148 Workflow Management and Execution Using BeesyCluster
1. Regular files stored within Cluster/Servers can contain data, either in-
put or output for services.
2. Some files can be used as resources within specific standards of services.
For instance, the WSRF specification [53] allows a service to operate on
a resource, which can be a file, and store there data corresponding to
the current state.
3. Executables stored within Cluster/Servers can be run as either sequen-
tial or parallel (e.g., using MPI) applications.
Each Cluster/Server holds several SystemAccounts that correspond to user
accounts in the operating system installed on the given cluster or server. Each
User has a single account in the middleware which is associated with zero or
more SystemA ...