Leader of the group Database Architectures: Stefan Manegold.

We, the Database Architectures (DA) research group of CWI, are well known as a top data systems research group, active in the broad area of data (management) systems and infrastructure for supporting data science. Our research group has a strong international reputation in academia and industry for pioneering column store technology, fast compression methods, vectorized query execution, on-line query-driven indexing (cracking), adaptive caching, and integration of statistical languages and analysis in database management systems.

We develop, distribute and maintain the MonetDB open-source system, and we have spawned multiple spin-off companies, including Data Distilleries, VectorWise and MonetDB Solutions. Our team also operates a self-built cluster, SciLens, that – unlike many other computer clusters – is bandwidth-optimized and thus better suited as a data-science infrastructure. We pride ourselves on revealing the real problems in our discipline and coming up with revolutionary solutions that are frequently ahead of their time.





No vacancies currently.


Current events

PhD defense Pedro Holanda

  • 2021-09-21T10:00:00+02:00
  • 2021-09-21T11:00:00+02:00
September 21 Tuesday

Start: 2021-09-21 10:00:00+02:00 End: 2021-09-21 11:00:00+02:00

Leiden University

Everyone is invited to attend the public PhD defense of Pedro Holanda's PhD thesis Progressive Indexes.

The defence will take place at Leiden University on 21 September at 10.00.

Supervisor: Prof. dr. Stefan Manegold (CWI/UL)
Co-Supervisors: Dr. Hannes Mühleisen (CWI/UvA)
Prof. dr. Peter Boncz (CWI/VU)


Associated Members



Current projects with external funding

  • RelationalAI-CWI Research Agreement ()
  • Actian Research Grant II (ACTIAN II)
  • Cross-Industry Predictive Maintenance Optimization Platform (CIMPLO)
  • Databricks CWI Research Agreement (Databricks)
  • Lokale Digitale Competentie centra (DCC) (DCC-NWO-I)
  • Facebook Research Grant (Facebook)
  • Research agreeement CWI - Databricks - vervolg contract (None)
  • Process mining for multi-objective online control (PROMIMOOC)
  • RelationalAI-CWI Research Grant Agreement (RelationalAI)
  • Structure-aware Querying & Information Retrieval on Evolving Large Graphs (SQIREL-GRAPHS)
  • Ursa-CWI Research Grant (Ursa)

Related partners

  • Actian Corporation
  • BMW Munich
  • Databricks
  • LIACS Institute
  • MonetDB B.V.
  • Neo Technology AB
  • OBI4wan B.V.
  • RelationalAI
  • Spinque
  • Tata Steel
  • WizeNoze B.V.
  • Facebook
  • Ursa Computing Inc.