TIRAMOLA: Elastic Application Provisioning through a Cloud Management Platform
TIRAMOLA modular architecture
The TIRAMOLA system architecture

 TIRAMOLA is a modular, cloud-enabled framework for monitoring and adaptively resizing NoSQL clusters. It incorporates a decision-making module which allows for optimal cluster resize actions in order to maximize any quantifiable reward function provided together with life-long adaptation to workload or infrastructural changes.
TIRAMOLA is open-sourced and can be downloaded from here: tiramola.googlecode.com

Publications

  • E. Angelou and N. Papailiou and I. Konstantinou and D. Tsoumakos and N. Koziris Automatic Scaling of Selective SPARQL Joins Using the TIRAMOLA System In proceedings of the 4th International Workshop on Semantic Web Information Management (SWIM 2012 - In conjuction with SIGMOD), Scottsdale, Arizona, USA, 20 May 2012,camera ready presentation

H2RDF: Adaptive, Join-Scalable Querying of RDF Data in the Cloud
H2RDF system architecture
 H2RDF is a fully distributed RDF store that combines the MapReduce processing framework with a NoSQL distributed data store. Materializing three index structures over the RDF data in HBase, it can answer SPARQL queries on virtually unlimited number of RDF triples. Moreover, in contrast to existing approaches, it can process complex join queries in a highly scalable fashion, while making adaptive decisions over both the join order and execution, assisted by a query planner; thereby, joins are executed using either single-machine or distributed jobs according to the amount of processing needed. The system is open-sourced and can be downloaded from h2rdf.googlecode.com.

Publications

  • E. Angelou and N. Papailiou and I. Konstantinou and D. Tsoumakos and N. Koziris Automatic Scaling of Selective SPARQL Joins Using the TIRAMOLA System In proceedings of the 4th International Workshop on Semantic Web Information Management (SWIM 2012 - In conjuction with SIGMOD), Scottsdale, Arizona, USA, 20 May 2012,camera ready presentation
  • N. Papailiou and I. Konstantinou and D. Tsoumakos and N. Koziris H2RDF: Adaptive Query Processing on RDF Data in the Cloud In Proceedings of the 21th International Conference on World Wide Web (WWW demo track), Lyon, France, 2012 camera ready