Introduction

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Intel® High Availability (HA) systems feature built-in redundancy for active system components such as power supplies, system master processor boards, and system alarms. Redundant Host (RH) systems are HA systems that feature an architecture allowing the Active Host system master processor board to hand over control of its bus segment to a Standby Host system master processor board.

This section gives an overview of the hardware and software used in systems supported by Intel’s High Availability Software Development Kit (HASDK).

The following figure shows how the basic elements in an HASDK system are related.

Figure 1. High-Availability CPU Architecture

 

 

 

 

Host

Available Host

 

 

 

 

Application

 

 

 

 

 

 

Current Host

 

 

Host

 

 

 

 

 

Application

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RH

RH

 

 

 

 

 

 

Comm

 

 

 

 

 

Driver

Driver

 

 

 

 

 

Driver

 

 

 

 

 

 

 

OS/Drivers

Slot

Comm

Backplane

Hot Swap

RH

RH

 

Control

Comm

 

Driver

Driver

Driver

Driver

 

 

Driver

Driver

 

 

 

 

 

 

 

 

 

Slot

 

 

CompactPCI

RH Comm

 

 

 

 

 

Interface

Controller

 

 

 

 

 

 

 

 

 

 

 

 

Controller

 

Hardware

Slot

Comm

PCI-to-PCI

CompactPCI

RH Comm

 

Interface

Controller

 

Controller

Controller

Bridge

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

CompactPCI Bus

 

 

2.1Terminology

The following terms are commonly used in this document:

Active Host (also known as Current Host, owner, or bus segment owner)—A board is said to be Active or the Active Host if it is providing System Host functions to the peripherals in a CompactPCI backplane. This means that it is the Owner of at least one bus segment.

High Availability Software for the Intel® NetStructureTM ZT 4901 Technical Product Specification

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Intel ZT 4901 manual Introduction, Terminology, Following terms are commonly used in this document