--- _id: '21628' abstract: - lang: eng text: "This thesis considers the realization of distributed data structures and the construction of distributed protocols for self-stabilizing overlay networks.\r\n\r\nIn the first part of this thesis, we provide distributed protocols for queues, stacks and priority queues that serve the insertion and deletion of elements within a logarithmic amount of rounds.\r\nOur protocols respect semantic constraints such as sequential consistency or serializability and the individual semantic constraints given by the type (queue, stack, priority queue) of the data structure.\r\nWe furthermore provide a protocol that handles joining and leaving nodes.\r\nAs an important side product, we present a novel protocol solving the distributed $k$-selection problem in a logarithmic amount of rounds, that is, to find the $k$-smallest elements among a polynomial number of elements spread among $n$ nodes.\r\n\t\r\nThe second part of this thesis is devoted to the construction of protocols for self-stabilizing overlay networks, i.e., distributed protocols that transform an overlay network from any initial (potentially illegitimate) state into a legitimate state in finite time.\r\nWe present protocols for self-stabilizing generalized De Bruijn graphs, self-stabilizing quadtrees and self-stabilizing supervised skip rings.\r\nEach of those protocols comes with unique properties that makes it interesting for certain distributed applications.\r\nGeneralized De Bruijn networks provide routing within a constant amount of hops, thus serving the interest in networks that require a low latency for requests.\r\nThe protocol for the quadtree guarantees monotonic searchability as well as a geometric variant of monotonic searchability, making it interesting for wireless networks or applications needed in the area of computational geometry.\r\nThe supervised skip ring can be used to construct a self-stabilizing publish-subscribe system.\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann citation: ama: Feldmann M. Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks.; 2021. doi:10.17619/UNIPB/1-1113 apa: Feldmann, M. (2021). Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks. https://doi.org/10.17619/UNIPB/1-1113 bibtex: '@book{Feldmann_2021, title={Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks}, DOI={10.17619/UNIPB/1-1113}, author={Feldmann, Michael}, year={2021} }' chicago: Feldmann, Michael. Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks, 2021. https://doi.org/10.17619/UNIPB/1-1113. ieee: M. Feldmann, Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks. 2021. mla: Feldmann, Michael. Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks. 2021, doi:10.17619/UNIPB/1-1113. short: M. Feldmann, Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks, 2021. date_created: 2021-04-15T08:23:52Z date_updated: 2022-01-06T06:55:08Z ddc: - '006' department: - _id: '79' doi: 10.17619/UNIPB/1-1113 file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2021-04-15T08:21:15Z date_updated: 2021-04-15T08:21:15Z file_id: '21629' file_name: Dissertation_Michael_Feldmann.pdf file_size: 2617069 relation: main_file success: 1 file_date_updated: 2021-04-15T08:21:15Z has_accepted_license: '1' language: - iso: eng project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 status: public supervisor: - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler title: Algorithms for Distributed Data Structures and Self-Stabilizing Overlay Networks type: dissertation user_id: '23538' year: '2021' ... --- _id: '20755' abstract: - lang: eng text: "We consider the problem of computing shortest paths in \\emph{hybrid networks}, in which nodes can make use of different communication modes. For example, mobile phones may use ad-hoc connections via Bluetooth or Wi-Fi in addition to the cellular network to solve tasks more efficiently. Like in this case, the different communication modes may differ considerably in range, bandwidth, and flexibility. We build upon the model of Augustine et al. [SODA '20], which captures these differences by a \\emph{local} and a \\emph{global} mode. Specifically, the local edges model a fixed communication network in which $O(1)$ messages of size $O(\\log n)$ can be sent over every edge in each synchronous round. The global edges form a clique, but nodes are only allowed to send and receive a total of at most $O(\\log n)$ messages over global edges, which restricts the nodes to use these edges only very sparsely.\r\n\r\nWe demonstrate the power of hybrid networks by presenting algorithms to compute Single-Source Shortest Paths and the diameter very efficiently in \\emph{sparse graphs}. Specifically, we present exact $O(\\log n)$ time algorithms for cactus graphs (i.e., graphs in which each edge is contained in at most one cycle), and $3$-approximations for graphs that have at most $n + O(n^{1/3})$ edges and arboricity $O(\\log n)$. For these graph classes, our algorithms provide exponentially faster solutions than the best known algorithms for general graphs in this model.\r\nBeyond shortest paths, we also provide a variety of useful tools and techniques for hybrid networks, which may be of independent interest.\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Kristian full_name: Hinnenthal, Kristian id: '32229' last_name: Hinnenthal - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Hinnenthal K, Scheideler C. Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs. In: Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS). Schloss Dagstuhl - Leibniz-Zentrum für Informatik; 2020. doi:10.4230/LIPIcs.OPODIS.2020.31' apa: Feldmann, M., Hinnenthal, K., & Scheideler, C. (2020). Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs. In Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS). Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.OPODIS.2020.31 bibtex: '@inproceedings{Feldmann_Hinnenthal_Scheideler_2020, title={Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs}, DOI={10.4230/LIPIcs.OPODIS.2020.31}, booktitle={Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS)}, publisher={Schloss Dagstuhl - Leibniz-Zentrum für Informatik}, author={Feldmann, Michael and Hinnenthal, Kristian and Scheideler, Christian}, year={2020} }' chicago: Feldmann, Michael, Kristian Hinnenthal, and Christian Scheideler. “Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs.” In Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS). Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020. https://doi.org/10.4230/LIPIcs.OPODIS.2020.31. ieee: M. Feldmann, K. Hinnenthal, and C. Scheideler, “Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs,” in Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS), 2020. mla: Feldmann, Michael, et al. “Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs.” Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS), Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020, doi:10.4230/LIPIcs.OPODIS.2020.31. short: 'M. Feldmann, K. Hinnenthal, C. Scheideler, in: Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS), Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020.' date_created: 2020-12-16T10:20:18Z date_updated: 2022-01-06T06:54:36Z ddc: - '000' department: - _id: '79' doi: 10.4230/LIPIcs.OPODIS.2020.31 external_id: arxiv: - '2007.01191' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2020-12-16T10:18:50Z date_updated: 2020-12-16T10:18:50Z file_id: '20756' file_name: Fast_Hybrid_Network_Algorithms_for_Shortest_Paths_in_Sparse_Graphs.pdf file_size: 867373 relation: main_file success: 1 file_date_updated: 2020-12-16T10:18:50Z has_accepted_license: '1' language: - iso: eng project: - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 - _id: '1' name: SFB 901 publication: Proceedings of the 24th International Conference on Principles of Distributed Systems (OPODIS) publisher: Schloss Dagstuhl - Leibniz-Zentrum für Informatik status: public title: Fast Hybrid Network Algorithms for Shortest Paths in Sparse Graphs type: conference user_id: '23538' year: '2020' ... --- _id: '16902' abstract: - lang: eng text: "The maintenance of efficient and robust overlay networks is one\r\nof the most fundamental and reoccurring themes in networking.\r\nThis paper presents a survey of state-of-the-art \r\nalgorithms to design and repair overlay networks in a distributed\r\nmanner. In particular, we discuss basic algorithmic primitives\r\nto preserve connectivity, review algorithms for the fundamental\r\nproblem of graph linearization, and then survey self-stabilizing\r\nalgorithms for metric and scalable topologies. \r\nWe also identify open problems and avenues for future research.\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Stefan full_name: Schmid, Stefan last_name: Schmid citation: ama: Feldmann M, Scheideler C, Schmid S. Survey on Algorithms for Self-Stabilizing Overlay Networks. ACM Computing Surveys. 2020. doi:10.1145/3397190 apa: Feldmann, M., Scheideler, C., & Schmid, S. (2020). Survey on Algorithms for Self-Stabilizing Overlay Networks. ACM Computing Surveys. https://doi.org/10.1145/3397190 bibtex: '@article{Feldmann_Scheideler_Schmid_2020, title={Survey on Algorithms for Self-Stabilizing Overlay Networks}, DOI={10.1145/3397190}, journal={ACM Computing Surveys}, publisher={ACM}, author={Feldmann, Michael and Scheideler, Christian and Schmid, Stefan}, year={2020} }' chicago: Feldmann, Michael, Christian Scheideler, and Stefan Schmid. “Survey on Algorithms for Self-Stabilizing Overlay Networks.” ACM Computing Surveys, 2020. https://doi.org/10.1145/3397190. ieee: M. Feldmann, C. Scheideler, and S. Schmid, “Survey on Algorithms for Self-Stabilizing Overlay Networks,” ACM Computing Surveys, 2020. mla: