2009/9/23 J Lee Hughes <[email protected]>: > 1. > with a cluster > can the controller powered up node's' when it is need > and > can the controller powered down node's' when it is not need
That depends. The answer is yes if a) the nodes (servers) in the cluster are equipped with IPMI management cards or b) the nodes (servers) are powered from intelligent mains power distribution units The question I think you are asking is that if the cluster load is low then will nodes (servers) be powered down. The answer is yes, some schedulers (load levellers) offer this facility. > 2. > that is the different between a computer cluster, computer ray, and computer > grid! A compute cluster would be a set of nodes (servers) in one physical location, linked by a LAN or a cluster interconnect. It is presented to the user as one set of resources. A grid is a geographical diverse set of resources - a users task may be moved to the most appropriate part of the grid to be executed. A ray - search me. Never heard the term. _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
