TY - GEN

T1 - Veracity radius - Capturing the locality of distributed computations

AU - Birk, Yitzhak

AU - Keidar, Idit

AU - Liss, Liran

AU - Schuster, Assaf

AU - Wolff, Ran

PY - 2006

Y1 - 2006

N2 - This paper focuses on local computations of distributed aggregation problems on fixed graphs. We define a new metric on problem instances, Veracity Radius (VR), which captures the inherent possibility to compute them locally. We prove that VR yields a tight lower bound on output-stabilization time, i.e., the time until all nodes fix their outputs, as well as a lower bound on quiescence time. We present an efficient aggregation algorithm, I-LEAG, which reaches both output stabilization and quiescence within a time that is proportional to the VR of the problem instance, and is also efficient in terms of per-node communication and memory. We empirically show that the VR metric also effectively captures the performance of previously suggested efficient aggregation protocols, and that I-LEAG significantly outperforms these protocols in several respects.

AB - This paper focuses on local computations of distributed aggregation problems on fixed graphs. We define a new metric on problem instances, Veracity Radius (VR), which captures the inherent possibility to compute them locally. We prove that VR yields a tight lower bound on output-stabilization time, i.e., the time until all nodes fix their outputs, as well as a lower bound on quiescence time. We present an efficient aggregation algorithm, I-LEAG, which reaches both output stabilization and quiescence within a time that is proportional to the VR of the problem instance, and is also efficient in terms of per-node communication and memory. We empirically show that the VR metric also effectively captures the performance of previously suggested efficient aggregation protocols, and that I-LEAG significantly outperforms these protocols in several respects.

KW - Aggregation

KW - Locality

UR - http://www.scopus.com/inward/record.url?scp=33748676843&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:33748676843

SN - 1595933840

SN - 9781595933843

T3 - Proceedings of the Annual ACM Symposium on Principles of Distributed Computing

SP - 102

EP - 111

BT - Proceedings of the 25th Annual ACM Symposium on Principles of Distributed Computing 2006

T2 - 25th Annual ACM Symposium on Principles of Distributed Computing 2006

Y2 - 23 July 2006 through 26 July 2006

ER -