--- _id: '626' abstract: - lang: eng text: The design of ecient search structures for peer-to-peer systems has attracted a lot of attention in recent years. In this announcement we address the problem of nding the predecessor in a key set and present an ecient data structure called hashed Predecessor Patricia trie. Our hashed Predecessor Patricia trie supports PredecessorSearch(x) and Insert(x) and Delete(x) in O(log log u) hash table accesses when u is the size of the universe of the keys. That is the costs only depend on u and not the size of the data structure. One feature of our approach is that it only uses the lookup interface of the hash table and therefore hash table accesses may be realized by any distributed hash table (DHT). author: - first_name: Sebastian full_name: Kniesburges, Sebastian last_name: Kniesburges - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Kniesburges S, Scheideler C. Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems. In: Proceedings of the 26th International Symposium on Distributed Computing (DISC). LNCS. ; 2012:435-436. doi:10.1007/978-3-642-33651-5_45' apa: 'Kniesburges, S., & Scheideler, C. (2012). Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems. In Proceedings of the 26th International Symposium on Distributed Computing (DISC) (pp. 435–436). https://doi.org/10.1007/978-3-642-33651-5_45' bibtex: '@inproceedings{Kniesburges_Scheideler_2012, series={LNCS}, title={Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems}, DOI={10.1007/978-3-642-33651-5_45}, booktitle={Proceedings of the 26th International Symposium on Distributed Computing (DISC)}, author={Kniesburges, Sebastian and Scheideler, Christian}, year={2012}, pages={435–436}, collection={LNCS} }' chicago: 'Kniesburges, Sebastian, and Christian Scheideler. “Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems.” In Proceedings of the 26th International Symposium on Distributed Computing (DISC), 435–36. LNCS, 2012. https://doi.org/10.1007/978-3-642-33651-5_45.' ieee: 'S. Kniesburges and C. Scheideler, “Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems,” in Proceedings of the 26th International Symposium on Distributed Computing (DISC), 2012, pp. 435–436.' mla: 'Kniesburges, Sebastian, and Christian Scheideler. “Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems.” Proceedings of the 26th International Symposium on Distributed Computing (DISC), 2012, pp. 435–36, doi:10.1007/978-3-642-33651-5_45.' short: 'S. Kniesburges, C. Scheideler, in: Proceedings of the 26th International Symposium on Distributed Computing (DISC), 2012, pp. 435–436.' date_created: 2017-10-17T12:42:54Z date_updated: 2022-01-06T07:02:59Z ddc: - '040' department: - _id: '79' doi: 10.1007/978-3-642-33651-5_45 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T06:42:40Z date_updated: 2018-03-15T06:42:40Z file_id: '1239' file_name: 626-Predecessor-Kniesburges_Scheideler.pdf file_size: 184095 relation: main_file success: 1 file_date_updated: 2018-03-15T06:42:40Z has_accepted_license: '1' page: 435-436 project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publication: Proceedings of the 26th International Symposium on Distributed Computing (DISC) series_title: LNCS status: public title: 'Brief Announcement: Hashed Predecessor Patricia Trie - A Data Structure for Efficient Predecessor Queries in Peer-to-Peer Systems' type: conference user_id: '15504' year: '2012' ... --- _id: '632' abstract: - lang: eng text: 'Given an integer h, a graph G = (V;E) with arbitrary positive edge capacities and k pairs of vertices (s1; t1); (s2; t2); : : : ; (sk; tk), called terminals, an h-route cut is a set F µ E of edges such that after the removal of the edges in F no pair si ¡ ti is connected by h edge-disjoint paths (i.e., the connectivity of every si ¡ ti pair is at most h ¡ 1 in (V;E n F)). The h-route cut is a natural generalization of the classical cut problem for multicommodity °ows (take h = 1). The main result of this paper is an O(h722h log2 k)-approximation algorithm for the minimum h-route cut problem in the case that s1 = s2 = ¢ ¢ ¢ = sk, called the single source case. As a corollary of it we obtain an approximate duality theorem for multiroute multicom-modity °ows and cuts with a single source. This partially answers an open question posted in several previous papers dealing with cuts for multicommodity multiroute problems.' author: - first_name: Petr full_name: Kolman, Petr last_name: Kolman - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Kolman P, Scheideler C. Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case. In: Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA). ; 2012:800-810. doi:10.1137/1.9781611973099.64' apa: 'Kolman, P., & Scheideler, C. (2012). Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case. In Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA) (pp. 800–810). https://doi.org/10.1137/1.9781611973099.64' bibtex: '@inproceedings{Kolman_Scheideler_2012, title={Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case}, DOI={10.1137/1.9781611973099.64}, booktitle={Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA)}, author={Kolman, Petr and Scheideler, Christian}, year={2012}, pages={800–810} }' chicago: 'Kolman, Petr, and Christian Scheideler. “Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case.” In Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA), 800–810, 2012. https://doi.org/10.1137/1.9781611973099.64.' ieee: 'P. Kolman and C. Scheideler, “Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case,” in Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA), 2012, pp. 800–810.' mla: 'Kolman, Petr, and Christian Scheideler. “Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case.” Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA), 2012, pp. 800–10, doi:10.1137/1.9781611973099.64.' short: 'P. Kolman, C. Scheideler, in: Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA), 2012, pp. 800–810.' date_created: 2017-10-17T12:42:55Z date_updated: 2022-01-06T07:03:01Z ddc: - '040' department: - _id: '79' doi: 10.1137/1.9781611973099.64 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T06:35:58Z date_updated: 2018-03-15T06:35:58Z file_id: '1234' file_name: 632-SODA2012-Scheideler_01.pdf file_size: 220213 relation: main_file success: 1 file_date_updated: 2018-03-15T06:35:58Z has_accepted_license: '1' page: 800-810 project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publication: Proceedings of the 23th ACM SIAM Symposium on Discrete Algorithms (SODA) status: public title: 'Approximate Duality of Multicommodity Multiroute Flows and Cuts: Single Source Case' type: conference user_id: '15504' year: '2012' ... --- _id: '640' abstract: - lang: eng text: Small-world networks have received significant attention because of their potential as models for the interaction networks of complex systems. Specifically, neither random networks nor regular lattices seem to be an adequate framework within which to study real-world complex systems such as chemical-reaction networks, neural networks, food webs, social networks, scientific-collaboration networks, and computer networks. Small-world networks provide some desired properties like an expected polylogarithmic distance between two processes in the network, which allows routing in polylogarithmic hops by simple greedy routing, and robustness against attacks or failures. By these properties, small-world networks are possible solutions for large overlay networks comparable to structured overlay networks like CAN, Pastry, Chord, which also provide polylogarithmic routing, but due to their uniform structure, structured overlay networks are more vulnerable to attacks or failures. In this paper we bring together a randomized process converging to a small-world network and a self-stabilization process so that a small-world network is formed out of any weakly connected initial state. To the best of our knowledge this is the first distributed self-stabilization process for building a small-world network. author: - first_name: Sebastian full_name: Kniesburges, Sebastian last_name: Kniesburges - first_name: Andreas full_name: Koutsopoulos, Andreas last_name: Koutsopoulos - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Kniesburges S, Koutsopoulos A, Scheideler C. A Self-Stabilization Process for Small-World Networks. In: Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS). ; 2012:1261--1271. doi:10.1109/IPDPS.2012.115' apa: Kniesburges, S., Koutsopoulos, A., & Scheideler, C. (2012). A Self-Stabilization Process for Small-World Networks. In Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS) (pp. 1261--1271). https://doi.org/10.1109/IPDPS.2012.115 bibtex: '@inproceedings{Kniesburges_Koutsopoulos_Scheideler_2012, title={A Self-Stabilization Process for Small-World Networks}, DOI={10.1109/IPDPS.2012.115}, booktitle={Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, author={Kniesburges, Sebastian and Koutsopoulos, Andreas and Scheideler, Christian}, year={2012}, pages={1261--1271} }' chicago: Kniesburges, Sebastian, Andreas Koutsopoulos, and Christian Scheideler. “A Self-Stabilization Process for Small-World Networks.” In Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 1261--1271, 2012. https://doi.org/10.1109/IPDPS.2012.115. ieee: S. Kniesburges, A. Koutsopoulos, and C. Scheideler, “A Self-Stabilization Process for Small-World Networks,” in Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2012, pp. 1261--1271. mla: Kniesburges, Sebastian, et al. “A Self-Stabilization Process for Small-World Networks.” Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2012, pp. 1261--1271, doi:10.1109/IPDPS.2012.115. short: 'S. Kniesburges, A. Koutsopoulos, C. Scheideler, in: Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2012, pp. 1261--1271.' date_created: 2017-10-17T12:42:56Z date_updated: 2022-01-06T07:03:04Z ddc: - '040' department: - _id: '79' doi: 10.1109/IPDPS.2012.115 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-14T14:13:13Z date_updated: 2018-03-14T14:13:13Z file_id: '1230' file_name: 640-IPDPS2012-Kniesb-Kouts-Scheideler.pdf file_size: 210176 relation: main_file success: 1 file_date_updated: 2018-03-14T14:13:13Z has_accepted_license: '1' page: 1261--1271 project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publication: Proceedings of the 26th IEEE International Parallel and Distributed Processing Symposium (IPDPS) status: public title: A Self-Stabilization Process for Small-World Networks type: conference user_id: '15504' year: '2012' ... --- _id: '1868' author: - first_name: Andr{\'{e}}a full_name: W. Richa, Andr{\'{e}}a last_name: W. Richa - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Stefan full_name: Schmid, Stefan last_name: Schmid - first_name: Jin full_name: Zhang, Jin last_name: Zhang citation: ama: W. Richa A, Scheideler C, Schmid S, Zhang J. Competitive throughput in multi-hop wireless networks despite adaptive jamming. Distributed Computing. 2013;(3):159--171. doi:10.1007/s00446-012-0180-x apa: W. Richa, A., Scheideler, C., Schmid, S., & Zhang, J. (2013). Competitive throughput in multi-hop wireless networks despite adaptive jamming. Distributed Computing, (3), 159--171. https://doi.org/10.1007/s00446-012-0180-x bibtex: '@article{W. Richa_Scheideler_Schmid_Zhang_2013, title={Competitive throughput in multi-hop wireless networks despite adaptive jamming}, DOI={10.1007/s00446-012-0180-x}, number={3}, journal={Distributed Computing}, author={W. Richa, Andr{\’{e}}a and Scheideler, Christian and Schmid, Stefan and Zhang, Jin}, year={2013}, pages={159--171} }' chicago: 'W. Richa, Andr{\’{e}}a, Christian Scheideler, Stefan Schmid, and Jin Zhang. “Competitive Throughput in Multi-Hop Wireless Networks despite Adaptive Jamming.” Distributed Computing, no. 3 (2013): 159--171. https://doi.org/10.1007/s00446-012-0180-x.' ieee: A. W. Richa, C. Scheideler, S. Schmid, and J. Zhang, “Competitive throughput in multi-hop wireless networks despite adaptive jamming,” Distributed Computing, no. 3, pp. 159--171, 2013. mla: W. Richa, Andr{\’{e}}a, et al. “Competitive Throughput in Multi-Hop Wireless Networks despite Adaptive Jamming.” Distributed Computing, no. 3, 2013, pp. 159--171, doi:10.1007/s00446-012-0180-x. short: A. W. Richa, C. Scheideler, S. Schmid, J. Zhang, Distributed Computing (2013) 159--171. date_created: 2018-03-28T06:31:02Z date_updated: 2022-01-06T06:53:50Z department: - _id: '79' doi: 10.1007/s00446-012-0180-x issue: '3' page: 159--171 publication: Distributed Computing status: public title: Competitive throughput in multi-hop wireless networks despite adaptive jamming type: journal_article user_id: '15504' year: '2013' ... --- _id: '1870' author: - first_name: Rizal full_name: Mohd Nor, Rizal last_name: Mohd Nor - first_name: Mikhail full_name: Nesterenko, Mikhail last_name: Nesterenko - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: Mohd Nor R, Nesterenko M, Scheideler C. Corona:  A stabilizing deterministic message-passing skip list. Theor Comput Sci. 2013:119--129. doi:10.1016/j.tcs.2012.08.029 apa: Mohd Nor, R., Nesterenko, M., & Scheideler, C. (2013). Corona:  A stabilizing deterministic message-passing skip list. Theor. Comput. Sci., 119--129. https://doi.org/10.1016/j.tcs.2012.08.029 bibtex: '@article{Mohd Nor_Nesterenko_Scheideler_2013, title={Corona:  A stabilizing deterministic message-passing skip list}, DOI={10.1016/j.tcs.2012.08.029}, journal={Theor. Comput. Sci.}, author={Mohd Nor, Rizal and Nesterenko, Mikhail and Scheideler, Christian}, year={2013}, pages={119--129} }' chicago: Mohd Nor, Rizal, Mikhail Nesterenko, and Christian Scheideler. “Corona:  A Stabilizing Deterministic Message-Passing Skip List.” Theor. Comput. Sci., 2013, 119--129. https://doi.org/10.1016/j.tcs.2012.08.029. ieee: R. Mohd Nor, M. Nesterenko, and C. Scheideler, “Corona:  A stabilizing deterministic message-passing skip list,” Theor. Comput. Sci., pp. 119--129, 2013. mla: Mohd Nor, Rizal, et al. “Corona:  A Stabilizing Deterministic Message-Passing Skip List.” Theor. Comput. Sci., 2013, pp. 119--129, doi:10.1016/j.tcs.2012.08.029. short: R. Mohd Nor, M. Nesterenko, C. Scheideler, Theor. Comput. Sci. (2013) 119--129. date_created: 2018-03-28T06:32:26Z date_updated: 2022-01-06T06:53:51Z department: - _id: '79' doi: 10.1016/j.tcs.2012.08.029 page: 119--129 publication: Theor. Comput. Sci. status: public title: 'Corona: A stabilizing deterministic message-passing skip list' type: journal_article user_id: '15504' year: '2013' ... --- _id: '1871' author: - first_name: Andrea full_name: W. Richa, Andrea last_name: W. Richa - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Stefan full_name: Schmid, Stefan last_name: Schmid - first_name: Jin full_name: Zhang, Jin last_name: Zhang citation: ama: W. Richa A, Scheideler C, Schmid S, Zhang J. An Efficient and Fair MAC Protocol Robust to Reactive Interference. IEEE/ACM Trans Netw. 2013;(3):760--771. doi:10.1109/TNET.2012.2210241 apa: W. Richa, A., Scheideler, C., Schmid, S., & Zhang, J. (2013). An Efficient and Fair MAC Protocol Robust to Reactive Interference. IEEE/ACM Trans. Netw., (3), 760--771. https://doi.org/10.1109/TNET.2012.2210241 bibtex: '@article{W. Richa_Scheideler_Schmid_Zhang_2013, title={An Efficient and Fair MAC Protocol Robust to Reactive Interference}, DOI={10.1109/TNET.2012.2210241}, number={3}, journal={IEEE/ACM Trans. Netw.