Maintaining QoS of the KOPI service in the BonFIRE cloud environment

Micsik András <>
MTA SZTAKI

Pataki Máté <>
MTA SZTAKI

Garzó András <>
MTA SZTAKI

The KOPI Online Plagiarism Search Portal – a nationwide plagiarism service in Hungary – is a unique, open service for web users that enables them to check for identical or similar contents between their own documents and the files uploaded by other authors. This check function works in any European language, due to our language-independent algorithm. The service was developed by the Department of Distributed Systems of MTA SZTAKI.

Most users of the KOPI service are professors working in and students of higher education, so the plagiarism searches are unevenly distributed throughout the year. Most searches occur at the time when the theses are due and there are also peaks when the press deals with plagiarism issues. During such times the load on the servers can be tenfold compared to the average load.

In the BonFire project we run experiments to validate scalability, elastic expansion in heterogeneous multi-cloud federated environment maintaining required endpoint QoS of input/output queues, and to evaluate the required monitoring functionalities.

Major research questions address the problem of how to maintain the required end-to-end QoS while adaptively reorganizing heterogeneous virtual machines intra- and intercloud, and how the monitoring aspects could influence both the elasticity and the endpoint QoS. These aspects could not be validated so far in our production environment thus BonFIRE provides the necessary complex infrastructure and monitoring facilities for experimenting with parameters set up. The KOPFire experiment contributes to the BonFIRE project objectives by validating and enhancing the tools for monitoring in heterogeneous federated cloud environments and by providing evaluation of QoS management strategies for BonFIRE environment.