Novell BUSINESS CONTINUITY CLUSTERING 1.2.1 - ADMINISTRATION, Руководство администратора

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Managing a Business Continuity Cluster 101
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Intersite Storage System Connectivity Is Lost
Recover the connection. If divergence of the storage systems occurred, remirror from the good side
to the bad side.
Intersite LAN Connectivity Is Lost
User connectivity might be lost to a given service or data, depending on where the resources are
running and whether multiple clusters run the same service. Users might not be able to access
servers in the cluster they usually connect to, but can possibly access servers in another peer cluster.
If users are co-located with the cluster that runs the service or stores the data, nothing additional is
required. An error is displayed. Wait for connectivity to resume.
If you have configured the auto-failover feature, see Appendix B, “Setting Up Auto-Failover,” on
page 137 .
11.6.2 Host-based Mirroring Failure Types and Responses
Host-based mirroring failure types and responses are described in the following sections:
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“Primary Cluster Fails but Primary Storage System Does Not” on page 101
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“Primary Cluster and Primary Storage System Both Fail” on page 101
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“Secondary Cluster Fails but Secondary Storage System Does Not” on page 101
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“Secondary Cluster and Secondary Storage System Both Fail” on page 102
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“Primary Storage System Fails and Causes the Primary Cluster to Fail” on page 102
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“Secondary Storage System Fails and Causes the Secondary Cluster to Fail” on page 102
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“Intersite Storage System Connectivity Is Lost” on page 102
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“Intersite LAN Connectivity is Lost” on page 102
Primary Cluster Fails but Primary Storage System Does Not
The initial response is to BCC migrate the resources to a peer cluster. Next, work to restore the failed
cluster to normal operations. The long-term response is total recovery from the failure. Do not
disable MSAP (Multiple Server Activation Prevention), which is enabled by default. When the
former primary cluster is recovered, bring up the former primary cluster servers, and fail back the
cluster resources.
Primary Cluster and Primary Storage System Both Fail
Bring up your primary storage system before bringing up your cluster servers. Then run the
Cluster Scan For New Devices
command from a secondary cluster server. Ensure that
remirroring completes before bringing downed cluster servers back up. Then bring up the former
primary cluster servers, and fail back the cluster resources.
Secondary Cluster Fails but Secondary Storage System Does Not
Secondary clusters are not currently running the resource. No additional response is necessary for
this failure other than recovering the secondary cluster. When you bring the secondary cluster back
up, the storage system is still secondary to the primary cluster.