@misc{MoserHaridiShafaatetal.2009, author = {Moser, Monika and Haridi, Seif and Shafaat, Tallat and Sch{\"u}tt, Thorsten and H{\"o}gqvist, Mikael and Reinefeld, Alexander}, title = {Transactional DHT Algorithms}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-11532}, number = {09-34}, year = {2009}, abstract = {We present a framework for transactional data access on data stored in a DHT. It allows to atomically read and write items and to run distributed transactions consisting of a sequence of read and write operations on the items. Items are symmetrically replicated in order to achieve durability of data stored in the SON. To provide availability of items despite the unavailability of some replicas, operations on items are quorum-based. They make progress as long as a majority of replicas can be accessed. Our framework processes transactions optimistically with an atomic commit protocol that is based on Paxos atomic commit. We present algorithms for the whole framework with an event based notation. Additionally we discuss the problem of lookup inconsistencies and its implications on the one-copy serializability property of the transaction processing in our framework.}, language = {en} } @misc{SchintkeReinefeldHaridietal.2009, author = {Schintke, Florian and Reinefeld, Alexander and Haridi, Seif and Sch{\"u}tt, Thorsten}, title = {Enhanced Paxos Commit for Transactions on DHTs}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-11448}, number = {09-28}, year = {2009}, abstract = {Key/value stores which are built on structured overlay networks often lack support for atomic transactions and strong data consistency among replicas. This is unfortunate, because consistency guarantees and transactions would allow a wide range of additional application domains to benefit from the inherent scalability and fault-tolerance of DHTs. The Scalaris key/value store supports strong data consistency and atomic transactions. It uses an enhanced Paxos Commit protocol with only four communication steps rather than six. This improvement was possible by exploiting information from the replica distribution in the DHT. Scalaris enables implementation of more reliable and scalable infrastructure for collaborative Web services that require strong consistency and atomic changes across multiple items.}, language = {en} } @inproceedings{SchintkeReinefeldHaridietal.2010, author = {Schintke, Florian and Reinefeld, Alexander and Haridi, Seif and Sch{\"u}tt, Thorsten}, title = {Enhanced Paxos Commit for Transactions on DHTs}, booktitle = {CCGRID}, publisher = {IEEE}, doi = {10.1109/CCGRID.2010.41}, pages = {448 -- 454}, year = {2010}, language = {en} } @inproceedings{SchuettReinefeldSchintkeetal.2009, author = {Sch{\"u}tt, Thorsten and Reinefeld, Alexander and Schintke, Florian and Hennig, C.}, title = {Self-Adaptation in Large-Scale Systems: A Study on Structured Overlays Across Multiple Datacenters}, booktitle = {Architectures and Languages for Self-Managing Distributed Systems (SelfMan@SASO)}, doi = {10.1109/SASOW.2010.65}, year = {2009}, language = {en} } @inproceedings{SchuettMoserPlantikowetal.2008, author = {Sch{\"u}tt, Thorsten and Moser, Monika and Plantikow, Stefan and Schintke, Florian and Reinefeld, Alexander}, title = {A Transactional Scalable Distributed Data Store}, booktitle = {1st IEEE International Scalable Computing Challenge, co-located with CCGrid'08}, year = {2008}, language = {en} } @inproceedings{ShafaatMoserGhodsietal.2008, author = {Shafaat, Tallat and Moser, Monika and Ghodsi, Ali and Sch{\"u}tt, Thorsten and Haridi, Seif and Reinefeld, Alexander}, title = {Key-Based Consistency and Availability in Structured Overlay Networks}, booktitle = {International ICST Conference on Scalable Information Systems}, year = {2008}, language = {en} } @incollection{ReinefeldSchintkeSchuettetal.2009, author = {Reinefeld, Alexander and Schintke, Florian and Sch{\"u}tt, Thorsten and Haridi, Seif}, title = {A Scalable, Transactional Data Store for Future Internet Services}, booktitle = {Towards the Future Internet - A European Research Perspective}, editor = {Tselentis, G. and Domingue, J. and Galis, A. and Gavras, A. and Hausheer, D. and Krco, S. and Lotz, V. and Zahariadis, T.