Abstract: A computer system has a managing server for managing one or more managed nodes. The managed nodes have media encoded with test executables executable on their respective nodes. The test executables can check configuration data for the node and/or check whether external resources are accessible from the node. The managing server issues commands to run the test executables and collects test results returned by the test executables.

Abstract: A method, and a corresponding apparatus, implemented on a suitably programmed processor, selects an ideal computer to remove from a computer cluster observing a failure condition. The computer cluster includes multiple computers. The method includes the steps of recording, at each of the computers, health data for each of the computers, computing, at a health timeout, a first health score for each of the computers based on the health data, computing, at a fatal timeout, and based on the first health score, a second health score for each of the computers, and at each of the computers, selecting a computer having the highest health score for removal from the cluster.

Abstract: A computing system includes a first processor, a second processor, a first data storage device and a second data storage device. A first network connects the first processor to the second processor. A second network connects the first processor to the first storage device and connects the second processor to the first storage device. A third network connects the second processor to the second storage device and connects the second processor to the second storage device. The first data storage device has a first cluster quorum lock. The second data storage device has a second cluster quorum lock.