Feldmann, Michael, et al. “Survey on Algorithms for Self-Stabilizing Overlay Networks.” ACM Computing Surveys, ACM, 2020, doi:10.1145/3397190. short: M. Feldmann, C. Scheideler, S. Schmid, ACM Computing Surveys (2020). date_created: 2020-04-29T07:09:50Z date_updated: 2022-01-06T06:52:58Z department: - _id: '79' doi: 10.1145/3397190 language: - iso: eng project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 publication: ACM Computing Surveys publisher: ACM status: public title: Survey on Algorithms for Self-Stabilizing Overlay Networks type: journal_article user_id: '23538' year: '2020' ... --- _id: '16903' abstract: - lang: eng text: "We consider the clock synchronization problem in the (discrete) beeping model: Given a network of $n$ nodes with each node having a clock value $\\delta(v) \\in \\{0,\\ldots T-1\\}$, the goal is to synchronize the clock values of all nodes such that they have the same value in any round.\r\nAs is standard in clock synchronization, we assume \\emph{arbitrary activations} for all nodes, i.e., the nodes start their protocol at an arbitrary round (not limited to $\\{0,\\ldots,T-1\\}$).\r\nWe give an asymptotically optimal algorithm that runs in $4D + \\Bigl\\lfloor \\frac{D}{\\lfloor T/4 \\rfloor} \\Bigr \\rfloor \\cdot (T \\mod 4) = O(D)$ rounds, where $D$ is the diameter of the network.\r\nOnce all nodes are in sync, they beep at the same round every $T$ rounds.\r\nThe algorithm drastically improves on the $O(T D)$-bound of \\cite{firefly_sync} (where $T$ is required to be at least $4n$, so the bound is no better than $O(nD)$).\r\nOur algorithm is very simple as nodes only have to maintain $3$ bits in addition to the $\\lceil \\log T \\rceil$ bits needed to maintain the clock.\r\nFurthermore we investigate the complexity of \\emph{self-stabilizing} solutions for the clock synchronization problem: We first show lower bounds of $\\Omega(\\max\\{T,n\\})$ rounds on the runtime and $\\Omega(\\log(\\max\\{T,n\\}))$ bits of memory required for any such protocol.\r\nAfterwards we present a protocol that runs in $O(\\max\\{T,n\\})$ rounds using at most $O(\\log(\\max\\{T,n\\}))$ bits at each node, which is asymptotically optimal with regards to both, runtime and memory requirements." author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Ardalan full_name: Khazraei, Ardalan last_name: Khazraei - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Khazraei A, Scheideler C. Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model. In: Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). ACM; 2020. doi:10.1145/3350755.3400246' apa: Feldmann, M., Khazraei, A., & Scheideler, C. (2020). Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model. In Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). ACM. https://doi.org/10.1145/3350755.3400246 bibtex: '@inproceedings{Feldmann_Khazraei_Scheideler_2020, title={Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model}, DOI={10.1145/3350755.3400246}, booktitle={Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)}, publisher={ACM}, author={Feldmann, Michael and Khazraei, Ardalan and Scheideler, Christian}, year={2020} }' chicago: Feldmann, Michael, Ardalan Khazraei, and Christian Scheideler. “Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model.” In Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). ACM, 2020. https://doi.org/10.1145/3350755.3400246. ieee: M. Feldmann, A. Khazraei, and C. Scheideler, “Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model,” in Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 2020. mla: Feldmann, Michael, et al. “Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model.” Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), ACM, 2020, doi:10.1145/3350755.3400246. short: 'M. Feldmann, A. Khazraei, C. Scheideler, in: Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), ACM, 2020.' date_created: 2020-04-29T07:16:35Z date_updated: 2022-01-06T06:52:58Z department: - _id: '79' doi: 10.1145/3350755.3400246 external_id: arxiv: - '2005.07388' language: - iso: eng project: - _id: '96' name: Algorithmen für programmierbare Materie in einem physiologischen Medium publication: Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures (SPAA) publisher: ACM status: public title: Time- and Space-Optimal Discrete Clock Synchronization in the Beeping Model type: conference user_id: '23538' year: '2020' ... --- _id: '8534' abstract: - lang: eng text: "We propose two protocols for distributed priority queues (denoted by 'heap' for simplicity in this paper) called SKEAP and SEAP. SKEAP realizes a distributed heap for a constant amount of priorities and SEAP one for an arbitrary amount. Both protocols build on an overlay, which induces an aggregation tree on which heap operations are aggregated in batches, ensuring that our protocols scale even for a high rate of incoming requests. As part of SEAP we provide a novel distributed protocol for the k-selection problem that runs in time O(log n) w.h.p. SKEAP guarantees sequential consistency for its heap operations, while SEAP guarantees serializability. SKEAP and SEAP provide logarithmic runtimes w.h.p. on all their operations. \r\nSKEAP and SEAP provide logarithmic runtimes w.h.p. on all their operations with SEAP having to use only O(log n) bit messages." author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Scheideler C. Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities. In: Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA). ACM; 2019:287--296. doi:10.1145/3323165.3323193' apa: 'Feldmann, M., & Scheideler, C. (2019). Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities. In Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA) (pp. 287--296). ACM. https://doi.org/10.1145/3323165.3323193' bibtex: '@inproceedings{Feldmann_Scheideler_2019, title={Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities}, DOI={10.1145/3323165.3323193}, booktitle={Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA)}, publisher={ACM}, author={Feldmann, Michael and Scheideler, Christian}, year={2019}, pages={287--296} }' chicago: 'Feldmann, Michael, and Christian Scheideler. “Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities.” In Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 287--296. ACM, 2019. https://doi.org/10.1145/3323165.3323193.' ieee: 'M. Feldmann and C. Scheideler, “Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities,” in Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), 2019, pp. 287--296.' mla: 'Feldmann, Michael, and Christian Scheideler. “Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities.” Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), ACM, 2019, pp. 287--296, doi:10.1145/3323165.3323193.' short: 'M. Feldmann, C. Scheideler, in: Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA), ACM, 2019, pp. 287--296.' date_created: 2019-03-21T14:37:26Z date_updated: 2022-01-06T07:03:56Z ddc: - '004' department: - _id: '79' doi: 10.1145/3323165.3323193 external_id: arxiv: - '1805.03472' file: - access_level: closed content_type: application/pdf creator: ups date_created: 2019-08-26T09:14:32Z date_updated: 2019-08-26T09:14:32Z file_id: '12954' file_name: p287-feldmann.pdf file_size: 1295095 relation: main_file success: 1 file_date_updated: 2019-08-26T09:14:32Z has_accepted_license: '1' language: - iso: eng page: 287--296 project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 publication: Proceedings of the 31st ACM Symposium on Parallelism in Algorithms and Architectures (SPAA) publisher: ACM status: public title: 'Skeap & Seap: Scalable Distributed Priority Queues for Constant and Arbitrary Priorities' type: conference user_id: '477' year: '2019' ... --- _id: '13182' abstract: - lang: eng text: "We consider congestion control in peer-to-peer distributed systems. \r\nThe problem can be reduced to the following scenario: Consider a set $V$ of $n$ peers (called \\emph{clients} in this paper) that want to send messages to a fixed common peer (called \\emph{server} in this paper).\r\nWe assume that each client $v \\in V$ sends a message with probability $p(v) \\in [0,1)$ and the server has a capacity of $\\sigma \\in \\mathbb{N}$, i.e., it can recieve at most $\\sigma$ messages per round and excess messages are dropped.\r\nThe server can modify these probabilities when clients send messages.\r\nIdeally, we wish to converge to a state with $\\sum p(v) = \\sigma$ and $p(v) = p(w)$ for all $v,w \\in V$.\t\r\n\r\nWe propose a \\emph{loosely} self-stabilizing protocol with a slightly relaxed legitimate state. \ \r\nOur protocol lets the system converge from \\emph{any} initial state to a state where $\\sum p(v) \\in \\left[\\sigma \\pm \\epsilon\\right]$ and $|p(v)-p(w)| \\in O(\\frac{1}{n})$. \r\nThis property is then maintained for $\\Omega(n^{\\mathfrak{c}})$ rounds in expectation.\r\nIn particular, the initial client probabilities and server variables are not necessarily well-defined, i.e., they may have arbitrary values.\r\n\r\nOur protocol uses only $O(W + \\log n)$ bits of memory where $W$ is length of node identifiers, making it very lightweight.\r\nFinally we state a lower bound on the convergence time an see that our protocol performs asymptotically optimal (up to some polylogarithmic factor).