Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What are Real Application Clusters (RAC)?

April 26, 2017application cluster Clusters database nodes Oracle providing RAC server

0

Posted

What are Real Application Clusters (RAC)?

1 Answer

0

Posted

Real Application Clusters (RAC) is the Oracle trade name for its database server cluster product and provides for load-balancing, scalability and automatic failover protection in case of server failure (the key word here being server failure not site failure, which is provided by Oracle’s DataGuard product). Essentially, Oracle RAC is a parallelization product that keeps the Oracle database server product available and running across a set of multiple server nodes providing Load-Balancing, Scalability, Flexibility and High-Availability. Technically, an Oracle RAC Cluster is group of two or more parallelized server nodes, linked together with each other through redundant network connections to form a singly logical machine, providing for load-balancing and high-availability against server failure typically within a small geographical site. Oracle RAC Extended Distance Clusters are also available to provide for site failure but are not recommended and, are rarely used due to the high cos