}, publisher = {IOS Press}, doi = {10.3233/978-1-60750-007-0-148}, pages = {148 -- 159}, year = {2009}, language = {en} } @inproceedings{SchuettReinefeldSchintkeetal.2009, author = {Sch{\"u}tt, Thorsten and Reinefeld, Alexander and Schintke, Florian and Hoffmann, Marie}, title = {Gossip-based Topology Inference for Efficient Overlay Mapping on Data Centers}, booktitle = {Peer-to-Peer Computing}, doi = {10.1109/P2P.2009.5284553}, pages = {147 -- 150}, year = {2009}, language = {en} } @inproceedings{PlantikowReinefeldSchintke2008, author = {Plantikow, Stefan and Reinefeld, Alexander and Schintke, Florian}, title = {Transactions and Concurrency Control for Peer-to-Peer-Wikis: An Evaluation}, booktitle = {Making Grids Work}, editor = {Danelutto, Marco and Fragopoulou, Paraskevi and Getov, Vladimir}, doi = {10.1007/978-0-387-78448-9_27}, pages = {337 -- 349}, year = {2008}, language = {en} } @inproceedings{HoegqvistHaridiKruberetal.2008, author = {H{\"o}gqvist, Mikael and Haridi, Seif and Kruber, Nico and Reinefeld, Alexander and Sch{\"u}tt, Thorsten}, title = {Using Global Information for Load Balancing in DHTs}, booktitle = {Workshop on Decentralized Self Management for Grids, P2P, and User Communities}, year = {2008}, language = {en} } @inproceedings{SchuettSchintkeReinefeld2007, author = {Sch{\"u}tt, Thorsten and Schintke, Florian and Reinefeld, Alexander}, title = {A Structured Overlay for Multi-dimensional Range Queries}, volume = {4641}, booktitle = {Euro-Par Conference}, editor = {Kermarrec, Anne-Marie}, publisher = {Springer}, doi = {10.1007/978-3-540-74466-5_54}, pages = {503 -- 513}, year = {2007}, language = {en} } @misc{ReinefeldSchintkeSchuett2007, author = {Reinefeld, Alexander and Schintke, Florian and Sch{\"u}tt, Thorsten}, title = {Device and method for retrieving / storing electronic data in a system with a plurality of data processing units}, publisher = {United States Patent Application Publication No. US 2007/0165619 A1}, year = {2007}, language = {en} } @inproceedings{PlantikowReinefeldSchintke2007, author = {Plantikow, Stefan and Reinefeld, Alexander and Schintke, Florian}, title = {Distributed Wikis on Structured Overlays}, booktitle = {CoreGrid Workshop on Grid Programming Models, Grid and P2P System Architecture, Grid Systems, Tools and Environments}, year = {2007}, language = {en} } @inproceedings{PlantikowReinefeldSchintke2007, author = {Plantikow, Stefan and Reinefeld, Alexander and Schintke, Florian}, title = {Transactions for Distributed Wikis on Structured Overlays}, volume = {4785}, booktitle = {DSOM}, editor = {Clemm, Alexander and Granville, Lisandro and Stadler, Rolf}, publisher = {Springer}, address = {Silicon Valley, CA, USA}, doi = {10.1007/978-3-540-75694-1_25}, pages = {256 -- 267}, year = {2007}, language = {en} } @misc{ReinefeldSchintkeSchuett2007, author = {Reinefeld, Alexander and Schintke, Florian and Sch{\"u}tt, Thorsten}, title = {Vorrichtung und Verfahren zum Abrufen / Speichern von elektronischen Daten in einem System mit mehreren Datenverarbeitungseinheiten}, publisher = {Europ{\"a}isches Patent EP 1 744 257 A1}, year = {2007}, language = {en} } @misc{ReinefeldSchintkeSchuett2007, author = {Reinefeld, Alexander and Schintke, Florian and Sch{\"u}tt, Thorsten}, title = {Vorrichtung und Verfahren zum Speichern / Abrufen von Objekten