| Publisher | Stanford University | ||
|---|---|---|---|
| Format | 139.6KB PDF | Date added | 01 Jan 2007 |
| Topics | Network Design | ||
| Downloads | 58 | ||
This paper gives the first constant-approximations for a number of layered network design problems. It begins by modeling hierarchical caching, where caches are placed in layers and each layer satisfies a fixed percentage of the demand (bounded miss rates). The paper presents a constant approximation to the minimum total cost of placing the caches and routing demand through the layers. This model is extended to cover more general layered caching scenarios, giving a constant combinatorial approximation to the well studied multi-level facility location problem. This paper considers a facility location variant, the Load Balanced Facility Location problem in which every demand is served by a unique facility and each open facility must serve at least a certain amount of demand.
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