Consider the following preemptive variant of the Load Balancing problem: There are m identical machines, and n jobs with processing times t1, t2, ..... tn respectively. Each machine can process at most one job at a time. Each job can run on more than one machines but must run on at most one machine at any time. Let T = max{max1<=j<=n tj ,1/ m Σ 1<=j<=n tj } : (a) Prove that the optimal makespan is at least T. (b) Give a linear-time algorithm which produces a preemptive schedule with makespan exactly T.
Consider the following preemptive variant of the Load Balancing problem: There are m identical machines, and n jobs with processing times t1, t2, ..... tn respectively. Each machine can process at most one job at a time. Each job can run on more than one machines but must run on at most one machine at any time. Let T = max{max1<=j<=n tj ,1/ m Σ 1<=j<=n tj } : (a) Prove that the optimal makespan is at least T. (b) Give a linear-time algorithm which produces a preemptive schedule with makespan exactly T.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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1. Consider the following preemptive variant of the Load Balancing problem: There are m identical machines, and n jobs with processing times t1, t2, ..... tn respectively. Each machine can process at most one job at a time. Each job can run on more than one machines but must run on at most one machine at any time. Let T = max{max1<=j<=n tj ,1/ m Σ 1<=j<=n tj } : (a) Prove that the optimal makespan is at least T. (b) Give a linear-time
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