Distributed and Operating Systems

Prof. Dr. Boris Koldehofe and Team

DEBS 2024 Conference

Last week I visited the 18th Conference on Distributed and Event Based Systems (DEBS) in Lyon. Our research team has been very active in the topics of DEBS for many years as well as contributed to the organization of many instances of DEBS in the past.

Overall, this years edition showed that there is still a very active community. I enjoyed very good talks and papers on topics covering a wide range of topics related to distributed data and event processing, such as fundamentals, systems aspects, and programming paradigms. The research program, keynotes and tutorials presented covered deep insights into recent developments of data stream processing systems and data processing applications such as IoT and the DEBS Grand Challenge competition. 

Congratulations to the winners of the DEBS 10 Years Test of Time Award to Thomas Heinze, Zbigniew Jerzak, Gregor Hackenbroich, and Christof Fetzer for their work on “Latency-aware elastic scaling for distributed data stream processing systems.”

Thanks a lot, to the organizing team around Riccardo Tommasini, Angela Bonifati, Tillmann Rabl and Avrilia Floratou.  Looking forward to another edition organized by Vincenzo Gulisano and Marina Papatriantafilou in Gothenburg, Sweden in June 10-13, 2025. 

Finally, I would like to share some recent works of our team covering serveal interesting research directions in the context of DEBS.

  1. Bochra Boughzhala and Boris Koldehofe. In-Network Management of Parallel Data Streams over Programmable Data Planes. In Proceedings of the 2024 IFIP Networking Conference, 9 pages, 2024. IFIP.
  2. Pratyush Agnihotri, Boris Koldehofe, Paul Stiegele, Roman Heinrich, Carsten Binnig, Manisha Luthra. ZeroTune: Learned Zero-Shot Cost Model for Parallelism Tuning in Stream Processing. In Proceedings of the IEEE 40th International Conference on Data Engineering (ICDE 2024), IEEE, 2024.
  3. Majid Lotfian Delouee, Victoria Degeler, Peter Amthor, and Boris Koldehofe. APP-CEP: Adaptive Pattern-level Privacy Protection in Complex Event Processing Systems. In Proceedings of the 10th International Conference on Information Systems Security and Privacy (ICISSP’24), 12 pages, SCITEPRESS.

HotNets presentation: Towards analog Networking with PCAM

Yesterday (Nov 29), I had the pleasure to present at the ACM Workshop on hot topics in networking (HotNets) how analog components, in particular memristors, can improve energie efficiency and expressiveness of current packet processing architectures. We propose a new programming abstraction named PCAM which accounts in contrast to TCAM memory for the analog nature memristive components.   The work has been conducted in the context of the CogniGron research center. More details, on the paper “The Future is Analog: Energy-Efficient Cognitive Network Functions over Memristor-Based Analog Computations” you can find in the ACM digital library. Special congratulations to Saad Saleh for doing a great job in developing and evaluating PCAM! Finally, thanks to the HotNets organizers for a great event with many exciting propositions for future networking research.

Inaugural Lecture on In-Network Computing by Boris Koldehofe at TU Ilmenau

After being officially welcomed at TU Ilmenau, Boris Koldehofe gave his inaugural lecture at TU Ilmenau on Nov 1st 2023. In his talk named “Accelerating the performance of data driven applications with in-network computing” he discussed how advances in programmable networks can aid to accelerate data-intensive applications in form of in-network computing. Besides discussing technical solutions and research challenges he highlighted also recent research towards energy-efficient in-network computing architectures.

More information:

Boris Koldehofe joins TU Ilmenau

On February 1st, Boris Koldehofe was appointed by the president of TU Ilmenau, Prof. Dr. Kai Uwe Sattler, as Professor of the university. He will be heading the Distributed Systems and Operating Group at the Faculty of Computer Science and the Institute of Applied Computer Science. Boris Koldehofe will continue to collaborate with the University of Groningen and remains a TU Darmstadt fellow as part of the CRC MAKI.

Can memristors reduce the carbon footprint of the Internet?

