From: SAViNE: social network analysis - inspired content delivery network deployment and experimentation
Mapping cost | The cost of mapping a CDN on the testbed |
equals the amount of required bandwidth | |
for all content distribution substrate paths | |
as defined by the surrogate placement | |
solution augmented by the computing | |
resources allocated to each surrogate node. | |
CDN deployment cost | The overall cost of deploying a CDN is based |
on the adopted cost models (retrieval, update, | |
storage[9]). The cost is essentially comprised | |
by (i) the cost for storing the content at the | |
selected sites (ii) the access cost of CDN | |
end users within the area of service (iii) | |
the cost of updating the content at the | |
transit/surrogate servers | |
Number of surrogate | The number of nodes that are selected by |
servers | the placement algorithm to host a |
surrogate server. | |
Path length | The average number of hops between |
CDN end users and the origin server in a | |
particular CDN solution. | |
Shortest path | Shortest path betweenness centrality for a |
betweenness centrality | particular CDN solution is defined as the |
average of individual SPBCs of the selected | |
surrogates comprising the final CDN solution. |