Implementing fine and coarse grained payment mechanisms using WebCom

In a Grid environment applications are executed on distributed resources. Applications can be divided into separate parts for distributed and sequential execution. Typically, complete applications consisting of many parts may be executed on both local and remote resources. Computing resources may expect some form of payment in exchange for services used. In this situation there are two scenarios where credit can be claimed: either in increments by executing parts of an application(fine grained) or by executing a complete application(coarse grained). This paper presents fine and coarse grained Condensed Graph applications and methods adopted for secure submission of applications. It also contrasts the payment mechanism for these approaches in WebCom. Many grid middlewares such as PBS, Torque, LSF and others employ a coarse grained approach for application distribution. Fine grained execution is partially supported by subdividing the application. Here we show both fine grain and coarse grain approaches to application distribution.