I am a researcher in Computer Science; my research topic is distributed
systems (i.e., interconnected computers working together).
My two current projects are:
- Understanding replication and
Replication is an essential feature of a distributed system, but
updates cause the issue of consistency between replicas.
Strong consistency is easy to understand but expensive (and
impossible if there are failures); weaker models are complex.
Rather than pre-defined consistency models, we propose a “Just-Right
Consistency” approach, tailoring the consistency protocol to
specific application requirements, and using static verification to
ensure that the application remains correct.
- Concurrent programming.
Programming concurrent programs with shared memory is incredibly
bug-prone, yet (with multi-core processors) increasingly relevant.
Fine-grain concurrency is especially challenging.
I am particularly interested in garbage collection for managed
runtime environments on large-scale many-core computers.
This is related to my previous work on distributed garbage collection.
I work for Inria, the French National Institute for
Computer Science and Control Science.
I am part of Delys, a joint group
between Inria and LIP6 (the Computer
Science laboratory of Sorbonne Université,
previously UPMC, previously Paris-6) in Paris.
I previously led the Cambridge
Distributed Systems Group (Camdis)
at Microsoft Research
Cambridge (MSRC), from October 1998 to March 2005.
For several years before that I was the leader of Inria's SOR (Systèmes d'objets
répartis, Distributed Object Systems)
I am a member of the Program Committee of EuroSys 2019 and PODC 2019.
I served from 2012 to 2018 on the "Informatics and Computer Science"
panel of the European Research Council
I am VP for Research of Société
Informatique de France, the French learned society in Informatics.
I am past member of the ACM Europe
I am the past chair of EuroSys, the European professional society
in Computer Systems, which I was instrumental in creating.
(EuroSys is is the European chapter of SIGOPS.)
Marc Shapiro is a
Distinguished Research Scholar (DR0) in the Delys
group of Sorbonne-Université-LIP6 and Inria.
His research topics concern distributed computer systems, data
replication and consistency algorithms, and multicore algorithms. He
leads the SyncFree European
project for highly-available cloud computing and storage, developing the
He is the co-inventor of Conflict-free
Replicated Data Types (CRDTs) designed to reconcile availability and
He invented the proxy concept,
which is now universal on the Internet.
Dr Shapiro's career started with a PhD in Toulouse (U. Paul Sabatier and
LAAS), followed by a post-doc at MIT, research positions at CMIRH and Inria, and a
sabbatical at Cornell.
He is an author of 100
international publications, some in the most prestigious venues, 18
recognised software systems, and five patents.
He led the Cambridge Distributed Systems group at Microsoft
Research Cambridge (UK) for six years.
Dr. Shapiro, a Senior Member
of the ACM, is known for his dedication to
organising the Informatics community and making its voice heard in
He has been a member of several Program Commitees in operating systems,
distributed systems, persistent systems, and garbage collection.
Recent examples include:
Ongoing research grants and collaborative projects:
(ANR stands for
Agence Nationale de la Recherche, the research funding agency of
the French government.)
If you are interested in a PhD, send me a note.
You will need to demonstrate a strong academic record, real scientific
curiosity to explore the leading edge of technology and algorithms, and interest in research topics such as
distributed systems, distributed algorithms, replication and consistency,
databases, concurrent programming, etc.
CIFRE (industrial PhD grant) with Scality, on "CRDTs for large-scale storage,"
awarded to Tao Thanh
- The SyncFree EU project
(FP7 Strep) 2013–2016 aims to develop technologies for
highly-scalable geo-replicated computation and storage.
Building upon CRDTs, its academic
contributions include the planet-scale database AntidoteDB,
Consistency approach to tailoring consistency to application
requirements, the distributed programming language LASP,
and the framework for in-browser data sharing Legion.
Industrial outcomes include Basho's BigSet
technology, and ESL's WombatOAM
tool for system operations, administration and management.
The Euro-TM EU COST action on
"Transactional Memories: Foundations, Algorithms, Tools, and
- The ConcoRDanT ANR
project (2010—2013) aims to study commutative replicated data types,
a principled approach to eventual consistency.
- The Streams ANR project
(2010—2014) studies peer-to-peer, real-time collaboration.
- The Prose
ANR project (2009—2012) studies the sharing of
mutable content (e.g., a shared wiki) over opportunistic communication.
- PhD student Marek Zawirski received a Google
European Doctoral Fellowship towards his PhD on “Theory and
practice of shared data types for cloud computing”.
management of memory and storage for CRDTs,
starting October 2018.
Funded by LightKone and RainbowFS.
Topic: Just-Right Consistency for massive geo-replicated storage,
since April 2018.
Funded by LightKone and RainbowFS.
Topic: Étude des critères de distribution et de l’usage d’une base de
données distribuée pour un OS Telco.
Co-advised with Sofiane Imadali and
Frédéric Martelli, Orange Labs (since Sept 2017).
CIFRE industrial PhD.
Ilyas Toumlilt (since Sept. 2017).
Topic: Bridging the CAP gap, all the way to the edge.
Funded by LightKone and RainbowFS.
Francis Laniel (since Sept. 2017).
Topic: Leveraging non-volatile memory for energy savings.
Funded by Sorbonne-Université.
