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A single system image (SSI) is a distributed computing method in which the system hides the distributed nature of the available resources from the users. The computer cluster, therefore, appears to be a single computer to users. This property can be enabled through software mechanisms or extended hardware.
An SSI presents users with a globalized view of all the resources in the cluster, irrespective of the nodes to which they are physically connected, while hiding the fact that they are associated with different nodes. SSI also ensures multiprocessing and an even load balancing among the systems. The machines focus on system availability, scalable performance and transparency of resource management.
The features of a single system image include:
The benefits of using a single system image include: