What is a SQL database cluster?

Microsoft Windows Failover Clustering is a high-availability option designed to increase the uptime of SQL Server instances. A cluster includes two or more physical servers, called nodes; identical configuration is recommended.

Also to know is, what is a cluster database in Oracle?

Oracle RAC enables you to cluster Oracle databases. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers so they operate as a single system. Oracle Clusterware is a portable cluster management solution that is integrated with Oracle Database.

What is a node in a cluster?

A server cluster is a group of independent servers running Windows Server 2003, Enterprise Edition, or Windows Server 2003, Datacenter Edition, and working together as a single system to provide high availability of services for clients.

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