Konstantinos (Kostas) Kanellis



I am a Ph.D. student in the Computer Sciences Department at University of Wisconsin-Madison, working with Shivaram Venkataraman, and also collaborate with Microsoft Gray Systems Lab.

My research interests mostly lie in the area of computer systems, with a focus at the intersection of data systems and machine learning. My latest research aims at improving existing ML-based database tuning tools.

Before moving to Madison, I received a M.Eng. in Electrical and Computer Engineering from University of Thessaly, Greece. In my undergraduate thesis, I worked with Christos D. Antonopoulos on characterizing programs behavior using low-level metrics that can be found on modern CPUs.

In the past, I have also interned at Microsoft Research, Redmond (2021), IBM Research - Zurich (2019), and CERN openlab (2017).


Sep '22
Attended VLDB 2022 in the beautiful city of Sydney, and presented our LlamaTune work! 🇦🇺🦙
Jun '22
LlamaTune accepted at VLDB 2022! 🔥
Mar '22
Preprint of our new work for sample-efficient DBMS configuration tuning is now available!
Dec '21
Passed my Ph.D. Qualifying Exams! 😄
May '21
Excited to start my research internship at MSR Redmond in the Data Systems group!
Jan '21
Started as affiliate research assistant at Microsoft Gray Systems Lab!
Jul '20
Virtually presented our work on reducing the tuning time of storage systems at HotStorage ‘20!


  1. VLDB’22
    LlamaTune: Sample-Efficient DBMS Configuration Tuning
    Konstantinos Kanellis, Cong Ding, Brian Kroth, Andreas Müller, Carlo Curino, Shivaram Venkataraman
    Proceedings of the VLDB Endowment, Vol. 15, Jul 2022
  2. HotStorage’20
    Too Many Knobs to Tune? Towards Faster Database Tuning by Pre-Selecting Important Knobs
    Konstantinos Kanellis, Ramnatthan Alagappan, Shivaram Venkataraman
    12th USENIX Conference on Hot Topics in Storage and File Systems, Jul 2020
  3. FPL 2017
    A programming model and runtime system for approximation-aware heterogeneous computing
    Ioannis Parnassos, Nikolaos Bellas, Nikolaos Katsaros, Nikolaos Patsiatzis, Athanasios Gkaras,  Konstantinos Kanellis, Christos D. Antonopoulos, Michalis Spyrou, Manolis Maroudas
    27th International Conference on Field Programmable Logic and Applications (FPL), Sep 2017