Web Services Composite Web Service LWKR SJF Scheduling Admission Control
Institute of Mathematics and Informatics Bulgarian Academy of Sciences
Serdica Journal of Computing, Vol. 1, No 3, (2007), 267p-278p
Composite Web Services (CWS) aggregate multiple Web Services
in one logical unit to accomplish a complex task (e.g. business process).
This aggregation is achieved by defining a workflow that orchestrates the
underlying Web Services in a manner consistent with the desired functionality.
Since CWS can aggregate atomic and other CWS they foster the
development of service layers and reuse of already existing functionality. An
important issue in the deployment of services is their run-time performance
under various loads. Due to the complex interactions of the underlying
services, a CWS they can exhibit problematic and often difficult to predict
behaviours in overload situations. This paper focuses on the use of request
scheduling for improving CWS performance in overload situations. Different
scheduling policies are investigated in regards to their effectiveness in helping
with bulk arrivals.