TNS/R Native Application Migration Guide

Introduction to Native Mode

TNS/R Native Application Migration Guide—523745-001

1-3

Underlying Native Mode Structure for All Programs

As shown in Figure 1-1 on page 1-3, because the D20 RVU HP has converted an

increasing amount of system code, system library routines, and other products to run in

native mode. (Shaded regions in the figure indicate code that runs, at least in part, in

native mode.) TNS and accelerated object code have and continue to benefit from the

increased performance of the native architecture without a single line of source change

or recompilation.

While native mode offers many benefits, you are not required to convert your programs

to native mode. D40 RVUs continue to support the TNS compilers and tools. You can

continue to create and run TNS and accelerated object code and gain the performance

benefits provided by HP software that has been converted to native mode.

Figure 1-1. Native Mode Benefits All Programs

NonStop Kernel

Transaction

Services

Networking

Services

Database

Services

Guardian API Open System Services API

TNS

Object Code

Accelerated

Object Code

Native

Object Code

VST001.vsd