12c ASM: Moving the Existing Cluster Mode to Flex Cluster
In Oracle Flex ASM architecture, Oracle ASM instances can run only a small number of cluster nodes. These ASM instances are connected by all the database instances on the cluster to provide storage access for all these database instances. When an ASM instance fails, the database instances reconnect to other ASM instances for the failed ASM instance. This features supports the platform for variety of application which includes RAC with large number of nodes. There is a new type of network, ASM network with Flex ASM which is used for communication between ASM and its clients. ASM network is accessible from all nodes. In oracle Flex Cluster, the nodes are arranged in two ways i.e. Hub Node and Leaf Node. Hub Nodes : tightly connected with each other like standard configuration and have direct access to the shared storage. Leaf nodes: Leaf nodes can be added as many as more and can host different applications other than hub nodes. This type of nodes doesn't require direct ac...