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Microsoft SQL Server 2008 High Availability by Hemantgiri S. Goswami

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What is clustering?

Before starting with SQL Server clustering, let's have a look at clustering in general and Windows clusters.

The word Cluster itself is self-descriptive — a bunch or group. When two or more than two computers are connected to each other by means of a network and share some of the common resources to provide redundancy or performance improvement, they are known as a cluster of computers.

Clustering is usually deployed when there is a critical business application running that needs to be available 24 X 7 or in terminology — High Availability. These clusters are known as Failover clusters because the primary goal to set up the cluster is to make services or business processes that are business critical available 24 X 7. MS Windows ...

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