Novell GROUPWISE 7 - INTEROPERABILITY GUIDE, Руководство пользователя

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Planning GroupWise in a NetWare Cluster 33
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After you have filled out the IP Address Worksheet, transfer the secondary IP addresses and cluster-
unique port numbers from the IP Address Worksheet to the System Clustering Worksheet and the
Agent Clustering Worksheet so that they are available in the sequence in which you will need them
as you set up GroupWise in a cluster.
2.8.2 Determining Appropriate Failover Paths for the Agents
By default, a GroupWise volume is configured to have all nodes in the cluster in its failover path,
organized in ascending alphanumeric order. Only one node at a time can have a particular
GroupWise volume mounted and active. If a GroupWise volume’s preferred node fails, the volume
fails over to the next node in the failover path. You will want to customize the failover path for each
GroupWise volume based on the fan-out-failover principle.
When a node fails, its volumes should not all fail over together to the same secondary node. Instead,
the volumes should be distributed across multiple nodes in the cluster. This prevents any one node
from shouldering the entire processing load typically carried by another node. In addition, some
volumes should never have the potential of being mounted on the same node during a failover
situation. For example, a post office and POA that service a large number of very active GroupWise
client users should never fail over to a node where another very large post office and heavily loaded
POA reside. If they did, users on both post offices would notice a decrease in responsiveness of the
GroupWise client.
SYSTEM CLUSTERING WORKSHEET
If you are setting up a new GroupWise system, under Item 6: Shared Volumes for GroupWise
Administration , specify secondary IP addresses for your GroupWise administration volumes.
Under Item 7: Shared Volume for Domain , use the domain MTA secondary IP address from the IP
Address Worksheet as the domain volume IP address.
If you are planning the post office on a different volume from the domain, under Item 8: Shared
Volume for Post Office , use the post office POA secondary IP address from the IP Address
Worksheet as the post office volume IP address.
AGENT CLUSTERING WORKSHEET
Under Item 4: MTA Network Information , transfer the secondary IP address and cluster-unique port
numbers for the MTA from the IP Address Worksheet to the Agent Clustering Worksheet.
Under Item 7: POA Network Information , transfer the secondary IP address and cluster-unique port
numbers for the POA from the IP Address Worksheet to the Agent Clustering Worksheet.
AGENT CLUSTERING WORKSHEET
Under Item 3: Domain Failover Path , list the nodes that you want to have in the domain volume
failover path. The MTA might need to run on any node that the domain volume fails over to.
If you are planning the post office on a different GroupWise volume from where the domain is located,
under
Item 6: Post Office Failover Path , list the nodes that you want to have in the post office volume
failover path. The POA might need to run on any node that the post office volume fails over to.