\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Thorsten full_name: Götte, Thorsten id: '34727' last_name: Götte - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Götte T, Scheideler C. A Loosely Self-stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory. In: Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS). Lecture Notes in Computer Science. Springer, Cham; 2019:149-164. doi:https://doi.org/10.1007/978-3-030-34992-9_13' apa: Feldmann, M., Götte, T., & Scheideler, C. (2019). A Loosely Self-stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory. In Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) (pp. 149–164). Springer, Cham. https://doi.org/10.1007/978-3-030-34992-9_13 bibtex: '@inproceedings{Feldmann_Götte_Scheideler_2019, series={Lecture Notes in Computer Science}, title={A Loosely Self-stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory}, DOI={https://doi.org/10.1007/978-3-030-34992-9_13}, booktitle={Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)}, publisher={Springer, Cham}, author={Feldmann, Michael and Götte, Thorsten and Scheideler, Christian}, year={2019}, pages={149–164}, collection={Lecture Notes in Computer Science} }' chicago: Feldmann, Michael, Thorsten Götte, and Christian Scheideler. “A Loosely Self-Stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory.” In Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 149–64. Lecture Notes in Computer Science. Springer, Cham, 2019. https://doi.org/10.1007/978-3-030-34992-9_13. ieee: M. Feldmann, T. Götte, and C. Scheideler, “A Loosely Self-stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory,” in Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 2019, pp. 149–164. mla: Feldmann, Michael, et al. “A Loosely Self-Stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory.” Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), Springer, Cham, 2019, pp. 149–64, doi:https://doi.org/10.1007/978-3-030-34992-9_13. short: 'M. Feldmann, T. Götte, C. Scheideler, in: Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), Springer, Cham, 2019, pp. 149–164.' date_created: 2019-09-10T12:48:33Z date_updated: 2022-01-06T06:51:30Z ddc: - '000' department: - _id: '79' doi: https://doi.org/10.1007/978-3-030-34992-9_13 external_id: arxiv: - '1909.04544' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2019-09-11T11:20:16Z date_updated: 2019-09-11T11:20:16Z file_id: '13188' file_name: main.pdf file_size: 428908 relation: main_file success: 1 file_date_updated: 2019-09-11T11:20:16Z has_accepted_license: '1' language: - iso: eng page: 149-164 project: - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 - _id: '1' name: SFB 901 publication: Proceedings of the 21st International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) publisher: Springer, Cham series_title: Lecture Notes in Computer Science status: public title: A Loosely Self-stabilizing Protocol for Randomized Congestion Control with Logarithmic Memory type: conference user_id: '23538' year: '2019' ... --- _id: '1163' abstract: - lang: eng text: "In this paper we present two major results:\r\nFirst, we introduce the first self-stabilizing version of a supervised overlay network (as introduced in~\\cite{DBLP:conf/ispan/KothapalliS05}) by presenting a self-stabilizing supervised skip ring.\r\nSecondly, we show how to use the self-stabilizing supervised skip ring to construct an efficient self-stabilizing publish-subscribe system.\r\nThat is, in addition to stabilizing the overlay network, every subscriber of a topic will eventually know all of the publications that have been issued so far for that topic. The communication work needed to processes a subscribe or unsubscribe operation is just a constant in a legitimate state, and the communication work of checking whether the system is still in a legitimate state is just a constant on expectation for the supervisor as well as any process in the system.\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christina full_name: Kolb, Christina id: '43647' last_name: Kolb - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Thim Frederik full_name: Strothmann, Thim Frederik id: '11319' last_name: Strothmann citation: ama: 'Feldmann M, Kolb C, Scheideler C, Strothmann TF. Self-Stabilizing Supervised Publish-Subscribe Systems. In: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). IEEE; 2018. doi:10.1109/IPDPS.2018.00114' apa: 'Feldmann, M., Kolb, C., Scheideler, C., & Strothmann, T. F. (2018). Self-Stabilizing Supervised Publish-Subscribe Systems. In Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). Vancouver: IEEE. https://doi.org/10.1109/IPDPS.2018.00114' bibtex: '@inproceedings{Feldmann_Kolb_Scheideler_Strothmann_2018, title={Self-Stabilizing Supervised Publish-Subscribe Systems}, DOI={10.1109/IPDPS.2018.00114}, booktitle={Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS)}, publisher={IEEE}, author={Feldmann, Michael and Kolb, Christina and Scheideler, Christian and Strothmann, Thim Frederik}, year={2018} }' chicago: Feldmann, Michael, Christina Kolb, Christian Scheideler, and Thim Frederik Strothmann. “Self-Stabilizing Supervised Publish-Subscribe Systems.” In Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). IEEE, 2018. https://doi.org/10.1109/IPDPS.2018.00114. ieee: M. Feldmann, C. Kolb, C. Scheideler, and T. F. Strothmann, “Self-Stabilizing Supervised Publish-Subscribe Systems,” in Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), Vancouver, 2018. mla: Feldmann, Michael, et al. “Self-Stabilizing Supervised Publish-Subscribe Systems.” Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), IEEE, 2018, doi:10.1109/IPDPS.2018.00114. short: 'M. Feldmann, C. Kolb, C. Scheideler, T.F. Strothmann, in: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), IEEE, 2018.' conference: end_date: 2018-5-24 location: Vancouver name: 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS) start_date: 2018-5-22 date_created: 2018-02-01T13:56:01Z date_updated: 2022-01-06T06:51:05Z ddc: - '040' department: - _id: '79' - _id: '66' doi: 10.1109/IPDPS.2018.00114 external_id: arxiv: - '1710.08128' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2018-10-31T13:25:37Z date_updated: 2018-10-31T13:25:37Z file_id: '5211' file_name: 08425258.pdf file_size: 239559 relation: main_file success: 1 file_date_updated: 2018-10-31T13:25:37Z has_accepted_license: '1' keyword: - Topological Self-stabilization - Supervised Overlay - Publish-Subscribe System language: - iso: eng project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 publication: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS) publisher: IEEE status: public title: Self-Stabilizing Supervised Publish-Subscribe Systems type: conference user_id: '11319' year: '2018' ... --- _id: '1164' abstract: - lang: eng text: "We propose a distributed protocol for a queue, called Skueue, which spreads its data fairly onto multiple processes, avoiding bottlenecks in high throughput scenarios.\r\nSkueuecan be used in highly dynamic environments, through the addition of join and leave requests to the standard queue operations enqueue and dequeue.\r\nFurthermore Skueue satisfies sequential consistency in the asynchronous message passing model.\r\nScalability is achieved by aggregating multiple requests to a batch, which can then be processed in a distributed fashion without hurting the queue semantics.\r\nOperations in Skueue need a logarithmic number of rounds w.h.p. until they are processed, even under a high rate of incoming requests." author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler - first_name: Alexander full_name: Setzer, Alexander id: '11108' last_name: Setzer citation: ama: 'Feldmann M, Scheideler C, Setzer A. Skueue: A Scalable and Sequentially Consistent Distributed Queue. In: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). IEEE; 2018. doi:10.1109/IPDPS.2018.00113' apa: 'Feldmann, M., Scheideler, C., & Setzer, A. (2018). Skueue: A Scalable and Sequentially Consistent Distributed Queue. In Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). Vancouver: IEEE. https://doi.org/10.1109/IPDPS.2018.00113' bibtex: '@inproceedings{Feldmann_Scheideler_Setzer_2018, title={Skueue: A Scalable and Sequentially Consistent Distributed Queue}, DOI={10.1109/IPDPS.2018.00113}, booktitle={Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS)}, publisher={IEEE}, author={Feldmann, Michael and Scheideler, Christian and Setzer, Alexander}, year={2018} }' chicago: 'Feldmann, Michael, Christian Scheideler, and Alexander Setzer. “Skueue: A Scalable and Sequentially Consistent Distributed Queue.” In Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS). IEEE, 2018. https://doi.org/10.1109/IPDPS.2018.00113.' ieee: 'M. Feldmann, C. Scheideler, and A. Setzer, “Skueue: A Scalable and Sequentially Consistent Distributed Queue,” in Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), Vancouver, 2018.' mla: 'Feldmann, Michael, et al. “Skueue: A Scalable and Sequentially Consistent Distributed Queue.” Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), IEEE, 2018, doi:10.1109/IPDPS.2018.00113.' short: 'M. Feldmann, C. Scheideler, A. Setzer, in: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS), IEEE, 2018.' conference: end_date: 2018-5-24 location: Vancouver name: 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS) start_date: 2018-5-22 date_created: 2018-02-01T14:00:36Z date_updated: 2022-01-06T06:51:05Z ddc: - '040' department: - _id: '79' doi: 10.1109/IPDPS.2018.00113 external_id: arxiv: - '1802.07504' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2018-10-31T13:29:26Z date_updated: 2018-10-31T13:29:26Z file_id: '5212' file_name: 08425257.pdf file_size: 218420 relation: main_file success: 1 file_date_updated: 2018-10-31T13:29:26Z has_accepted_license: '1' language: - iso: eng project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 publication: Proceedings of the 32nd IEEE International Parallel & Distributed Processing Symposium (IPDPS) publisher: IEEE status: public title: 'Skueue: A Scalable and Sequentially Consistent Distributed Queue' type: conference user_id: '23538' year: '2018' ... --- _id: '4351' abstract: - lang: eng text: "\tWe extend the concept of monotonic searchability~\\cite{DBLP:conf/opodis/ScheidelerSS15}~\\cite{DBLP:conf/wdag/ScheidelerSS16} for self-stabilizing systems from one to multiple dimensions.