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The paper addresses the issues of invoking services from within workflows which are becoming an increasingly popular paradigm of distributed programming.The main idea of our research is to develop a facility which enables load balancing between the available services and their instances. The system consists of three main modules: a proxy generator for a specific service according to its interface type, a proxy that redirects requests to a concrete instance of the service and load-balancer (LB) to choose the least loaded virtual machine (VM) which hosts a single service instance. The proxy generator was implemented as a bean (in compliance to EJB standard) which generates proxy according to the WSDL service interface description using XSLT engine and then deploys it on a GlassFish application server using GlassFish API, the proxy is a BPEL module and load-balancer is a stateful Web Service.
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Czasopismo
Rocznik
Tom
Strony
45--59
Opis fizyczny
Bibliogr. 11 poz., rys., wykr., tab.
Twórcy
autor
- AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics, Department of Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
autor
- AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics, Department of Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
autor
- AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics, Department of Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
autor
- AGH University of Science and Technology, ACC Cyfronet AGH, ul. Nawojki 11, 30-059 Krakow, Poland
autor
- AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics, Department of Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
Bibliografia
- [1] Urban flood. http://urbanflood.eu/aboutus.aspx, 2012.
- [2] The openesb wiki. http://wiki.open-esb.java.net, July 2012.
- [3] Ws bpel, version 2.0. http://docs.oasis-open.org/wsbpel/2.0/OS/wsbpel-v2.0-OS.pdf, July 2012.
- [4] Bourke T.: Server Load Balancing. O’Reilly, 2001.
- [5] Cetnarowicz K., Drezewski R.: Maintaining functional integrity in multi-agent systems for resource allocation. Computing and Informatics, 29:947–973, 2010.
- [6] Cetnarowicz K., Gruer P., Hilaire V., Koukam A.: A formal specification of magent architecture. In From theory to practice in multi-agent systems : second international workshop of Central and Eastern Europe on Multi-Agent Systems, CEEMAS 2001, pp. 62–72, 2001.
- [7] Deelman E., Gannon D., Shields M., Taylor I.: Workflows and e-science: An overview of workflow system features and capabilities. Future Generation Computer Systems, 25(5):528–540, 2009.
- [8] Janhavi B., Surve S., Prabhu S.: Comparison of load balancing algorithms in a grid. In Proc. of IEEE International Conference on Data Storage and Data Engineering (DSDE), Feb. 2010, Bangalore, India, pp. 20–23, 2010.
- [9] Pinedo M. L.: Scheduling. Theory, Algorithms and Systems. Springer, 2008.
- [10] Porter G., Katz R. H.: Effective web service load balancing through statistical monitoring. Commun. ACM, 49(3):48–54, March 2006.
- [11] Tarreau W.: Making applications scalable with load balancing. http://www.exceliance.fr/sites/default/files/biblio/ art-2006-making_applications_scalable_with_lb.pdf, September 2006.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-AGH1-0031-0004