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检索条件"任意字段=Proceedings of the 2016 ACM Symposium on Principles of Distributed Computing"

共 1393 条记录，以下是121-130 订阅

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PROV-IO: An I/O-Centric Provenance Framework for Scientific Data on HPC Systems 22

PROV-IO: An I/O-Centric Provenance Framework for Scientific ...

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31st International symposium on High-Performance Parallel and distributed computing (HPDC)

作者： Han, Runzhou Byna, Suren Tang, Houjun Dong, Bin Zheng, Mai Iowa State Univ Ames IA 50011 USA Lawrence Berkeley Natl Lab Berkeley CA USA

ISBN: (纸本)9781450391993

Data provenance, or data lineage, describes the life cycle of data. In scientific workflows on HPC systems, scientists often seek diverse provenance (e.g., origins of data products, usage patterns of datasets). Unfortunately, existing provenance solutions cannot address the challenges due to their incompatible provenance models and/or system implementations. In this paper, we analyze three representative scientific workflows in collaboration with the domain scientists to identify concrete provenance needs. Based on the first-hand analysis, we propose a provenance framework called PROV-IO, which includes an I/O-centric provenance model for describing scientific data and the associated I/O operations and environments precisely. Moreover, we build a prototype of PROV-IO to enable end-to-end provenance support on real HPC systems with little manual effort. The PROV-IO framework provides flexibility in selecting various classes of provenance. Our experiments with realistic workflows show that PROV-IO can address the provenance needs of the domain scientists effectively with reasonable performance (e.g., less than 3.5% tracking overhead for most experiments). Moreover, PROV-IO outperforms a state-of-the-art system (i.e., ProvLake) in our experiments.

关键词： Data Provenance Lineage Scientific Data Workflows High Performance computing FAIR principles Explainability Trustworthiness

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On Interplanetary and Relativistic distributed computing 25

On Interplanetary and Relativistic Distributed Computing

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proceedings of the acm symposium on principles of distributed computing

作者： Siddhartha Visveswara Jayanti Department of Computer Science Dartmouth College Hanover New Hampshire USA

ISBN: (纸本)9798400718854

Interplanetary distributed systems, such as the Interplanetary Internet, and the Global Positioning System (GPS) are subject to the effects of Einstein's theory of relativity. In this paper, we study relativistic distributed systems, which are subject to the relativity of simultaneity. We formulate a unified computational model for relativistic and classical distributed systems and study the relationship between properties of distributed algorithms deployed on the two types of systems. Classical executions are totally ordered in time, whereas the steps of a relativistic execution are only partially ordered by the relation of relativistic causality. We relate these two physics-dependent execution types through a third—purely mathematical—notion of a computational execution, which partially orders steps by the relation of computational causality. We relate relativistic, classical, and computational executions of distributed algorithms through a central theorem, which states that the following are equivalent for any distributed algorithm A: (1) A satisfies a property P classically; (2) every relativistic execution of A satisfies P in the reference frame of every observer; and (3) every total ordering of every computational execution of A satisfies P. As a direct consequence, we prove the equivalence of the standard, relativistic, and computational formulations of linearizability. Our results show that a host of algorithms originally designed for classical distributed systems will behave consistently when deployed in relativistic, interplanetary distributed systems.

关键词： relativistic distributed computing

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Brief Announcement: distributed Graph Algorithms with Predictions 25

Brief Announcement: Distributed Graph Algorithms with Predic...

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proceedings of the acm symposium on principles of distributed computing

作者： Joan Boyar Faith Ellen Kim S. Larsen Department of Mathematics and Computer Science University of Southern Denmark Odense Denmark Department of Computer Science University of Toronto Toronto Ontario Canada

ISBN: (纸本)9798400718854

We initiate the study of distributed graph algorithms with predictions in synchronous message passing systems. Each node in the graph is given a prediction, which is some extra information about the problem instance that may be incorrect. The better the prediction, the fewer rounds the algorithm should perform. We present a framework for evaluating distributed graph algorithms with predictions and some methods for transforming existing algorithms without predictions to effectively use predictions. Our approach is illustrated using the Maximal Independent Set problem.

