| 摘要 |
A method includes receiving demand information from edge routers, estimating an optimal request distribution based on the demand information using a bicriteria approximation algorithm, wherein initial programming states for the estimation are specified by (u, F, D, FS, DS, Fexp, Fimp), where u is a current node, F is a vector representing an available facility for large capacity, D is a vector representing an outsourced large client, FS is an amount of cache server capacity offered to small clients, DS is a total demand of outsourced small clients, Fexp is an index of a cache server being exported from a subtree, and Fimp is an index of another cache server of another subtree that is being utilized, and providing each of the edge routers with anycast route information for the cache servers.
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