\r\n\tA system is self-stabilizing if it can recover to a legitimate state from any initial illegal state.\r\n\tThese kind of systems are most often used in distributed applications.\r\n\tMonotonic searchability provides guarantees when searching for nodes while the recovery process is going on.\r\n\tMore precisely, if a search request started at some node $u$ succeeds in reaching its destination $v$, then all future search requests from $u$ to $v$ succeed as well.\r\n\tAlthough there already exists a self-stabilizing protocol for a two-dimensional topology~\\cite{DBLP:journals/tcs/JacobRSS12} and an universal approach for monotonic searchability~\\cite{DBLP:conf/wdag/ScheidelerSS16}, it is not clear how both of these concepts fit together effectively.\r\n\tThe latter concept even comes with some restrictive assumptions on messages, which is not the case for our protocol.\r\n\tWe propose a simple novel protocol for a self-stabilizing two-dimensional quadtree that satisfies monotonic searchability.\r\n\tOur protocol can easily be extended to higher dimensions and offers routing in $\\mathcal O(\\log n)$ hops for any search request.\r\n" author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christina full_name: Kolb, Christina id: '43647' last_name: Kolb - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Kolb C, Scheideler C. Self-stabilizing Overlays for high-dimensional Monotonic Searchability. In: Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS). Vol 11201. Lecture Notes in Computer Science. Springer, Cham; 2018:16-31. doi:10.1007/978-3-030-03232-6_2' apa: Feldmann, M., Kolb, C., & Scheideler, C. (2018). Self-stabilizing Overlays for high-dimensional Monotonic Searchability. In Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) (Vol. 11201, pp. 16–31). Springer, Cham. https://doi.org/10.1007/978-3-030-03232-6_2 bibtex: '@inproceedings{Feldmann_Kolb_Scheideler_2018, series={Lecture Notes in Computer Science}, title={Self-stabilizing Overlays for high-dimensional Monotonic Searchability}, volume={11201}, DOI={10.1007/978-3-030-03232-6_2}, booktitle={Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)}, publisher={Springer, Cham}, author={Feldmann, Michael and Kolb, Christina and Scheideler, Christian}, year={2018}, pages={16–31}, collection={Lecture Notes in Computer Science} }' chicago: Feldmann, Michael, Christina Kolb, and Christian Scheideler. “Self-Stabilizing Overlays for High-Dimensional Monotonic Searchability.” In Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 11201:16–31. Lecture Notes in Computer Science. Springer, Cham, 2018. https://doi.org/10.1007/978-3-030-03232-6_2. ieee: M. Feldmann, C. Kolb, and C. Scheideler, “Self-stabilizing Overlays for high-dimensional Monotonic Searchability,” in Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 2018, vol. 11201, pp. 16–31. mla: Feldmann, Michael, et al. “Self-Stabilizing Overlays for High-Dimensional Monotonic Searchability.” Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), vol. 11201, Springer, Cham, 2018, pp. 16–31, doi:10.1007/978-3-030-03232-6_2. short: 'M. Feldmann, C. Kolb, C. Scheideler, in: Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), Springer, Cham, 2018, pp. 16–31.' date_created: 2018-09-04T14:15:39Z date_updated: 2022-01-06T07:00:58Z ddc: - '040' department: - _id: '79' doi: 10.1007/978-3-030-03232-6_2 external_id: arxiv: - '1808.10300' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2018-10-31T13:24:17Z date_updated: 2018-10-31T13:24:17Z file_id: '5210' file_name: Feldmann2018_Chapter_Self-stabilizingOverlaysForHig.pdf file_size: 329823 relation: main_file success: 1 file_date_updated: 2018-10-31T13:24:17Z has_accepted_license: '1' intvolume: ' 11201' language: - iso: eng page: '16-31 ' project: - _id: '1' name: SFB 901 - _id: '2' name: SFB 901 - Project Area A - _id: '5' name: SFB 901 - Subproject A1 publication: Proceedings of the 20th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) publication_identifier: unknown: - 978-3-030-03231-9 publisher: Springer, Cham series_title: Lecture Notes in Computer Science status: public title: Self-stabilizing Overlays for high-dimensional Monotonic Searchability type: conference user_id: '23538' volume: 11201 year: '2018' ... --- _id: '125' abstract: - lang: eng text: 'Searching for other participants is one of the most important operations in a distributed system.We are interested in topologies in which it is possible to route a packet in a fixed number of hops until it arrives at its destination.Given a constant $d$, this paper introduces a new self-stabilizing protocol for the $q$-ary $d$-dimensional de Bruijn graph ($q = \sqrt[d]{n}$) that is