I want to set up a cluster for scientific computing (mainly statistical stuff with R). I have a few conceptual questions.
First, is there a difference between a Beowulf cluster and a cluster that has single-system image ("SSI," e.g. using openSSI or LinuxPMI)? If so, what's the difference?
Second, if there is a difference between Beowulf and SSI, which one is better for scientific computing?
Third, does using Eucalyptus make sense for scientific computing or is this more suitable for IO-oriented operations such as web service or databases?
Fourth, is there some other technology that I should pay attention to that I have not named here?