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Gunnar Brataas

Senior Scientist

Gunnar Brataas

Senior Scientist

Gunnar Brataas
Phone: 472 36 938
Mobile: 472 36 938
Department: Software Engineering, Safety and Security
Office: Trondheim

publications and responsibilities

Publications

Publication

Analysing Evolution of Work and Load

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1399494

Evolution of work and load is required for investigating elasticity and cost-efficiency of cloud computing applications as well as their underlying architecture. Existing modelling environments have fixed load and work, therefore rendering model-and-analyse approaches infeasible for such application...

Authors Brataas Gunnar Stav Erlend Lehrig Sebastian
Year 2016
Type Presentation
Publication

Analysing Evolution of Work and Load

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1399602

Evolution of work and load is required for investigating elasticity and cost-efficiency of cloud computing applications as well as their underlying architecture. Existing modelling environments have fixed load and work, therefore rendering model-and-analyse approaches infeasible for such application...

Authors Brataas Gunnar Stav Erlend Lehrig Sebastian
Year 2016
Type Conference paper/Book chapter
Publication

CloudStore - towards scalability benchmarking in Cloud computing

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1286173

This paper describes CloudStore, an open source application that lends itself to analyzing key characteristics of Cloud computing platforms. Based on an earlier standard from transaction processing, it represents a simplified version of a typical e-commer...

Authors Sanders Richard Liodden Brataas Gunnar Cecowski Mariano Haslum Kjetil Ivansek Simon Polutnik Jure Viken Brynjar
Year 2015
Type Journal article
Publication

Towards Bridging the Gap Between Scalability and Elasticity

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1140824

Scalability and elasticity are key capabilities to tackle the variable workload of a service. Cloud elasticity offers opportunities to manage dynamically the underlying resources of a service and improve its scalability. However, managing scalability of cloud-based systems may lead to a management o...

Year 2014
Type Conference paper/Book chapter
Publication

CloudScale: Scalability Management for Cloud Systems

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1028690

This work-in-progress paper introduces the EU FP7 STREP CloudScale. The contribution of this paper is an overall description of CloudScale's engineering approach for the design and evolution of scalable cloud applications and services. An Electronic Health Record (EHR) system serves as a motivation ...

Authors Brataas Gunnar Stav Erlend Lehrig Sebastian Becker Steffen Kopcak Goran Huljenic Darko
Year 2013
Type Conference paper/Book chapter
Publication

Scalability Testing of MS Lync Services: Towards Optimal Provisioning of Virtualised Hardware

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1028700

A method for scalability testing of the Microsoft Lync 2010 communication system is presented, exploring the relation between system size and system load. The method can be used for optimal provisioning, balancing user Quality of Experience (QoE) with equipment volume and energy consumption. Observi...

Authors Rygg Knut Helge Brataas Gunnar Millstein Geir Molle Terje
Year 2013
Type Conference paper/Book chapter
Publication

Scalability Analysis of Underwater Sensor Networks

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1080383

While underwater acoustic sensor networks (UWSN) are still considered to be in their development phase, professional users are starting to understand their future potential. For example, large areas encircling offshore oil installations need to be environmentally supervised. UWSNs consisting of a la...

Year 2013
Type Conference paper/Book chapter
Publication

Scalability Analysis of Underwater Sensor Networks

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1080382

While underwater acoustic sensor networks (UWSN) are still considered to be in their development phase, professional users are starting to understand their future potential. For example, large areas encircling offshore oil installations need to be environmentally supervised. UWSNs consisting of a la...

Year 2013
Type Presentation
Publication

Performance property prediction supporting variability for adaptive mobile systems

http://www.sintef.no/en/publications/publication/?pubid=SINTEF+S20524

A performance property prediction (PPP) method for component-based self-adaptive applications is presented. Such performance properties are required by an adaptation middleware for reasoning about adaptation activities. Our PPP method is based on the Structure and Performance (SP) framework, a conce...

Authors Brataas Gunnar Jiang Shanshan Reichle Roland Geis Kurt
Year 2011
Type Conference paper/Book chapter
Publication

A Basis for Performance Property Prediction of Ubiquitous Self-Adapting Systems

http://www.sintef.no/en/publications/publication/?pubid=SINTEF+S3836

Utility-based adaptation approaches permit to determine the “best” suited variant of an application at run-time. Utility policies are usually specified in terms of resources and QoS dimensions. Although utility policies provide a precise formulation for adaptation decision, they are difficult to spe...

Authors Brataas Gunnar Floch Jacqueline Romain Rouvoy Pyrros Bratskas George A. Papadopoulos
Year 2007
Type Conference paper/Book chapter
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