关键词： algorithms with predictions

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distributed Construction of Lightweight Spanners for Unit Ball Graphs 36

Distributed Construction of Lightweight Spanners for Unit Ba...

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36th International symposium on distributed computing, DISC 2022

作者： Eppstein, David Khodabandeh, Hadi Department of Computer Science University of California IrvineCA United States

ISBN: (纸本)9783959772556

Resolving an open question from 2006 [14], we prove the existence of light-weight bounded-degree spanners for unit ball graphs in the metrics of bounded doubling dimension, and we design a simple O(log∗ n)-round distributed algorithm in the LOCAL model of computation, that given a unit ball graph G with n vertices and a positive constant ϵ ∗ n) rounds in the LOCAL model, but has a O(log ∆) bound on its lightness, where ∆ is the ratio of the length of the longest edge to the length of the shortest edge in the unit ball graph. Next, we adjust our algorithm to work in the CONGEST model, without changing its round complexity, hence proposing the first spanner construction for unit ball graphs in the CONGEST model of computation. We further study the problem in the two dimensional Euclidean plane and we provide a construction with similar properties that has a constant average number of edge intersections per node. Lastly, we provide experimental results that confirm our theoretical bounds, and show an efficient performance from our distributed algorithm compared to the best known centralized construction. © David Eppstein and Hadi Khodabandeh.

关键词： Graph theory

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Stochastic Coordination in Heterogeneous Load Balancing Systems 21

Stochastic Coordination in Heterogeneous Load Balancing Syst...

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40th acm SIGACT-SIGOPS symposium on principles of distributed computing (PODC)

作者： Goren, Guy Vargaftik, Shay Moses, Yoram Technion Haifa Israel VMware Res Herzliyya Israel

ISBN: (纸本)9781450385480

Current-day data centers and high-volume cloud services employ a broad set of heterogeneous servers. In such settings, client requests typically arrive at multiple entry points, and dispatching them to servers is an urgent distributed systems problem. This paper presents an efficient solution to the load balancing problem in such systems that improves on and overcomes problems of previous solutions. The load balancing problem is formulated as a stochastic optimization problem, and an efficient algorithmic solution is obtained based on a subtle mathematical analysis of the problem. Finally, extensive evaluation of the solution on simulated data shows that it outperforms previous solutions. Moreover, the resulting dispatching policy can be computed very efficiently, making the solution practically viable.

关键词： distributed load balancing Heterogeneous load balancing Stochastically coordinated dispatching Parallel server model

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Local Constant Approximation for Dominating Set on Graphs Excluding Large Minors 25

Local Constant Approximation for Dominating Set on Graphs Ex...

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proceedings of the acm symposium on principles of distributed computing

作者： Marthe Bonamy Cyril Gavoille Timothe Picavet Alexandra Wesolek LaBRI University of Bordeaux CNRS Bordeaux France LaBRI University of Bordeaux Bordeaux France Technische Universität Berlin Berlin Germany

ISBN: (纸本)9798400718854

We show that graphs excluding K2,t as a minor admit a f(t)-round 50-approximation deterministic distributed algorithm for Minimum Dominating Set. The result extends to Minimum Vertex Cover. Though fast and approximate distributed algorithms for such problems were already known for H-minor-free graphs, all of them have an approximation ratio depending on the size of H. To the best of our knowledge, this is the first example of a large non-trivial excluded minor leading to fast and constant-approximation distributed algorithms, where the ratio is independent of the size of H. A new key ingredient in the analysis of these distributed algorithms is the use of asymptotic dimension.

关键词： distributed algorithm

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Brief Announcement: What's Live? Understanding distributed Consensus 21

Brief Announcement: What's Live? Understanding Distributed C...

