About This Document
Overview
A high availability (HA) system consists of two devices, whose nodes back up for each other by periodically exchanging heartbeat. If either device fails due to network, system, or process abnormalities, the other device can take over services from the failed one to ensure service continuity.
This document describes how to deploy the HA application to implement dual backup.
Symbol Conventions
Symbols that may be found in this document are defined as follows:
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Description |
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Indicates a hazard with a high level of risk which, if not avoided, could result in death or serious injury. |
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Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. |
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Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury. |
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Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or other unanticipated results. NOTICE is used to address practices not related to personal injury. |
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Supplements the important information in the main text. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration. |