Topic: Scalable indexing for large-scale distributed storage
co-advised with Vianney Rancurel, Scality (since Sept. 2016).
CIFRE industrial PhD.
Alejandro Z. Tomsic (defended April 2018)
Topic: Exploring the design space of highly-available distributed transactions.
Prize for Best French PhD in systems and networking 2019,
awarded by ASF and RSD.
Tao Thanh Vinh,
co-advised with Vianney Rancurel, defended Dec. 2017.
Ensuring Availability and Managing Consistency in
Geo-Replicated File Systems.
Ascent Robotics, Tokyo.
Najafzadeh (April 2016).
Thesis: The Analysis and Co-design of weakly-consistent
Post-Doc at Purdue University.
Lokesh Gidra, co-advised with
Gaël Thomas and Julien Sopena.
Thesis: Garbage Collector for memory intensive applications on NUMA
architectures, September 2015.
Research Engineer, Google, San Jose, CA, USA.
Thesis: Dependable Eventual Consistency with Replicated Data Types,
Software Engineer at Google, Zürich, Switzerland.
co-advised with Pierre
Thesis: Ensuring Consistency in Partially Replicated Data Stores, 2014.
Senior Software Engineer at Uber, Silicon Valley,
Pierpaolo Cincilla, co-advised with
Thesis: Gargamel : accroître les performances des DBMS en parallélisant
les transactions en écriture, 2014.
Quality engineer connected vehicles and mobility services at
Thesis: Efficient Protocols for Generalized Consensus and Partial
Assistant Professor at Télécom Paris-Sud.
Stratégies de gestion mémoire dans les mémoires d'objets
persistantes automatiques partitionnées, 2002.
Fabrice le Fessant,
co-advised with Jean-Jacques Lévy.
“JoCaml : conception et implémentation d'un langage à
agents mobiles”, 2001.
Researcher at Inria Paris.
“Gestion mémoire dans PERDIS, un environnement réparti
persistant à grande échelle”, 2000.
Head of R&D Department, Senior Software Architect at ACA.
“Objets distribués adaptables pour environnements
Technical Product Consultant at TOPdesk and free-lance photographer.
Georges Brun-Cottan, 1998.
“Cohérence de données repliquées partagées par un groupe de
processus coopérant à distance”.
Software Engineer at Dell EMC.
“Hobbes : un modèle de liaison de références
Standardisation Manager at Nokia.
“Larchant: Persistence by Reachability in Distributed
Shared Memory through Garbage Collection”, 1996.
Senior researcher at INESC, and Associate Professor at IST Lisbon.
“Adaptation des systèmes de stockage aux besoins des
utilisateurs : l'approche micro-systèmes de stockage et sa
mise en œuvre dans BOSS”, 1995.
Self-employed web developer and translator.
“Ramasse-miettes réparti et gestion de références dans le
système à objets SOUL”, 1994.
Program Manager at Kapsch Carrier Com.
co-advised with Ira Pohl.
“Type-Specific Storage Management”, 1993.
Sr Director Software Systems Engineering at Broadcom.
“Kitlog : un service de journalisation générique”,
Technical director for
standardisation at Alcatel-Lucent France. Deceased, 2017.
“Outils pour la programmation d'objets fragmentés”,
R&D Program Leader at Orange Labs.
“Gestion d'objets et migration dans les systèmes
“Protocoles de communication et programmation par objets : l'exemple de SOS”, 1989. Chargé de
Recherche at Inria.
- Faux amis : common French-English mis-translations or
errors. PDF, Numbers.
- Housing in Paris for visiting researchers, students and interns.
- Links about myself:
- Systems research in Europe:
- BibTeX files:
My place of work and team:
My main affiliation is Inria:
- My hikes
Art: Nat Mayer Shapiro, my
Exposes at Galerie
Saphir in Paris.
- Climbing (in Fontainebleau or cliffs),
ski-mountaineering (AKA randonnée ski),
cross-country skiing, nordic skiing,
bicycling, mountain bike: see
- Escalade (escalade Fontainebleau, escalade falaise, escalade mur),
ski de montagne (dit aussi ski de randonnée, ski de rando, ski alpinisme,
ski de raid, ou ski de printemps),
ski de fond (ski nordique, raquettes, randonnée en raquettes),
randonnée (randonnée pedestre, marche sportive),
vélo (cyclotourisme, randonnée en vélo),
VTT (vélo tous terrains, randonnée VTT, raid VTT) : voir
Laboratoire LIP6, Sorbonne-Université.
|Boîte Courrier 169|
4, place Jussieu
|75252 Paris Cedex 05|
|Tel.: +33 1 4427 7093 |
|Home page: http://lip6.fr/Marc.Shapiro/.|
|E-mail: <MARC dot SHAPIRO atsign ACM dot ORG>
(plain-text please; attachments in plain text or PDF only).
(Refer to 3D perspective view of campus, below.)
Immediately after entering campus, turn left towards door marked
On Floor 2, leaving the street to your right, take door marked "26-00".
My office is 211, on the left-hand side.
If any of the doors is locked, dial 7-7093 from the phone at 2nd
floor entrance, or call +33 1 4427 7093 from your mobile phone.
Last modified: Tue Dec 1 11:52:00 CET 2015