11,543 research outputs found
Impact of traffic mix on caching performance in a content-centric network
For a realistic traffic mix, we evaluate the hit rates attained in a
two-layer cache hierarchy designed to reduce Internet bandwidth requirements.
The model identifies four main types of content, web, file sharing, user
generated content and video on demand, distinguished in terms of their traffic
shares, their population and object sizes and their popularity distributions.
Results demonstrate that caching VoD in access routers offers a highly
favorable bandwidth memory tradeoff but that the other types of content would
likely be more efficiently handled in very large capacity storage devices in
the core. Evaluations are based on a simple approximation for LRU cache
performance that proves highly accurate in relevant configurations
CFTP: a caching FTP server
By analyzing the log files generated by the UK National Web Cache and by a number of origin FTP sites we provide evidence that an FTP proxy cache with knowledge of local (national) mirror sites could significantly reduce the amount of data that needs to be transferred across already overused networks. We then describe the design and implementation of CFTP, a caching FTP server, and report on its usage over the first 10 months of its deployment. Finally we discuss a number of ways in which the software could be further enhanced to improve both its efficiency and its usability
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