able to route any search request in at most $d$ hops w.h.p., while significantly lowering the node degree compared to the clique: We require nodes to have a degree of $\mathcal O(\sqrt[d]{n})$, which is asymptotically optimal for a fixed diameter $d$.The protocol keeps the expected amount of edge redirections per node in $\mathcal O(\sqrt[d]{n})$, when the number of nodes in the system increases by factor $2^d$.The number of messages that are periodically sent out by nodes is constant.' author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler citation: ama: 'Feldmann M, Scheideler C. A Self-Stabilizing General De Bruijn Graph. In: Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS). Vol 10616. Lecture Notes in Computer Science. Springer, Cham; 2017:250-264. doi:10.1007/978-3-319-69084-1_17' apa: Feldmann, M., & Scheideler, C. (2017). A Self-Stabilizing General De Bruijn Graph. In Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) (Vol. 10616, pp. 250–264). Springer, Cham. https://doi.org/10.1007/978-3-319-69084-1_17 bibtex: '@inproceedings{Feldmann_Scheideler_2017, series={Lecture Notes in Computer Science}, title={A Self-Stabilizing General De Bruijn Graph}, volume={10616}, DOI={10.1007/978-3-319-69084-1_17}, booktitle={Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)}, publisher={Springer, Cham}, author={Feldmann, Michael and Scheideler, Christian}, year={2017}, pages={250–264}, collection={Lecture Notes in Computer Science} }' chicago: Feldmann, Michael, and Christian Scheideler. “A Self-Stabilizing General De Bruijn Graph.” In Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 10616:250–64. Lecture Notes in Computer Science. Springer, Cham, 2017. https://doi.org/10.1007/978-3-319-69084-1_17. ieee: M. Feldmann and C. Scheideler, “A Self-Stabilizing General De Bruijn Graph,” in Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), 2017, vol. 10616, pp. 250–264. mla: Feldmann, Michael, and Christian Scheideler. “A Self-Stabilizing General De Bruijn Graph.” Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), vol. 10616, Springer, Cham, 2017, pp. 250–64, doi:10.1007/978-3-319-69084-1_17. short: 'M. Feldmann, C. Scheideler, in: Proceedings of the 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS), Springer, Cham, 2017, pp. 250–264.' date_created: 2017-10-17T12:41:16Z date_updated: 2022-01-06T06:51:19Z ddc: - '040' department: - _id: '79' doi: 10.1007/978-3-319-69084-1_17 external_id: arxiv: - '1708.06542' file: - access_level: closed content_type: application/pdf creator: mfeldma2 date_created: 2018-10-31T13:30:13Z date_updated: 2018-10-31T13:30:13Z file_id: '5214' file_name: Feldmann-Scheideler2017_Chapter_ASelf-stabilizingGeneralDeBrui.pdf file_size: 311204 relation: main_file success: 1 file_date_updated: 2018-10-31T13:30:13Z has_accepted_license: '1' intvolume: ' 10616' language: - iso: eng page: '250-264 ' 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 19th International Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS) publication_identifier: isbn: - 978-3-319-69083-4 publication_status: published publisher: Springer, Cham series_title: Lecture Notes in Computer Science status: public title: A Self-Stabilizing General De Bruijn Graph type: conference user_id: '23538' volume: 10616 year: '2017' ... --- _id: '278' author: - first_name: Michael full_name: Feldmann, Michael id: '23538' last_name: Feldmann citation: ama: Feldmann M. Monotonic Searchability for Distributed Sorted Lists and De Bruijn Graphs. Universität Paderborn; 2015. apa: Feldmann, M. (2015). Monotonic Searchability for distributed sorted Lists and De Bruijn Graphs. Universität Paderborn. bibtex: '@book{Feldmann_2015, title={Monotonic Searchability for distributed sorted Lists and De Bruijn Graphs}, publisher={Universität Paderborn}, author={Feldmann, Michael}, year={2015} }' chicago: Feldmann, Michael. Monotonic Searchability for Distributed Sorted Lists and De Bruijn Graphs. Universität Paderborn, 2015. ieee: M. Feldmann, Monotonic Searchability for distributed sorted Lists and De Bruijn Graphs. Universität Paderborn, 2015. mla: Feldmann, Michael. Monotonic Searchability for Distributed Sorted Lists and De Bruijn Graphs. Universität Paderborn, 2015. short: M. Feldmann, Monotonic Searchability for Distributed Sorted Lists and De Bruijn Graphs, Universität Paderborn, 2015. date_created: 2017-10-17T12:41:46Z date_updated: 2022-01-06T06:57:45Z department: - _id: '79' language: - iso: eng project: - _id: '1' name: SFB 901 - _id: '5' name: SFB 901 - Subprojekt A1 - _id: '2' name: SFB 901 - Project Area A publisher: Universität Paderborn status: public supervisor: - first_name: Christian full_name: Scheideler, Christian id: '20792' last_name: Scheideler title: Monotonic Searchability for distributed sorted Lists and De Bruijn Graphs type: mastersthesis user_id: '477' year: '2015' ...