}, author={W. Richa, Andrea and Scheideler, Christian and Schmid, Stefan and Zhang, Jin}, year={2013}, pages={760--771} }' chicago: 'W. Richa, Andrea, Christian Scheideler, Stefan Schmid, and Jin Zhang. “An Efficient and Fair MAC Protocol Robust to Reactive Interference.” IEEE/ACM Trans. Netw., no. 3 (2013): 760--771. https://doi.org/10.1109/TNET.2012.2210241.' ieee: A. W. Richa, C. Scheideler, S. Schmid, and J. Zhang, “An Efficient and Fair MAC Protocol Robust to Reactive Interference,” IEEE/ACM Trans. Netw., no. 3, pp. 760--771, 2013. mla: W. Richa, Andrea, et al. “An Efficient and Fair MAC Protocol Robust to Reactive Interference.” IEEE/ACM Trans. Netw., no. 3, 2013, pp. 760--771, doi:10.1109/TNET.2012.2210241. short: A. W. Richa, C. Scheideler, S. Schmid, J. Zhang, IEEE/ACM Trans. Netw. (2013) 760--771. date_created: 2018-03-28T06:32:59Z date_updated: 2022-01-06T06:53:51Z department: - _id: '79' doi: 10.1109/TNET.2012.2210241 issue: '3' page: 760--771 publication: IEEE/ACM Trans. Netw. status: public title: An Efficient and Fair MAC Protocol Robust to Reactive Interference type: journal_article user_id: '15504' year: '2013' ... --- _id: '476' abstract: - lang: eng text: 'An elementary h-route ow, for an integer h 1, is a set of h edge- disjoint paths between a source and a sink, each path carrying a unit of ow, and an h-route ow is a non-negative linear combination of elementary h-routeows. An h-route cut is a set of edges whose removal decreases the maximum h-route ow between a given source-sink pair (or between every source-sink pair in the multicommodity setting) to zero. The main result of this paper is an approximate duality theorem for multicommodity h-route cuts and ows, for h 3: The size of a minimum h-route cut is at least f=h and at most O(log4 k f) where f is the size of the maximum h-routeow and k is the number of commodities. The main step towards the proof of this duality is the design and analysis of a polynomial-time approximation algorithm for the minimum h-route cut problem for h = 3 that has an approximation ratio of O(log4 k). Previously, polylogarithmic approximation was known only for h-route cuts for h 2. A key ingredient of our algorithm is a novel rounding technique that we call multilevel ball-growing. Though the proof of the duality relies on this algorithm, it is not a straightforward corollary of it as in the case of classical multicommodity ows and cuts. Similar results are shown also for the sparsest multiroute cut problem.' author: - first_name: Petr full_name: Kolman, Petr last_name: Kolman - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Kolman P, Scheideler C. Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing. Theory of Computing Systems. 2013;(2):341-363. doi:10.1007/s00224-013-9454-3' apa: 'Kolman, P., & Scheideler, C. (2013). Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing. Theory of Computing Systems, (2), 341–363. https://doi.org/10.1007/s00224-013-9454-3' bibtex: '@article{Kolman_Scheideler_2013, title={Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing}, DOI={10.1007/s00224-013-9454-3}, number={2}, journal={Theory of Computing Systems}, publisher={Springer}, author={Kolman, Petr and Scheideler, Christian}, year={2013}, pages={341–363} }' chicago: 'Kolman, Petr, and Christian Scheideler. “Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing.” Theory of Computing Systems, no. 2 (2013): 341–63. https://doi.org/10.1007/s00224-013-9454-3.' ieee: 'P. Kolman and C. Scheideler, “Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing,” Theory of Computing Systems, no. 2, pp. 341–363, 2013.' mla: 'Kolman, Petr, and Christian Scheideler. “Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing.” Theory of Computing Systems, no. 2, Springer, 2013, pp. 341–63, doi:10.1007/s00224-013-9454-3.' short: P. Kolman, C. Scheideler, Theory of Computing Systems (2013) 341–363. date_created: 2017-10-17T12:42:24Z date_updated: 2022-01-06T07:01:21Z ddc: - '040' department: - _id: '79' doi: 10.1007/s00224-013-9454-3 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T14:07:18Z date_updated: 2018-03-15T14:07:18Z file_id: '1326' file_name: 476-tocsrevised3b.pdf file_size: 264308 relation: main_file success: 1 file_date_updated: 2018-03-15T14:07:18Z has_accepted_license: '1' issue: '2' page: 341-363 