RAC Nodes at Different OS Levels - Using Both Independently
Kind of a confusing title for this post but...
We started out with a 4 node RAC cluster with the OS version on each node being OEL 5.1. We since shut down 2 of the nodes and upgraded the OS on those nodes to 5.7. We shut the entire cluster down, and brought up the 2 upgraded nodes and have been running successfully with 2 nodes. The nodes still at 5.1 are technically in the cluster ( have not been dropped ), but never are brought up.
Is it possible to shut down the current 5.7 nodes and bring up the 5.1 nodes without issues? The reason I ask is that the newer nodes were somehow patched from 5.1 to 5.7 and there seems to be some issues in upgrading the PowerPath drivers on the servers. The questions have been raised to me if we can bring up the cluster with the old nodes...
We started out with a 4 node RAC cluster with the OS version on each node being OEL 5.1. We since shut down 2 of the nodes and upgraded the OS on those nodes to 5.7. We shut the entire cluster down, and brought up the 2 upgraded nodes and have been running successfully with 2 nodes. The nodes still at 5.1 are technically in the cluster ( have not been dropped ), but never are brought up.
Is it possible to shut down the current 5.7 nodes and bring up the 5.1 nodes without issues? The reason I ask is that the newer nodes were somehow patched from 5.1 to 5.7 and there seems to be some issues in upgrading the PowerPath drivers on the servers. The questions have been raised to me if we can bring up the cluster with the old nodes...
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