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Realistic scenarios as a basis for requirements and to reflect the design against.

Simple fault tolerance and scalability

To achieve fault tolerance and load balancing there are may exist one or more slaves of a server. The slaves should reflect the configuration state of the main server. So changes only need to be made on the main server and are replicated to the slaves. The load needs to be distributed over the existing servers. The distribution may be part of the Karaf solution or may be done by external hardware. The running applications can be splitted into stateless and statefull. In the stateless case each request may be processsed by each server. In the statefull case requests from one source need to either all go to the same node again or the state needs to be replicated on the nodes. A key question here is if statefull processing is supported by the clustering solution or not.

Management and Provisioning for a Network of servers

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High Performance computing

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Existing solutions

• Cellar
• Fuse Fabric
• ACE