What is Oracle RAC cluster?

What is Oracle RAC cluster?

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.

What is RAC and non RAC database?

Oracle RAC allows multiple computers to run Oracle RDBMS software simultaneously while accessing a single database, thus providing clustering. In a non-RAC Oracle database, a single instance accesses a single database. The database consists of a collection of data files, control files, and redo logs located on disk.

What is Oracle RAC One Node?

Oracle Real Application Clusters (RAC) One Node is an option to the Oracle Database Enterprise. Edition that was introduced with Oracle Database 11g Release 2. It provides enhanced high availability. for single instance Oracle Databases, protecting them from both, planned and unplanned downtime.

What is difference between standalone and RAC database?

In a single-instance database, there is a one-to-one relationship between the instance and the database. An instance can access one and only one database. With Oracle RAC, there are multiple instances for one database. Each instance runs on a separate database server, called a node in the cluster.

What is RAC aware application?

From my undestanding, a “RAC aware” application is an application which will be deployed and using an Oracle RAC environment. For clustered environments, sometimes applications need to take some special considerations, that will vary between providers.

Is Oracle RAC supported on AWS?

You can now deploy scalable Oracle Real Application Clusters (RAC) on Amazon EC2 using the recently-published tutorial and Amazon Machine Images (AMI) on AWS Marketplace.

How does RAC One node work?

RAC One Node is a multiple-instance of RAC running on a single node in a cluster and has a fast instance relocation feature in the event of a catastrophic or instant server failure. RAC works as a live-live solution.

What is a node in Oracle RAC?

What is CSSD and Crsd in Oracle RAC?

Oracle Cluster Synchronization Services daemon (CSSD) Cluster Ready Services daemon (CRSD), which is the main engine for maintaining availability of resources. Event Manager daemon (EVMD)