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Oracle RAC Concept
Oracle Real Application clusters allow multiple instances to access a single database, the instances will be running on multiple nodes. In a standard Oracle configuration, a database can only be mounted by one instance but in a RAC environment, many instances can access a single database
I have a doubt here.
My understanding is that we use Oracle RAC database as similar to standalone oracle database? My question is are instances and nodes are same? Do we use them for login purpose.
My assumption is that they are used only for high availability. If one node goes down , other surviving node will take over the user connections.
What is the purpose of Oracle RAC instances here? Can someone please clarify my doubt?