Introduction To Groupwise 8 And Novell Cluster Services On Netware - Novell GROUPWISE 8 - INTEROPERABILITY Manual

Introduction to GroupWise 8 and
1
Novell Cluster Services on
NetWare
Before implementing GroupWise
understanding of Novell Cluster Services by reviewing the following information resources:
AppNote: An Introduction to Novell Cluster Services (http://developer.novell.com/research/
appnotes/1999/may/01/a990501_.pdf)
Novell Open Enterprise Server (OES) Product Documentation:
Services 1.8 Administration Guide for NetWare (http://www.novell.com/documentation/oes/
cluster_admin/data/h4hgu4hs.html#bktitle)
NetWare 6.5 Product Documentation:
documentation/ncs65)
When you review the information resources recommended above, you discover that clustering
employs very specialized terminology. The following brief glossary provides basic definitions of
clustering terms and relates them to your GroupWise system:
cluster: A grouping of from 2 to 32 NetWare
that data storage locations and applications can transfer from one server to another without
interrupting their availability to users.
node: A clustered server; in other words, a single NetWare server that is part of a cluster.
resource: An IP address, volume, application, service, and so on, that can function successfully
anywhere in the cluster. The volumes where domains and post offices reside are a specific type of
cluster resources termed "volume resources." In this section, the terms "cluster resource" and
"volume resource" are used instead of "resource" to avoid confusion with GroupWise resources
(such as conference rooms and projectors).
failover: The process of moving cluster resources from a failed node to a functional node so that
availability to users is uninterrupted. For example, if the node where the POA is running goes down,
the POA and its post office fail over to a secondary node so that users can continue to use
GroupWise. When setting up cluster resources, you need to consider what components need to fail
over together in order to continue functioning.
fan-out-failover: The configuration where cluster resources from a failed node fail over to different
nodes in order to distribute the load from the failed node across multiple nodes. For example, if a
node runs a cluster resource consisting of a domain and its MTA, another cluster resource consisting
of a post office and its POA, and a third cluster resource for WebAccess, each cluster resource can
be configured to fail over separately to different secondary nodes.
failback: The process of returning cluster resources to their preferred node after the situation
causing the failover has been resolved. For example, if a POA and its post office fail over to a
secondary node, that cluster resource can be configured to fail back to its preferred node when the
problem is resolved.
® ®
8 with Novell Cluster Services
Novell Cluster Services (http://www.novell.com/
®
servers configured using Novell Cluster Services so

Introduction to GroupWise 8 and Novell Cluster Services on NetWare

, make sure you have a solid
TM
OES Novell Cluster
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