BigData revolutionised the IT industry. It first interested the OLTP systems. Distributed Hash Tables replaced Traditional SQL databases as they guaranteed low response time on simple read/write requests. The second wave recast the data warehousing: map-reduce systems spread as they proved to scale linearly long-running computational workloads on commodity servers. The focus now is on real-time analytics. Being able to analyse massive quantities of data in a short time enables multiple HPC applications and interactive analysis and visualization. In this paper, we study the performance of a system that employs the DHT architecture to achieve fast in local analysis on indexed data. We observed that the number of keys, nodes, and the hardware characteristics strongly influence the actual scalability of the system. Therefore, we developed a mathematical model that allows finding the right system configuration to meet desired performance for each kind of query type. We also show how our model can be used to find the right architecture for each distributed application.

This work has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 720270 (HBP SGA1). It is also partially supported by grant SEV-2011-00067 of the Severo Ochoa Program awarded by the Spanish Government, the TIN2015-65316-P project, with funding from the Spanish Ministry of Economy and Competitivity, the European Union FEDER funds, and the SGR 2014-SGR-1051.

Peer Reviewed