Supervision : Marc SHAPIRO
Co-supervision : MONNET Sébastien

Gargamel: boosting DBMS performance by parallelising write transactions

Databases often scale poorly in distributed configurations, due to the cost of concurrency control and to resource contention. The alternative of centralizing writes works well only for read-intensive workloads, whereas weakening transactional properties is problematic for application developers. Our solution spreads non-conflicting update transactions to different replicas, but still provides strong transactional guarantees. In effect, Gargamel partitions the database dynamically according to the update workload. Each database replica runs sequentially, at full bandwidth; mutual synchronisation between replicas remains minimal. Our prototype show that Gargamel improves both response time and load by an order of magnitude when contention is high (highly loaded system with bounded resources), and that otherwise slow-down is negligible.

Phd defence : 09/15/2014

Jury members :

M. PIERRE Guillaume [Rapporteur]
M. VALDURIEZ Patrick [Rapporteur]
M. SHAPIRO Marc , Directeur de thèse
M. FEKETE Alan Univesity of Sidney
Mme. DOUCET Anne,LIP6/UPMC
M. MONNET Sébastien LIP6/UPMC

2012-2014 Publications

• 2014
  • P. Cincilla : “Gargamel: boosting DBMS performance by parallelising write transactions”, thesis, phd defence 09/15/2014, supervision Shapiro, Marc, co-supervision : Monnet, Sébastien (2014)
  • P. Cincilla, S. Monnet, M. Shapiro : “Multi-site Gargamel: Optimistic synchronization for reliable geo-replicated databases”, International Workshop on Middleware for Dependable Systems and Networks, Bordeaux, France (2014)
• 2012
  • P. Cincilla, S. Monnet, M. Shapiro : “Gargamel: boosting DBMS performance by parallelising write transactions”, ICPADS 2012 - IEEE 18^th International Conference on Parallel and Distributed Systems, Singapour, Singapore, pp. 572-579, (IEEE Computer Society) (2012)
  • F. Maia, R. Araújo, L. Muniz, R. Zirtany, L. Coutinho, S. Vale, F. Silva, P. Cincilla, I. Chabbouh, S. Monnet, L. Arantes, M. Shapiro : “A Grid Based Distributed Cooperative Environment for Health Care Research”, FHIES 2012 - Second International Symposium Foundations of Health Information Engineering and Systems, vol. 7789, Lecture Notes in Computer Science, Paris, France, pp. 142-150, (Springer) (2012)