C Setting Up Auto-Failover; Enabling Auto-Failover - Novell BUSINESS CONTINUITY CLUSTERING 1.1 SP2 - ADMINISTRATION Administration Manual

Setting Up Auto-Failover
C
Auto-failover is available beginning in Novell
auto-failover feature, you must enable it, then configure the auto-failover settings.
WARNING: Auto-failover is disabled by default and is not recommended. It should only be
enabled after a thorough examination and review of your network and geographic site infrastructure.
You should seriously consider the adverse conditions that might occur as a result of enabling this
feature.
These conditions may include but are not limited to:
Data loss at one or more geographic sites
Data corruption at one or more geographic sites
Data divergence at one or more geographic sites
For example, if there is a loss of communication between two clusters and auto-failover has been
enabled and configured, each cluster will assert ownership of BCC-enabled cluster resources. These
resources then automatically load on both clusters.
When communication between cluster has been restored, some of the data on each cluster is
different. This is called data divergence. Also, the mirroring or synchronization process either fails,
or attempts to overwrite any changed data on one cluster. This causes either data loss or data
corruption.
Section C.1, "Enabling Auto-Failover," on page 133
Section C.2, "Creating an Auto-Failover Policy," on page 134
Section C.3, "Refining the Auto-Failover Policy," on page 134
Section C.4, "Adding or Editing Monitor Configurations," on page 136
C.1 Enabling Auto-Failover
To enable auto-failover for all Business Continuity Cluster resources in a cluster:
1 Start your Internet browser and enter the URL for iManager.
The URL is http://server_ip_address/nps/iManager.html. Replace server_ip_address with the
IP address or DNS name of the server that has iManager and the Identity Manager
preconfigured templates for iManager installed.
2 Specify your username and password, specify the tree where you want to log in, then click
Login.
3 In the left column, click Clusters, then click the Cluster Options link.
4 Specify a cluster name, or browse and select the Cluster object.
5 Click the Properties button and then click the Business Continuity tab.
6 Click the Main link.
7 Click the Auto-Failover button.
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Business Continuity Clustering 1.1. To set up the
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Setting Up Auto-Failover 133