| The OGSA architecture working group defines a number of use cases from a wide variety of application scenarios including those related to e-science and e-business applications. The main purposes of these use cases are: -
To identify and define core OGSA platform functionalities -
To define core platform components based on the functionality requirements -
To define the high-level requirements on these core components and identify their interrelationship These use cases are defined as part of the OGSA-WG charter definition specified by GGF, which says, "To produce and document the use cases that drive the definition and prioritization of OGSA platform components, as well as document the rationale for our choices." As we can see, some of these use cases defined below from the e-business and e-science world helps identify the general OGSA platform features, components, and their interrelationships. This will pave the way for the detailed discussion on the OGSA architecture platform components. Here are the representational use cases from the OGSA Architecture working group, [1] which we will use in our discussion: -
Commercial Data Center (Commercial Grid) -
National Fusion Collaboratory (Science Grid) -
Online Media and Entertainment (Commercial Grid) We will discuss the core aspects, scenarios, and the requirements drawn from these use cases. This will form the basis for our discussion on the OGSA core platform component. | 