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Oracle Real Application Clusters

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What is Oracle Real Application Clusters?

Oracle Real Application Clusters (RAC) allow customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability, while accessing shared storage. User sessions connecting to Oracle RAC instances can failover and safely replay changes during outages, without any changes to end user applications, hiding the impact of the outages from end users.

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Oracle Real Application Clusters Reviews

What users are saying about Oracle Real Application Clusters.
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Oracle Real Application Clusters - A great solution from Oracle to gain optimal scalable solution with high availability.

Incentivized
Verified User
Consultant in Information Technology (501-1000 employees employees)

Use Cases and Deployment Scope

Being an Oracle consultant, I have come across many times where customers seek solutions to problems where they face issues with scalability or load balancing or performance issues on their application. Oracle Real Application Clusters also helps with failover solutions with almost no outage to the business. This allows customers to run a single Oracle Database across multiple servers in order to maximize availability and enable horizontal scalability.

Pros

  • Horizontal scalability
  • Seamless failover
  • No impact on business during failover

Cons

  • Oracle Real Application Clusters is totally dependant on DBA's . It would be great if it can be simplified somehow
  • Its license cost
  • Enabling usage in standard edition

Most Important Features

  • Horizontal scalability which enables addition of extra nodes
  • Failover
  • Application traffic load balance

Return on Investment

  • Outage on application downtime has greatly reduced
  • Customers confirmed, performance wise, it has been better after deployment of Oracle Real Application Clusters
  • Shared storage

Alternatives Considered

Microsoft SQL Server

Other Software Used

Oracle GoldenGate, Oracle Application Express, Oracle Database