Saad Saleh presented a novel memory architecture TCAmMCogniGron at the IEEE International Conference on Rebooting Computing, 2022. The proposed architecture TCAmMCogniGron is designed to replace a highly energy intensive memory, named Ternary content addressable memory (TCAM), used in almost all current network switches and routers to store processing rules and forward traffic through the Internet. TCAmMCogniGron enables the general purpose integration of special energy saving materials, named Memristors, which allow to keep the processing rules in form of a state, often represented in form of resistance, and this state is non-volatile. In collaboration with Anouk S. Goossens and Tamalika Banerjee from Zernike Institute for Advanced Materials characteristics of a physical memristor built at the CogniGron research center were studied. The findings demonstrate the high energy efficiency and extreme resiliency of the proposed design. The research concluded that in addition to supporting non-volatile state so-called match and mismatch operations require only about 1–16 femtojoules of energy.

Interested to learn more about the potential of memristive devices to a more energy-friendly Internet, please check out the following research works including a recent survey studying the use of memristive devices for performing energy efficient operations using novel computing architectures in the Internet.

This research is supported by the Groningen Cognitive Systems and Materials Research Center (CogniGron), University of Groningen. 

KUVS Dissertation Award to Manisha Luthra

Congratulations to Manisha Luthra! Manisha was awarded with a dissertation award for her PhD thesis “Network-centric Complex Event Processing” by the German Special Interest group on Communications and Distributed Systems (KuVs) of “Gesellschaft für Informatik” (GI).


Dissertation Ceremony of Manisha in 2021

Manisha Luthra was co-advised by Ralf Steinmetz und Boris Koldehofe in the context of the DFG Collaborative Research Center MAKI. Manisha is now Postdoctoral researcher at the Systems Group of TU Darmstadt. Furthermore, she started recently a new position as senior researcher at the SAIDE Lab of German Research Centre for Artificial Intelligence (DFKI) led by Carsten Binnig.

More information and links:

Open Tenure Track Position as Assistant/Associate Professor in Distributed Systems as part of the Rosalind Franklin Fellow program.

The Rosalind Franklin Fellow program of the University of Groningen has opened several positions as Tenure Track Assistant/Associate Professor for female researchers with three positions at the Bernoulli Institute. One position is dedicated to distributed or network-centric systems research. Candidates with a strong background in this area can apply via the RUG online application portal until Oct 27th 2022.

Energy Efficient Cognitive Computing: Brainspiration 2022, Netherlands

Saad Saleh presented his research on Memristor-based Cognitive and Energy Efficient In-network computing at the Brainspiration 2022 conference, University of Twente, Netherlands. The conference focused on brain-inspired concepts and materials for information processing.

The motivation for brain-inspired computing emerges from the current generation of computers which huge amounts of energy resources and lack cognitive functionality which is critical for many applications like self-driving cars. In this regard, the CogniGron research center at the University of Groningen has developed materials, called memristors, which consume less energy resources and provide cognitive functionality similar to the human brain. Saad presented the use of these cognitive materials for the Internet components and showed various design models and techniques for incorporating cognitive functionality inside the Internet. Preliminary results have shown promising power consumption statistics of these materials for Internet components requiring little (16 uW during operational mode) to no energy consumption (during standby mode).

The speakers and attendees at the conference included renowned scientists and researchers from academia and industry including Beatriz Noheda (CogniGron), Julie Grollier (Thales), John Paul Strachan (Forschungszentrum Jülich), Abu-Sebastian (IBM), Andrea Liu (UPenn), Wilfred Gerard (UT), Wolfram Pernice (Heidelberg University), and researchers from HP labs (USA), Sandia National Labs (USA), AMOLF (NL).

This research is in collaboration with Anouk Goossens and Tamalika Banerjee from Zernike Institute of Advanced Materials, University of Groningen. For more information about this research, contact Saad Saleh or Boris Koldehofe (Adviser).

EuroSys 2023 Shadow PC

Young system researchers, e.g., Ph.D. students and PostDocs, can now apply for the EuroSys 2023 Shadow PC until October 12th.

A Shadow PC is meant to allow young researchers to obtain insight into the review process of major conferences. Typically, the review process of a big conference like EuroSys is rather intransperrant to young researchers. Therefore, it isn’t easy to understand what requires excellent research work to be accepted.

In a shadow PC (shadowing the programm commitee), young researchers actively review the research papers submitted to the conference. In EuroSys, papers submitted to the conference will also be assigned to members of the shadow PC for review with the permission of the authors. In addition, the shadow PC will determine and discuss its own ranking of submitted papers. Although the outcome will and must not impact the decision of the conference program committee, the discussion allows the researchers to obtain in-depth experience in the review process. Moreover, the reviews will also provide, in many cases, additional helpful
feedback to the authors.

Interested in joining? Please, check out the Call for Participitation of EuroSys 2023!

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