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  • The Inria's Research Teams produce an annual Activity Report presenting their activities and their results of the year. These reports include the team members, the scientific program, the software developed by the team and the new results of the year. The report also describes the grants, contracts and the activities of dissemination and teaching. Finally, the report gives the list of publications of the year.

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Section: New Results

A learning-based approach to optimizing large-scale data analytics

As part of my PhD thesis of K. Zaouk, we have proposed two neural network architectures to support in-situ modeling of user objectives in large-scale data analytics. Although conceptually these architectures can work with any big data system, the modeling of user-objectives on analytics run was applied on Spark Streaming. In our problem settings where only few traces are run whenever a new workload is submitted to the cloud, we have proposed new optimizations to improve the accuracy and efficiency of the auto-encoder based architecture. Thus, we have developed a prototype that included these neural network architectures and optimizations. This prototype was then used to evaluate a benchmark of stream analytics that we developed and instrumented on top of two clusters that collect Spark Streaming workloads' traces.

We analyzed the performance of the proposed techniques and demonstrated their performance benefits over state of the art performance modeling techniques based on machine learning (such as Ottertune used in tuning traditional RDBMS). Our latest results show that we outperform Ottertune in robustness and in our problem settings. These results consolidated in a paper “Boosting Big Data Analytics with Deep Learning Models and Optimization Methods” submitted for publication, alongside with other scientific results in multi-objective optimization contributed by the co-author Fei Song. Work on this topic continues.