MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Libraries
  • MIT Theses
  • Graduate Theses
  • View Item
  • DSpace@MIT Home
  • MIT Libraries
  • MIT Theses
  • Graduate Theses
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Analysis of Encoding Schemes for String Indexing

Author(s)
Yang, Adela
Thumbnail
DownloadThesis PDF (770.5Kb)
Advisor
Kraska, Tim
Terms of use
In Copyright - Educational Use Permitted Copyright MIT http://rightsstatements.org/page/InC-EDU/1.0/
Metadata
Show full item record
Abstract
Lookup of strings into in-memory database indexes is a problem with different considerations from those using integer keys. With their variable sizes, efficiently inserting strings into indexes should account for properties specific to strings. We investigate learning alternate schemes for encoding and inserting strings into index structures such as the adaptive radix tree (ART) and their impact on memory and lookup performance. In this thesis, we examine three different properties of string datasets and perform three experiments aimed at taking advantage of these properties. While using a character frequency based encoding was successful in increasing throughput on a theoretical read-heavy workload, it did not preserve lexicographical order and is unlikely to be useful in most workloads. Meanwhile, the experiments that did preserve lexicographical order were unsuccessful in demonstrating space or throughput improvements. We suggest improvements on these approaches for further experimentation.
Date issued
2021-06
URI
https://hdl.handle.net/1721.1/139178
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Publisher
Massachusetts Institute of Technology

Collections
  • Graduate Theses

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.