project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publication: Theory of Computing Systems publisher: Springer status: public title: 'Towards Duality of Multicommodity Multiroute Cuts and Flows: Multilevel Ball-Growing' type: journal_article user_id: '477' year: '2013' ... --- _id: '513' abstract: - lang: eng text: This paper initiates the study of self-adjusting networks (or distributed data structures) whose topologies dynamically adapt to a communication pattern $\sigma$. We present a fully decentralized self-adjusting solution called SplayNet. A SplayNet is a distributed generalization of the classic splay tree concept. It ensures short paths (which can be found using local-greedy routing) between communication partners while minimizing topological rearrangements. We derive an upper bound for the amortized communication cost of a SplayNet based on empirical entropies of $\sigma$, and show that SplayNets have several interesting convergence properties. For instance, SplayNets features a provable online optimality under special requests scenarios. We also investigate the optimal static network and prove different lower bounds for the average communication cost based on graph cuts and on the empirical entropy of the communication pattern $\sigma$. From these lower bounds it follows, e.g., that SplayNets are optimal in scenarios where the requests follow a product distribution as well. Finally, this paper shows that in contrast to the Minimum Linear Arrangement problem which is generally NP-hard, the optimal static tree network can be computed in polynomial time for any guest graph, despite the exponentially large graph family. We complement our formal analysis with a small simulation study on a Facebook graph. author: - first_name: Chen full_name: Avin, Chen last_name: Avin - first_name: Bernhard full_name: Häupler, Bernhard last_name: Häupler - first_name: Zvi full_name: Lotker, Zvi last_name: Lotker - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Stefan full_name: Schmid, Stefan last_name: Schmid citation: ama: 'Avin C, Häupler B, Lotker Z, Scheideler C, Schmid S. Locally Self-Adjusting Tree Networks. In: Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS). ; 2013:395-406. doi:10.1109/IPDPS.2013.40' apa: Avin, C., Häupler, B., Lotker, Z., Scheideler, C., & Schmid, S. (2013). Locally Self-Adjusting Tree Networks. In Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS) (pp. 395–406). https://doi.org/10.1109/IPDPS.2013.40 bibtex: '@inproceedings{Avin_Häupler_Lotker_Scheideler_Schmid_2013, title={Locally Self-Adjusting Tree Networks}, DOI={10.1109/IPDPS.2013.40}, booktitle={Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS)}, author={Avin, Chen and Häupler, Bernhard and Lotker, Zvi and Scheideler, Christian and Schmid, Stefan}, year={2013}, pages={395–406} }' chicago: Avin, Chen, Bernhard Häupler, Zvi Lotker, Christian Scheideler, and Stefan Schmid. “Locally Self-Adjusting Tree Networks.” In Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 395–406, 2013. https://doi.org/10.1109/IPDPS.2013.40. ieee: C. Avin, B. Häupler, Z. Lotker, C. Scheideler, and S. Schmid, “Locally Self-Adjusting Tree Networks,” in Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2013, pp. 395–406. mla: Avin, Chen, et al. “Locally Self-Adjusting Tree Networks.” Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2013, pp. 395–406, doi:10.1109/IPDPS.2013.40. short: 'C. Avin, B. Häupler, Z. Lotker, C. Scheideler, S. Schmid, in: Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS), 2013, pp. 395–406.' date_created: 2017-10-17T12:42:32Z date_updated: 2022-01-06T07:01:38Z ddc: - '040' department: - _id: '79' doi: 10.1109/IPDPS.2013.40 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T10:45:15Z date_updated: 2018-03-15T10:45:15Z file_id: '1303' file_name: 513-ipdps13_01.pdf file_size: 518804 relation: main_file success: 1 file_date_updated: 2018-03-15T10:45:15Z has_accepted_license: '1' page: 