Ongoing Lessons from the Cluster Lab

It’s been a while since I worked on my cluster lab. The first thing that I did was to tear down the old cluster and start over from scratch. The first lesson from this round of testing came when the cluster administrator scanned the hardware resoruces and threw a warning message that stated that only one adapter was found on the node. This warning is caused by fact that the two cluster nodes are interconnected via a crossover cable and the second node is shut down. With the node shut down, there is no physical layer link on the Ethernet card, so the OS thinks that the cable is disconnected.

I got past the error by simply plugging the cluster member’s private network connection into a spare switch that I had lying around. This provided a physical layer link which was what the OS needed to report a valid network connection. After that I rescanned the resources and the cluster installation proceeded.

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