Grid Computing Infrastructure Architecture Document

1.2.2   Cluster VS Grids

The key distinction between clusters and grids is mainly lie in the way resources are managed. In case of clusters, the resource allocation is performed by a centralized resource manager and all nodes cooperatively work together as a single unified resource. In case of Grids, each node has its own resource manager and don't aim for providing a single system view.

1.2.3   Computational Grids

Computational Grid is applying the resources of many computers in a network to a single problem at the same time - usually to a scientific or technical problem that requires a great number of computer processing cycles or access to large amounts of data.

1.2.4   Kernel

The kernel is the central program of any operating system. This is the program that talks directly to the hardware of the computer. Other programs make requests of the kernel to get something done on the computer. The kernel contains the most essential operating system services, such as task schedulers and interrupts handlers, and is always loaded whenever the operating system is active. It can call other operating system services (such as file or other I/O services) when requested by a user, a function, or an application.  

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