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Microsoft SQL Server 2008 High Availability by Hemantgiri S. Goswami

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Types of clusters

There are four types of clustering solutions available with SQL Server 2008, which are the following:

  • Failover Cluster: Single-instance Cluster
  • Failover Cluster: Multi-instance Cluster
    • All nodes with active instances
    • N+1
  • Failover Cluster: Multi-site Cluster
  • Failover Cluster: Guest Cluster

Single-instance Cluster

This is the most common and widely used architecture for configuring SQL Server clusters. In this type of clustering, there will be two participating nodes in which one will be active or owner of the resources and the second will be passive. Whenever something crashes or fails, the active node passes ownership of all the resources to the second node — this is called failover.

As there is only a single node that is active or ...

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