Is there such a thing as the node master RAC cluster?

The GI version: 11.2.0.4

Operating system: Linux/Unix platforms

Cluster CARS being an ACTIVE configuration / ASSET, is there such a thing as master node in a RAC cluster?

If there is such a thing as a master node, in a 4-node RAC cluster, how can I find which is the "master" node and why it is called a "master node"?

Unlike some cluster systems, it is not really a "master node" for Oracle Grid Infrastructure. This link of @rchem to the Uwe Hesse blog entry contain information about a master node but note carefully the specific tasks for this master.

Oracle clustered systems have resources. Everything is a resource. The listener is a resource. The instance is a resource. A block of data is a resource. Each resource has a master node and that node may be all in the cluster. And resources of the same type can have different masters. If just because Node1 is the master of the resource for blockXYZ does mean that Node1 is the master of the resource for all blocks. BlockABC can have his mastery of the resource on Node2.

Most people think of a master node like the one that makes decisions for the rest of the cluster. For example, here is a link to a Dell article: http://en.community.dell.com/techcenter/high-performance-computing/w/wiki/hpc-cluster-nodes

In this article, it says "the General function of the master node must be the mastermind behind the group." However, GI of Oracle cluster doesn't have this concept. There is no a node responsible for the rest of them. All decisions that need to be made are distributed on all nodes of the cluster, piece meal.

HTH,

Brian

Tags: Database

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