A constant-factor approximation algorithm for unsplittable flow on paths

P Bonsma, J Schulz, A Wiese - SIAM journal on computing, 2014 - SIAM
In the unsplittable flow problem on a path, we are given a capacitated path P and n tasks,
each task having a demand, a profit, and start and end vertices. The goal is to compute a …

Caching is hard—even in the fault model

M Chrobak, GJ Woeginger, K Makino, H Xu - Algorithmica, 2012 - Springer
We prove strong NP-completeness for the four variants of caching with multi-size pages.
These four variants are obtained by choosing either the fault cost or the bit cost model, and …

Unsplittable flow in paths and trees and column-restricted packing integer programs

C Chekuri, A Ene, N Korula - … , RANDOM 2009, Berkeley, CA, USA, August …, 2009 - Springer
We consider the unsplittable flow problem (UFP) and the closely related column-restricted
packing integer programs (CPIPs). In UFP we are given an edge-capacitated graph G=(V, E) …

A mazing 2+ ε approximation for unsplittable flow on a path

A Anagnostopoulos, F Grandoni, S Leonardi… - ACM Transactions on …, 2018 - dl.acm.org
We study the problem of unsplittable flow on a path (UFP), which arises naturally in many
applications such as bandwidth allocation, job scheduling, and caching. Here we are given …

Optimal interval scheduling with a resource constraint

E Angelelli, N Bianchessi, C Filippi - Computers & operations research, 2014 - Elsevier
We consider a scheduling problem where n jobs have to be carried out by m parallel
identical machines. The attributes of a job j are a fixed start time sj, a fixed finish time fj, a …

New approximation schemes for unsplittable flow on a path

J Batra, N Garg, A Kumar, T Mömke, A Wiese - … of the twenty-sixth annual ACM …, 2014 - SIAM
We study the unsplittable flow on a path problem which has received a lot of attention in the
research community recently. Given is a path with capacities on its edges and a set of tasks …

Minimal cost server configuration for meeting time-varying resource demands in cloud centers

C Liu, K Li, K Li - IEEE Transactions on Parallel and Distributed …, 2018 - ieeexplore.ieee.org
We consider the minimal cost server configuration for meeting resource demands over
multiple time slots. Specifically, there are some heterogeneous servers. Each server is …

A (5/3+ ε)-approximation for unsplittable flow on a path: placing small tasks into boxes

F Grandoni, T Mömke, A Wiese, H Zhou - Proceedings of the 50th annual …, 2018 - dl.acm.org
In the unsplittable flow on a path problem (UFP) we are given a path with edge capacities
and a collection of tasks. Each task is characterized by a subpath, a profit, and a demand …

Resource allocation with time intervals

A Darmann, U Pferschy, J Schauer - Theoretical Computer Science, 2010 - Elsevier
We study a resource allocation problem where jobs have the following characteristic: each
job consumes some quantity of a bounded resource during a certain time interval and …

A PTAS for unsplittable flow on a path

F Grandoni, T Mömke, A Wiese - Proceedings of the 54th annual ACM …, 2022 - dl.acm.org
In the Unsplittable Flow on a Path problem (UFP) we are given a path with edge capacities,
and a set of tasks where each task is characterized by a subpath, a demand, and a weight …