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RAC, extra nodes, load-balancing and failover

From: PdV <piet.de.visser_at_cmg.com>
Date: 13 Dec 2002 00:43:11 -0800
Message-ID: <6de2ae57.0212130043.50690481@posting.google.com>


Group,

We have installed OCFS and RAC on an HP-proliant cluster, on RH 21 AS. So far it works well, including failovers. It even scales surprisingly well.

Aim is a large database using cheap hardware, and scalability on demand by adding extra nodes and instances.
We aim for a clustered file system, want to avoid raw-devices, and would like software on CFS as well (single install, no replication).

We control the servers, but not the client-machines, more specific: we cannot modify Tnsnames on app-servers or on client-machines.

Question about adding extra nodes+instances to the cluster.

If we add an extra node and instance (add redo-, add undo-ts, add public thread...) and start the instance, say instance i3 on node n3, will new incoming connections be able to connect to it, and will load-balancing occur over the additional node as well as over the existing nodes ?

The new instance will be able to register with existing and new listeners, but the client-machines only know about the original two nodes in their tnsnames.ora.

More specific :

nb: apologies or not reading the whole FM (for sqlnet) up front.

Any thoughts ?

Regards,

PdV Received on Fri Dec 13 2002 - 02:43:11 CST

Original text of this message

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