
- For three-cabinet systems and larger that connect to the data source via UDA (using InfiniBand or BYNET V5 connectivity), each expansion cabinet after the first expansion cabinet (cabinets 3 and up) can contain up to 18 SAS worker nodes.
- For systems that use Teradata Connect nodes to connect to the BYNET V4 or BYNET-Over-Ethernet fabric, each base or expansion cabinet can contain up to four Teradata Connect nodes. If all four Teradata Connect nodes are installed in a cabinet, the cabinet can contain up to 16 SAS HPA worker nodes.
- For systems that use Teradata Connect nodes to connect to the BYNET V4 or BYNET-Over-Ethernet fabric, each base or expansion cabinet can contain up to 20 nodes in total.
Because the SAS software architecture supports clustering, a single SAS HPA 750 Appliance can support multiple systems and fabrics of different types. Whenever the SAS HPA 750 Appliance is connected to a UDA fabric, the InfiniBand switches that provide the uplinks to the UDA fabric must have enough ports available for the UDA uplinks.
Each base cabinet provides a System VMS, and each expansion cabinet provides a Cabinet VMS.