ExpressCluster X 3.1 for Linux Getting Started Guide - Nec

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Chapter 2 Using ExpressClusterWhat is ExpressCluster?ExpressCluster is software that enhances availability and expandability of systems by a redundant(clustered) system configuration. The application services running on the active server areautomatically inherited to a standby server when an error occurs in the active server.ExpressCluster modulesExpressCluster consists of following three modules:ExpressCluster ServerA core component of ExpressCluster. Includes all high availability function of the server. Theserver function of the WebManager is also included.ExpressCluster X WebManager (WebManager)A tool to manage ExpressCluster operations. Uses a Web browser as a user interface. TheWebManager is installed in ExpressCluster Server, but it is distinguished from theExpressCluster Server because the WebManager is operated from the Web browser on themanagement PC.ExpressCluster X Builder (Builder)A tool for editing the cluster configuration data. The Builder also uses Web browser as a userinterface. The following two versions of Builder are provided: the offline version, which isinstalled on your terminal as software independent of ExpressCluster Server, and the onlineversion, which is opened by clicking the setup mode icon on the WebManager screen toolbaror Setup Mode on the View menu. The Builder needs to be installed separately from theExpressCluster Server on the machine where you use the Builder.30ExpressCluster X 3.1 for Linux Getting Started Guide
Software configuration of ExpressClusterSoftware configuration of ExpressClusterThe software configuration of ExpressCluster should look similar to the figure below. Install theExpressCluster Server (software) on a Linux server, and the Builder on a management PC or aserver. Because the main functions of WebManager and Builder are included in ExpressClusterServer, it is not necessary to separately install them. However, to use the Builder in an environmentwhere ExpressCluster Server is not accessible, the offline version of Builder must be installed onthe PC. The WebManager or Builder can be used through the Web browser on the management PCor on each server in the cluster.LinuxExpressClusterXWebManager(Server)JREBuilderWebManager(Browser)Server 1LinuxExpressCluster XWebManager(Server)JREBuilderWebManager(Browser)Server 2WindowsorLinuxJREBuilderWebManager(Browser)Management PCFigure 2-1 Software configuration of ExpressClusterHow an error is detected in ExpressClusterThere are three kinds of monitoring in ExpressCluster: (1) server monitoring, (2) applicationmonitoring, and (3) internal monitoring. These monitoring functions let you detect an error quicklyand reliably. The details of the monitoring functions are described below.Section I Introducing ExpressCluster31
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Updating ExpressClusterUpdating Exp
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Appendix• Appendix A Glossary•
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Appendix A GlossaryNodeHeartbeatPub
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Appendix B Indexmonitorable and non
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