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Response Times in Time-to-Live Caching Hierarchies under Random Network Delays

Please always quote using this URN: urn:nbn:de:bvb:20-opus-280843
  • Time-to-Live (TTL) caches decouple the occupancy of objects in cache through object-specific validity timers. Stateof- the art techniques provide exact methods for the calculation of object-specific hit probabilities given entire cache hierarchies with random inter-cache network delays. The system hit probability is a provider-centric metric as it relates to the origin offload, i.e., the decrease in the number of requests that are served by the content origin server. In this paper we consider a user-centric metric, i.e., the response time,Time-to-Live (TTL) caches decouple the occupancy of objects in cache through object-specific validity timers. Stateof- the art techniques provide exact methods for the calculation of object-specific hit probabilities given entire cache hierarchies with random inter-cache network delays. The system hit probability is a provider-centric metric as it relates to the origin offload, i.e., the decrease in the number of requests that are served by the content origin server. In this paper we consider a user-centric metric, i.e., the response time, which is shown to be structurally different from the system hit probability. Equipped with the state-of-theart exact modeling technique using Markov-arrival processes we derive expressions for the expected object response time and pave a way for its optimization under network delays.show moreshow less

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Metadaten
Author: Karim Elsayed, Amr Rizk
URN:urn:nbn:de:bvb:20-opus-280843
Document Type:Working Paper
Faculties:Fakultät für Mathematik und Informatik / Institut für Informatik
Language:English
Parent Title (English):Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)
Year of Completion:2022
Pagenumber:4
DOI:https://doi.org/10.25972/OPUS-28084
Dewey Decimal Classification:0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
GND Keyword:Datennetz
Tag:TTL
CCS-Classification:A. General Literature
Release Date:2022/08/19
Collections:Sammel- und Konferenzbände (Edited volumes and conference proceedings) / Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) / Arbeitspapiere (Working Paper)
Licence (German):License LogoCC BY-SA: Creative-Commons-Lizenz: Namensnennung, Weitergabe unter gleichen Bedingungen 4.0 International