gtpg1m0d | General Information |
The TPF system has the following features:
The TPF Application Requester (TPFAR) feature allows TPF application programs to read and write data directly to DATABASE 2 (DB2) Version 2 Release 3 or later. The TPFAR feature supports IBM's System Application Architecture (SAA) strategy for database distribution using the remote unit of work method of distributed access. Distributed access involves working with data that is located on remote systems. The remote unit of work method involves Structured Query Language (SQL) commands imbedded in a local host program used to access a remote relational database (RDB) manager.
The TPFAR feature implements the requester portion of the Distributed Relational Database Architecture (DRDA), allowing TPF application programmers to send static SQL requests to a remote DB2.
Figure 9 shows an SQL request using the TPFAR feature. When the TPF system application makes an SQL request, the TPFAR feature, using TPF Advanced Program-to-Program Communications (TPF/APPC), forwards the request to the application server (AS) on DB2. All communications protocols are handled by the TPFAR feature. DB2 then completes the requested work and returns the result to the TPFAR feature. TPFAR returns the result to the application. TPFAR can also be used to move data from DB2 to the TPF system.
To use the TPFAR feature on your system, you need the following:
Figure 9. SQL Request Using the TPFAR Feature
The High Performance Option (HPO) feature, consisting of the loosely coupled (LC) facility and the multiple database function (MDBF), allows the TPF system to run in a loosely coupled configuration where each CPC can share a common database. The High Performance Option feature provides two distinct sub-functions:
The Multi-Processor Interconnect Facility (MPIF) feature is a required feature for the High Performance Option (HPO) feature.
The Multi-Processor Interconnect Facility (MPIF) feature permits TPF CPCs to communicate with each other at very high speed.
TPF publications will be available in softcopy at the general availability of the TPF 4.1 system.