On the power of false negative awareness in indicator-based caching systems

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Distributed caching systems such as content distribution networks often advertise their content via lightweight approximate indicators (e.g., Bloom filters) to efficiently inform clients where each datum is likely cached. While false-positive indications are necessary and well understood, most existing works assume no false-negative indications. Our work illustrates practical scenarios where false-negatives are unavoidable and ignoring them has a significant impact on system performance. Specifically, we focus on false-negatives induced by indicator staleness, which arises whenever the system advertises the indicator only periodically, rather than immediately reporting every change in the cache. Such scenarios naturally occur, e.g., in bandwidth-constraint environments or when latency impedes each client's ability to obtain an updated indicator. Our work introduces novel false-negative aware access policies that continuously estimate the false-negative ratio and sometimes access caches despite negative indications. We present optimal policies for homogeneous settings and provide approximation guarantees for our algorithms in heterogeneous environments. We further perform an extensive simulation study with multiple real system traces. We show that our false-negative aware algorithms incur a significantly lower access cost than existing approaches or match the cost of these approaches while requiring an order of magnitude fewer resources (e.g., caching capacity or bandwidth).

Original languageEnglish
Title of host publicationProceedings - 2021 IEEE 41st International Conference on Distributed Computing Systems, ICDCS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages46-56
Number of pages11
ISBN (Electronic)9781665445139
DOIs
StatePublished - 1 Jul 2021
Event41st IEEE International Conference on Distributed Computing Systems, ICDCS 2021 - Virtual, Washington, United States
Duration: 7 Jul 202110 Jul 2021

Publication series

NameProceedings - International Conference on Distributed Computing Systems
Volume2021-July

Conference

Conference41st IEEE International Conference on Distributed Computing Systems, ICDCS 2021
Country/TerritoryUnited States
CityVirtual, Washington
Period7/07/2110/07/21

Keywords

  • Access strategies
  • Cache sharing
  • Cooperative caching
  • Information centric networks
  • Network caching
  • Replica selection
  • Uncertainty

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

Fingerprint

Dive into the research topics of 'On the power of false negative awareness in indicator-based caching systems'. Together they form a unique fingerprint.

Cite this