General information
Offer title : Researcher - Reducing the memory footprint of virtualized servers: energy efficiency and sufficiency (M/F) (H/F)
Reference : UMR7271-MAGRIC-007
Number of position : 1
Workplace : VALBONNE
Date of publication : 04 September 2025
Type of Contract : Researcher in FTC
Contract Period : 13 months
Expected date of employment : 1 January 2026
Proportion of work : Full Time
Remuneration : Between €3,021.50 and €3,451.50 gross monthly salary depending on experience.
Desired level of education : Doctorate
Experience required : Indifferent
Section(s) CN : 06 - Information sciences: bases of information technology, calculations, algorithms, representations, uses
Missions
We are looking for a post-doctoral researcher to work on adapting the hardware footprint, and in particular the memory, of traditional virtualized servers such as web servers, databases, or streaming servers, for example. While processors and network interface cards can be time-multiplexed, RAM is spatially shared. Memory is therefore often the bottleneck when dimensioning and operating data centers. The candidate will have to propose mechanisms that are as generic and adaptive as possible, i.e., mechanisms that do not require precise knowledge of the semantics of the hosted application and that adapt to its load variations over time. The energy efficiency of the solution will have to be evaluated at the level of the entire life cycle of a data center. The final objective is to use these mechanisms with sobriety in mind, i.e., by constraining (ideally) all environmental costs.
Activities
The successful candidate will be responsible for the following tasks:
- Profiling the memory footprint of typical services, including their dynamics;
- Building scenarios (service selection) and loads (demand variation);
- Developing memory control mechanisms that are as agnostic as possible regarding the services selected in the scenarios;
- Testing on Grid 5000-type server clusters, with energy profiling.
- Testing on distributed data centers built using recovered hardware and hosted on private premises (e.g., the Deuxfleurs service) and studying the energy efficiency and sobriety achievable through these solutions.
Skills
Knowledge:
- Operating systems, particularly Linux;
- Virtualization of IT services;
- Scripting and orchestration of IT components.
Expertise:
- Development of automated and flexible software testbeds;
- Physical and virtual energy measurements of IT systems;
- Life cycle assessment of digital solutions.
Work Context
This position is available within the SIGNET team - COMRED Pole of the i3S UMR 7271 Laboratory in Sophia Antipolis. The Laboratory for Computer Science, Signals and Systems at Sophia Antipolis (i3S), set up in 1989, conducts research in computer science. With a staff of nearly 300, including professors and researchers from the Université Côte d'Azur, CNRS and Inria researchers, administrative and technical staff, doctoral students and trainees, it is one of the largest public laboratories on the Côte d'Azur and was one of the first to be established in the Sophia Antipolis technology park.
Constraints and risks
None