Calls and Events

• INFORUM - Simpósio de Informática
• 1st European Workshop on Dependable Cloud Computing (with EDCC)
• 27th ACM SAC Dependable and Adaptive Distributed Systems Track

Research

Data Management: While working on project GORDA, we've been evaluating database replication protocols in realistic settings and workloads [SPS+05, CSS+05] and rethinking their interfaces to database servers [CCP+07]. The resulting insight has allowed us to introduce efficient protocols for consistent replication in clusters [CPO08], wide-area networks [GSC+06], and shared-disk clusters [SP09b]. Currently, in project CumuloNimbo, we're combining the advantages of SQL with the scalability and performance of NoSQL databases.

Group Communication: We've been addressing multiple aspects of scale in view synchronous protocols: stable high throughput with semantic reliability [PRO03], large number of participants with mutable consensus [PO04, MMPO11], and optimistic total order with statistical estimation in WANs [SPMO01]. We've also introduced jGCS, a common programming abstraction for multiple toolkits [CPR06]. More recently, in project P-SON, we focused on epidemic multicast protocols and in combining structured with random overlays for efficiency and reliability [CPOR07, LPR07a], having built the NeEM and Seeds prototypes. Currently, we're using gossip based protocols for cloud storage in Stratus.

Tools: As our research in large scale communication and data management demands experiments that reproduce the conditions of real large scale and fault-prone systems, we have been "sharpening our axe" with the open source Minha plaform [CBCP11].

Teaching

• Distributed Systems and Application Engineering in the Master Course in Informatics
• Distributed Computing in the MAP-i Doctoral Program in Computer Science

More...

All publications, projects, past events, and software. You can reach me at: Departamento de Informática, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal; phone: +351 253 604 449; fax: +351 253 604 471; and preferably by email: jop at di.uminho.pt.