mit mehrdimensional adressierten, elektronischen Daten}, publisher = {Europ{\"a}ische Patentanmeldung Nr. 06012030.0 vom 12.06.2006, Patent Nr: 1868114}, year = {2007}, language = {en} } @inproceedings{ShafaatMoserGhodsietal.2008, author = {Shafaat, Tallat and Moser, Monika and Ghodsi, Ali and Sch{\"u}tt, Thorsten and Reinefeld, Alexander}, title = {On Consistency of Data in Structured Overlay Networks}, booktitle = {Coregrid Integration Workshop}, year = {2008}, language = {en} } @article{SchuettSchintkeReinefeld2008, author = {Sch{\"u}tt, Thorsten and Schintke, Florian and Reinefeld, Alexander}, title = {Range Queries on structured overlay networks}, volume = {31}, journal = {Computer Communications}, number = {2}, publisher = {Elsevier}, doi = {10.1016/j.comcom.2007.08.027}, pages = {280 -- 291}, year = {2008}, language = {en} } @inproceedings{SchuettSchintkeReinefeld2008, author = {Sch{\"u}tt, Thorsten and Schintke, Florian and Reinefeld, Alexander}, title = {Scalaris: Reliable Transactional P2P Key/Value}, booktitle = {ERLANG '08: Proceedings of the 7th ACM SIGPLAN workshop on ERLANG}, doi = {10.1145/1411273.1411280}, pages = {41 -- 47}, year = {2008}, language = {en} } @inproceedings{RoyHaridiReinefeldetal.2008, author = {Roy, P. and Haridi, Seif and Reinefeld, Alexander and Stefani, J. B. and Yap, R. and Coupaye, T.}, title = {Self Management for Large-Scale Distributed Systems}, booktitle = {Formal Methods for Components and Objects 2007 (FMCO 2007)}, publisher = {Springer LNCS}, year = {2008}, language = {en} } @inproceedings{SchuettSchintkeReinefeld2006, author = {Sch{\"u}tt, Thorsten and Schintke, Florian and Reinefeld, Alexander}, title = {Structured Overlay without Consistent Hashing: Empirical Results}, booktitle = {Sixth Workshop on Global and Peer-to-Peer Computing (GP2PC'06) at Sixth IEEE International Symposium on Cluster Computing and the Grid (CCGrid 2006), 16-19 May 2006, Singapore}, publisher = {IEEE Computer Society}, doi = {10.1109/CCGRID.2006.175}, pages = {8}, year = {2006}, language = {en} } @article{HoegqvistReinefeld2013, author = {H{\"o}gqvist, Mikael and Reinefeld, Alexander}, title = {RECODE: Reconfigurable, Consistent and Decentralized Data Services}, journal = {IEEE International Conference on Peer-to-Peer Computing (P2P'13)}, publisher = {IEEE}, doi = {10.1109/P2P.2013.6688705}, pages = {1 -- 10}, year = {2013}, language = {en} } @misc{ReinefeldSchintkeSchuett2007, author = {Reinefeld, Alexander and Schintke, Florian and Sch{\"u}tt, Thorsten}, title = {P2P Routing of Range Queries in Skewed Multidimensional Data Sets}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-9671}, number = {07-23}, year = {2007}, abstract = {We present a middleware to store multidimensional data sets on Internet-scale distributed systems and to efficiently perform range queries on them. Our structured overlay network \emph{SONAR (Structured Overlay Network with Arbitrary Range queries)} puts keys which are adjacent in the key space on logically adjacent nodes in the overlay and is thereby able to process multidimensional range queries with a single logarithmic data lookup and local forwarding. The specified ranges may have arbitrary shapes like rectangles, circles, spheres or polygons. Empirical results demonstrate the routing performance of SONAR on several data sets, ranging from real-world data to artificially constructed worst case distributions. We study the quality of SONAR's routing information which is based on local knowledge only and measure the indegree of the overlay nodes to find potential hot spots in the routing process. We show that SONAR's routing table is self-adjusting, even under extreme situations, keeping always a maximum of \$\lceil \log N \rceil\$ routing entries.}, language = {en} }