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40th acm SIGACT-SIGOPS symposium on principles of distributed computing (PODC)

作者： Chand, Saksham Liu, Yanhong A. SUNY Stony Brook Dept Comp Sci Stony Brook NY 11794 USA Apple Inc Cupertino CA 95014 USA

ISBN: (纸本)9781450385480

distributed consensus algorithms such as Paxos have been studied extensively. Many different liveness properties and assumptions have been stated for them, but there are no systematic comparisons for better understanding of these properties. This paper systematically studies and compares different liveness properties stated for over 30 prominent consensus algorithms and variants. We introduced a precise high-level language and formally specified these properties in the language. We then create a hierarchy of liveness properties combining two hierarchies of the assumptions used and a hierarchy of the assertions made, and compare the strengths and weaknesses of algorithms that ensure these properties. Our formal specifications and systematic comparisons led to the discovery of a range of problems in various stated liveness properties. We also developed TLA+ specifications of these liveness properties, and we used model checking of execution steps to illustrate liveness patterns for Paxos.

关键词： distributed consensus liveness

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Optimal distributed Replacement Paths 25

Optimal Distributed Replacement Paths

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proceedings of the acm symposium on principles of distributed computing

作者： Yi-Jun Chang Yanyu Chen Dipan Dey Gopinath Mishra Hung Thuan Nguyen Bryce Sanchez National University of Singapore Singapore Singapore Tata Institute of Fundamental Research Mumbai India

ISBN: (纸本)9798400718854

We study the replacement paths problem in the CONGEST model of distributed computing. Given an s-t shortest path P, the goal is to compute, for every edge e in P, the shortest-path distance from s to t avoiding e. For unweighted directed graphs, we establish the tight randomized round complexity bound for this problem as [EQUATION] by showing matching upper and lower bounds. Our upper bound extends to (1 + ϵ)-approximation for weighted directed graphs. Our lower bound applies even to the second simple shortest path problem, which asks only for the smallest replacement path length. These results improve upon the very recent work of Manoharan and Ramachandran (SIROCCO 2024), who showed a lower bound of [EQUATION] and an upper bound of [EQUATION], where hst is the number of hops in the given s-t shortest path P.

关键词： CONGEST

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Brief Announcement: Towards Energy-Efficient distributed Agreement 25

Brief Announcement: Towards Energy-Efficient Distributed Agr...

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proceedings of the acm symposium on principles of distributed computing

作者： Hugo Mirault Peter Robinson School of Computer and Cyber Sciences Augusta University Augusta GA USA

ISBN: (纸本)9798400718854

We study fault-tolerant consensus in a variant of the synchronous message passing model, where, in each round, every node can choose to be awake or asleep. This is known as the sleeping model (Chatterjee, Gmyr, Pandurangan PODC 2020) and defines the awake complexity (also called energy complexity), which measures the maximum number of rounds that any node is awake throughout the execution. Only awake nodes can send and receive messages in a given round and all messages sent to sleeping nodes are lost. We present new deterministic consensus algorithms that tolerate up to f < n crash failures, where n is the number of nodes. Our algorithms match the optimal time complexity lower bound of f + 1 rounds. For multi-value consensus, where the input values are chosen from some possibly large set, we achieve an energy complexity of [EQUATION] rounds, whereas for binary consensus, we show that [EQUATION] rounds are possible.

关键词： distributed computing

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distributed Freeze Tag: a sustainable solution to discover and wake-up a robot swarm 25

Distributed Freeze Tag: a sustainable solution to discover a...

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proceedings of the acm symposium on principles of distributed computing

作者： Cyril Gavoille Nicolas Hanusse Gabriel Le Bouder Taïssir Marcé LaBRI Université de Bordeaux CNRS Bordeaux France

ISBN: (纸本)9798400718854

The Freeze-Tag Problem consists in waking up a swarm of robots starting with one initially awake robot. While there exists a wide literature on the centralized setting, where the locations of the robots are known in advance, we focus on the distributed version where the locations of the robots, P, are unknown, and where awake robots only detect other robots up to distance 1. Assuming that moving at distance δ takes a time δ, we show that waking up the whole swarm takes O(ρ + ℓ2 log(ρ/ℓ)), where ρ is the largest distance from the initial robot to any point of P, and ℓ is the connectivity threshold of P. Moreover, the result is complemented by a matching lower bound. We also provide other distributed algorithms, complemented with lower bounds, whenever each robot has a bounded amount of energy.

关键词： mobile agents

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