TY  - RPRT
A1  - Elsayed, Karim
A1  - Rizk, Amr
T1  - Response Times in Time-to-Live Caching Hierarchies under Random Network Delays
T2  - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)
N2  - 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.
KW  - Datennetz
KW  - TTL
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280843
ER  -