Virtual address FRO each node

Hello

We just install a GR 2 RAC 11. It was much easier to install and better documented than we've seen in about a year, when you do the same thing with Oracle 10 g 2.

The only thing that I have not reallly understand why we need the virtual IP addresses for every node in the cluster, since we have a virtual IP address (CT) for the cluster.

What is the purpose of these VIP addresses (for each node)?

Kind regards.

Carl

Hello

The SCAN IP and IP VIP work together.

The connection of clients to the database is not established by IP SCAN but by VIP IP.

The address IP of VIP is not rejected because it is part of the architecture of the cluster.

When a listener to SCAN (SCAN VIP) receives a connection request, the listener ANALYSIS will check the instance less responsible for providing the requested service.
It will then redirect the connection request to the local listener on the node where the least loaded instance runs. Subsequently, the customer will be given the address of the local listener.
Local listener in this context, the LOCAL_LISTENER parameter must be considered. The LOCAL_LISTENER parameter must be set to the node-VIP. If you need domain names, make sure that LOCAL_LISTENER is set to the full domain name (e.g., node - VIP.example.com) will be finally create the connection to the database instance.

Read this technical article Oracle.

http://www.Oracle.com/technetwork/database/clustering/overview/scan-129069.PDF

Kind regards
Levi Pereira

Tags: Database

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