What is the main purpose of Oracle Real Application Clusters (RAC)?
Oracle Real Application (RAC) provides the interaction of executable file with the Oracle database.
It allows the running of any packaged or custom built application with the Oracle database that is running on a server pool.
It provides very high level of availability, flexibility and scalability to run the application and store it to the database.
It creates the database such that if the pool fails then the database is continued to run from the remaining servers and the load can be distributed.
It makes it easier for the administrator to maintain many servers at the same time by load-balancing techniques and providing provision to add more and more servers when the load increases.
Where are the Clusterware files stored on a RAC environment?
The Clusterware is installed on each node (on an Oracle Home) and on the shared disks (the voting disks and the CSR file)
What is SCAN?
Single Client Access Name (SCAN) is s a new Oracle Real Application Clusters (RAC) 11g Release 2 feature that provides a single name for clients to access an Oracle Database running in a cluster. The benefit is clients using SCAN do not need to change if you add or remove nodes in the cluster.
What is required by Oracle RAC database to connect to a network?
Oracle RAC requires an active connection of the network to the LAN (Local Area Network) so that the database server can be found and connected.
The database server is further having connections with application servers that store the applications and allow user to transfer their data.
The connection is required with the server pool so that the transfer of services and applications can be done on demand basis.
The interconnection between the networks is really important as it has to maintain the overall flow of the pools and the resources.
Oracle RAC provides support to redundant interconnects relatively and it provides an overall infrastructure solution.
The load balancing and inter-node messaging can be handled more carefully when the networks or the servers are interconnected to each other.
How is possible to install a RAC if we don’t have a CFS?