Towards feasible implementations of low-latency multi-writer atomic registers

Chryssis Georgiou, Nicolas Nicolaou, Alexander C. Russell, Alexander A. Shvartsman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

This work explores implementations of multi-writer/multi-reader (MWMR) atomic registers in asynchronous, crash-prone, message-passing systems with the focus on low latency and computational feasibility. The efficiency of atomic read/write register implementations is traditionally measured in terms of the latency of read and write operations. To reduce operation latency researchers focused on the communication costs, expressed as the number of communication round-trips (or rounds), often ignoring the computation costs. In this paper we consider efficiency of a register implementation in terms of both communication and computation costs. As of this writing, algorithm SFW is the sole known MWMR algorithm that allows single round read and write operations. The algorithm uses collections of intersecting sets (quorums), and to enable single round operations, SFW relies on the evaluation of certain predicates. We formulate a new combinatorial problem that captures the computational burden of evaluating the predicates in algorithm SFW and we show that it is NP-Complete. To make the evaluation of the predicates feasible, we present a polynomial log-approximation algorithm for this problem and we show how to use it with algorithm SFW. Then we present a new algorithm, called CWFR, that allows fast operations independently of the underlying quorum system construction. The algorithm implements two-round writes and allows reads to complete in a single round. We conclude with experimental evaluations of our algorithms obtained from simulations in NS2.

Original languageEnglish (US)
Title of host publicationProceedings - 2011 IEEE International Symposium on Network Computing and Applications, NCA 2011
Pages75-82
Number of pages8
DOIs
StatePublished - 2011
Externally publishedYes
Event10th IEEE International Symposium on Network Computing and Applications, NCA 2011 - Cambridge, MA, United States
Duration: Aug 25 2011Aug 27 2011

Publication series

NameProceedings - 2011 IEEE International Symposium on Network Computing and Applications, NCA 2011

Conference

Conference10th IEEE International Symposium on Network Computing and Applications, NCA 2011
Country/TerritoryUnited States
CityCambridge, MA
Period8/25/118/27/11

Keywords

  • Approximation algorithms
  • Atomic memory
  • MWMR registers
  • NP-Complete

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications

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