A Fast and Memory-Efficient Trie Structure for Name-Based Packet Forwarding

Chavoosh Ghasemi, Hamed Yousefi, Kang G. Shin, Beichuan Zhang

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

14 Scopus citations

Abstract

Name lookup is an essential function, but a performance bottleneck in both today's and future network architectures. Variable-length and unbounded names rather than fixed-length addresses, as well as much larger and more dynamic forwarding tables call for a careful re-engineering of lookup structures for fast, memory-efficient, and scalable packet for-warding. We propose a novel data structure, called NameTrie, to store and index forwarding table entries efficiently and to support fast name lookups and updates. Its novelty lies in the optimized design and implementation of a character-trie structure. The nodes of NameTrie are stored compactly, improving cache efficiency and speeding up packet processing. Its edges are implemented using a hash table, facilitating fast name lookups and updates. A new scheme is used to encode control information without consuming additional memory. Running on conventional commodity hardware and using large-scale real-world name datasets, our implementation of NameTrie in software achieves 2.82∼3.56, 3.48∼3.72, and 2.73∼3.25 million name insertions, lookups, and removals per second, respectively, for various datasets while requiring a small memory footprint. We have conducted a comprehensive performance evaluation against the state-of-the-art of named data networking (NDN) as a typical use-case. It is shown to require at least 35% less memory and runs at least 3x faster for name table lookups and updates than two well-known trie-based schemes in NDN.

Original languageEnglish (US)
Title of host publicationProceedings - 26th IEEE International Conference on Network Protocols, ICNP 2018
PublisherIEEE Computer Society
Pages302-312
Number of pages11
ISBN (Electronic)9781538660430
DOIs
StatePublished - Nov 7 2018
Event26th IEEE International Conference on Network Protocols, ICNP 2018 - Cambridge, United Kingdom
Duration: Sep 24 2018Sep 27 2018

Publication series

NameProceedings - International Conference on Network Protocols, ICNP
Volume2018-September
ISSN (Print)1092-1648

Other

Other26th IEEE International Conference on Network Protocols, ICNP 2018
CountryUnited Kingdom
CityCambridge
Period9/24/189/27/18

Keywords

  • Lookup Structure
  • Named Data Networking
  • Trie

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Software

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