What is Oracle RAC
Oracle RAC stands for Real Application clusters which is a high availability solution from Oracle. It is one of the best solutions till now in all database technologies from Oracle. Oracle RAC using shared everything architecture. In Oracle RAC, All nodes(instances) access the same data and perform read/write operations. Basically, Oracle RAC achieves zero downtime. If one Node(instance) in Oracle RAC got crashed in Oracle RAC it will switch transactions to another Node(instance). The main beauty of Oracle RAC is you can add and remove nodes(instance) on your needs so you can scale up/down. Oracle RAC works with clustering which has advantages and gives you to avoid a single point of failure.
More on Oracle RAC
source:- oracle
5 Key Points to remember for Oracle RAC:-
source:- oracle1. Oracle RAC, achieve better performance and high availability as compare to other present solution in the market.
2. Oracle RAC, scale up/down feature helps to control the cost. You can easily add and remove nodes from RAC environment In a high load situation you can add one or more nodes and when no load can delete the node. This management is very easy.
3. Oracle RAC, Works well with data consistency as all nodes updates data separately and users still see real-time data.
4. Oracle RAC, Easy to manage to patch as all node(instance) is independent on resources.
5. Oracle RAC, When one node(instance) got crashed all connection moves to the next available node(instance). Please note that only select statements move.
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1. Oracle RAC, achieve better performance and high availability as compare to other present solution in the market.
2. Oracle RAC, scale up/down feature helps to control the cost. You can easily add and remove nodes from RAC environment In a high load situation you can add one or more nodes and when no load can delete the node. This management is very easy.
3. Oracle RAC, Works well with data consistency as all nodes updates data separately and users still see real-time data.
4. Oracle RAC, Easy to manage to patch as all node(instance) is independent on resources.
5. Oracle RAC, When one node(instance) got crashed all connection moves to the next available node(instance). Please note that only select statements move.