395-406 project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publication: Proceedings of the 27th IEEE International Parallel and Distributed Processing Symposium (IPDPS) status: public title: Locally Self-Adjusting Tree Networks type: conference user_id: '15504' year: '2013' ... --- _id: '519' abstract: - lang: eng text: In this work we present the first scalable distributed information system,i.e., a system with low storage overhead, that is provably robust againstDenial-of-Service (DoS) attacks by a current insider. We allow acurrent insider to have complete knowledge about the information systemand to have the power to block any \epsilon-fraction of its serversby a DoS-attack, where \epsilon can be chosen up to a constant. The taskof the system is to serve any collection of lookup requests with at most oneper non-blocked server in an efficient way despite this attack. Previously,scalable solutions were only known for DoS-attacks of past insiders, where apast insider only has complete knowledge about some past time pointt_0 of the information system. Scheideler et al. (DISC 2007, SPAA 2009) showedthat in this case it is possible to design an information system so that anyinformation that was inserted or last updated after t_0 is safe against a DoS-attack. But their constructions would not work at all for a current insider. The key idea behindour IRIS system is to make extensive use of coding. More precisely, we presenttwo alternative distributed coding strategies with an at most logarithmicstorage overhead that can handle up to a constant fraction of blocked servers. author: - first_name: Martina full_name: Eikel, Martina last_name: Eikel - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Eikel M, Scheideler C. IRIS: A Robust Information System Against Insider DoS-Attacks. In: Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). ; 2013:119-129. doi:10.1145/2486159.2486186' apa: 'Eikel, M., & Scheideler, C. (2013). IRIS: A Robust Information System Against Insider DoS-Attacks. In Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA) (pp. 119–129). https://doi.org/10.1145/2486159.2486186' bibtex: '@inproceedings{Eikel_Scheideler_2013, title={IRIS: A Robust Information System Against Insider DoS-Attacks}, DOI={10.1145/2486159.2486186}, booktitle={Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)}, author={Eikel, Martina and Scheideler, Christian}, year={2013}, pages={119–129} }' chicago: 'Eikel, Martina, and Christian Scheideler. “IRIS: A Robust Information System Against Insider DoS-Attacks.” In Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 119–29, 2013. https://doi.org/10.1145/2486159.2486186.' ieee: 'M. Eikel and C. Scheideler, “IRIS: A Robust Information System Against Insider DoS-Attacks,” in Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 2013, pp. 119–129.' mla: 'Eikel, Martina, and Christian Scheideler. “IRIS: A Robust Information System Against Insider DoS-Attacks.” Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 2013, pp. 119–29, doi:10.1145/2486159.2486186.' short: 'M. Eikel, C. Scheideler, in: Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 2013, pp. 119–129.' date_created: 2017-10-17T12:42:33Z date_updated: 2022-01-06T07:01:42Z ddc: - '040' department: - _id: '79' doi: 10.1145/2486159.2486186 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T10:38:34Z date_updated: 2018-03-15T10:38:34Z file_id: '1299' file_name: 519-iris-spaa2013_01.pdf file_size: 554618 relation: main_file success: 1 file_date_updated: 2018-03-15T10:38:34Z has_accepted_license: '1' page: 119-129 project: - _id: '1' name: SFB 901 - _id: '13' name: SFB 901 - Subprojekt C1 - _id: '4' name: SFB 901 - Project Area C publication: Proceedings of the 25th ACM Symposium on Parallelism in Algorithms and Architectures (SPAA) status: public title: 'IRIS: A Robust Information System Against Insider DoS-Attacks' type: conference user_id: '15504' year: '2013' ... --- _id: '542' abstract: - lang: eng text: 'We consider the problem of managing a dynamic heterogeneous storagesystem in a distributed way so that the amount of data assigned to a hostin that system is related to its capacity. Two central problems have to be solvedfor this: (1) organizing the hosts in an overlay network with low degree and diameterso that one can efficiently check the correct distribution of the data androute between any two hosts, and (2) distributing the data among the hosts so thatthe distribution respects the capacities of the hosts and can easily be adapted asthe set of hosts or their capacities change. We present distributed protocols forthese problems that are self-stabilizing and that do not need any global knowledgeabout the system such as the number of nodes or the overall capacity of thesystem. Prior to this work no solution was known satisfying these properties.' author: - first_name: Sebastian full_name: Kniesburges, Sebastian last_name: Kniesburges - first_name: Andreas full_name: Koutsopoulos, Andreas last_name: Koutsopoulos - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Kniesburges S, Koutsopoulos A, Scheideler C. CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system. In: Proceedings of the 27th International Symposium on Distributed Computing (DISC). LNCS. ; 2013:537-549. doi:10.1007/978-3-642-41527-2_37' apa: 'Kniesburges, S., Koutsopoulos, A., & Scheideler, C. (2013). CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system. In Proceedings of the 27th International Symposium on Distributed Computing (DISC) (pp. 537–549). https://doi.org/10.1007/978-3-642-41527-2_37' bibtex: '@inproceedings{Kniesburges_Koutsopoulos_Scheideler_2013, series={LNCS}, title={CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system}, DOI={10.1007/978-3-642-41527-2_37}, booktitle={Proceedings of the 27th International Symposium on Distributed Computing (DISC)}, author={Kniesburges, Sebastian and Koutsopoulos, Andreas and Scheideler, Christian}, year={2013}, pages={537–549}, collection={LNCS} }' chicago: 'Kniesburges, Sebastian, Andreas Koutsopoulos, and Christian Scheideler. “CONE-DHT: A Distributed Self-Stabilizing Algorithm for a Heterogeneous Storage System.” In Proceedings of the 27th International Symposium on Distributed Computing (DISC), 537–49. LNCS, 2013. https://doi.org/10.1007/978-3-642-41527-2_37.' ieee: 'S. Kniesburges, A. Koutsopoulos, and C. Scheideler, “CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system,” in Proceedings of the 27th International Symposium on Distributed Computing (DISC), 2013, pp. 537–549.' mla: 'Kniesburges, Sebastian, et al. “CONE-DHT: A Distributed Self-Stabilizing Algorithm for a Heterogeneous Storage System.” Proceedings of the 27th International Symposium on Distributed Computing (DISC), 2013, pp. 537–49, doi:10.1007/978-3-642-41527-2_37.' short: 'S. Kniesburges, A. Koutsopoulos, C. Scheideler, in: Proceedings of the 27th International Symposium on Distributed Computing (DISC), 2013, pp. 537–549.' date_created: 2017-10-17T12:42:38Z date_updated: 2022-01-06T07:01:53Z ddc: - '040' department: - _id: '79' doi: 10.1007/978-3-642-41527-2_37 file: - access_level: closed content_type: application/pdf creator: florida date_created: 2018-03-15T10:32:48Z date_updated: 2018-03-15T10:32:48Z file_id: '1289' file_name: 542-CONE-DHT_A_distributed_self-stabilizing_algorithm_for_a_heterogeneous_storage_system.pdf file_size: 262302 relation: main_file success: 1 file_date_updated: 2018-03-15T10:32:48Z has_accepted_license: '1' page: 537-549 project: - _id: '1' name: SFB 901 - _id: '13' name: SFB 901 - Subprojekt C1 - _id: '4' name: SFB 901 - Project Area C publication: Proceedings of the 27th International Symposium on Distributed Computing (DISC) series_title: LNCS status: public title: 'CONE-DHT: A distributed self-stabilizing algorithm for a heterogeneous storage system' type: conference user_id: '15504' year: '2013' ...