@techreport{ElsayedRizk2022,
  type      = {Working Paper},
  author    = {Elsayed, Karim and Rizk, Amr},
  title     = {Response Times in Time-to-Live Caching Hierarchies under Random Network Delays},
  series = {W{\"u}rzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)},
  journal   = {W{\"u}rzburg Workshop on Next-Generation Communication Networks (WueWoWas'22)},
  doi       = {10.25972/OPUS-28084},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-280843},
  pages     = {4},
  year      = {2022},
  abstract  = {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.},
  subject      = {Datennetz},
  language  = {en}
}