QoS-A ware service selection for web service composition

Download

index.pdf

Date

2012

Author

Abdyldaeva, Rahat

Metadata

Show full item record

Item Usage Stats

144
views

80
downloads

Composition of web services is one of the flexible and easiest approaches for creating composite services that fulfill complex tasks. Together with providing convenience in creation of new software applications, service composition has various challenges. One of them is the satisfaction of user-defined Quality of Service (QoS) requirements while selecting services for a composition. Load balancing issue is another challenge as uncontrolled workload may lead to violation of service providers’ QoS declarations. This thesis work proposes a QoS aware method for optimum service composition while taking into account load balancing. M/M/C queuing model is utilized for the individual services to determine sojourn time distribution for possible compositions. Percentile of the execution time, price and availability are considered as QoS parameters. Proposed algorithm selects the optimum composition according to QoS constraints and utility provided by the services. The performance of the method is evaluated by custom simulation software and is compared to two other methods, random selection and average execution timebased optimal service selection.

Subject Keywords

Web services., Web site development., Queuing theory.

URI

http://etd.lib.metu.edu.tr/upload/12614369/index.pdf
https://hdl.handle.net/11511/21564

Collections

Graduate School of Informatics, Thesis

Suggestions

OpenMETU
Core

WSLA Extensions for Managing Composite Semantic Web Services Elgedawy, Islam (2016-09-30) Managing Service Level Agreement (SLA) for composite semantic web services is a very complex process, as it involves many complex tasks such as components discovery, provisioning, monitoring, recovery, and coordination. Indeed, managing all these tasks manually is a very cumbersome operation, nevertheless it is time consuming and prone to errors. To overcome such problems, automated SLA management for composite semantic web services is needed. This requires the SLA of the composite service to be described i...
Query interface and query language for domain specific web service discovery system Özdil, Hilal; Karagöz, Pınar; Department of Computer Engineering (2011) As the number of the published web services increase, discovery of the web services with the desired functionality and quality is becoming a challenging process. Selecting the appropriate web services among the ones that o er the same functionality is also a challenging task. The web service repositories like UDDI (Universal Description Discovery and Integration) support only the syntactic searchs. Quality of service parameters for the published web services can not be queried over these repositories. We ha...
Automated Web Services Composition with the Event Calculus Aydin, Onur; Çiçekli, Fehime Nihan; Cicekli, Ilyas (2007-10-24) As the web services proliferate and complicate it is becoming an overwhelming job to manually prepare the web service compositions which describe the communication and integration between web services. This paper analyzes the usage of the Event Calculus, which is one of the logical action-effect definition languages, for the automated preparation and execution of web service compositions. In this context, abductive planning capabilities of the Event Calculus are utilized. It is shown that composite process ...
Automatic quality of service (QOS) evaluation for domain specific web service discovery framework Aşkaroğlu, Emra; Karagöz, Pınar; Department of Computer Engineering (2011) Web Service technology is one of the most rapidly developing contemporary technologies. Nowadays, Web Services are being used by a large number of projects and academic studies all over the world. As the use of Web service technology is increasing, it becomes harder to find the most suitable web service which meets the Quality of Service (QoS) as well as functional requirements of the user. In addition, quality of the web services (QoS) that take part in the software system becomes very important. In this t...
Improved Genetic Algorithm based Approach for QoS Aware Web Service Composition Yilmaz, A. Erdinc; Karagöz, Pınar (2014-07-02) Use of web services is one of the most rapidly developing technologies. Since web services are defined by XML-based standards to overcome platform dependency, they are very eligible to integrate with each other in order to establish new services. This composition enables us to reuse existing services, which results in less cost and time consumption. One of the recent problems with web service composition is to maximize the overall Quality of Service (QoS) of the composed service. Most common elements of QoS...

Citation Formats

R. Abdyldaeva, “QoS-A ware service selection for web service composition,” M.S. - Master of Science, Middle East Technical University, 2012.