Novell D7171A - NetServer - LPr, Руководство по установке

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Overview and Installation
Overview and Installation
100-004511-001 A
August 31, 1999
Novell Confidential
Temp. Rev 2.02 26 Feb 99
Product Benefits
NetWare Cluster Services allows you to configure up to 32 NetWare 5 servers
into a high-availability cluster, where resources can be dynamically switched
or moved to any server in the cluster. Resources can be configured to
automatically switch or be moved in the event of a server failure, or can be
moved manually to troubleshoot hardware or balance the workload.
NetWare Cluster Services provides high availability from commodity
components. Lower costs are obtained through the consolidation of
applications and operations onto a cluster. The ability to manage a cluster from
a single point of control and to adjust resources to meet changing workload
requirements (thus, manually “load balance” the cluster) are also important
benefits of NetWare Cluster Services.
An equally important benefit of implementing NetWare Cluster Services is that
you can reduce unplanned service outages and reduce planned outages for
software and hardware maintenance and upgrades.
Reasons you would want to implement NetWare Cluster Services include:
• Increased availability
• Improved performance
• Low cost of operation
• Scalability
• Disaster recovery
• Data protection
• Shared resources
Shared disk fault tolerance can be obtained by implementing RAID Level 5 on
the shared disk subsystem.
An example of the benefits NetWare Cluster Services provides can be better
understood through the following scenario.
Suppose you have configured a three-server cluster, with a Web server installed
on each of the three servers in the cluster. Each of the servers in the cluster hosts