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Summary: The Competitiveness of OnLine Assignments \Lambda
Yossi Azar y
Computer Science Department
TelAviv University
TelAviv 69978, Israel
Joseph (Seffi) Naor z
Computer Science Department
Technion
Haifa 32000, Israel
Raphael Rom
Sun Microsystems
Mountain View
CA 940431100
Abstract
Consider the online problem where a number of servers are ready to provide service
to a set of customers. Each customer's job can be handled by any of a subset of the
servers. Customers arrive onebyone and the problem is to assign each customer to an
appropriate server in a manner that will balance the load on the servers. This problem
can be modeled in a natural way by a bipartite graph where the vertices of one side
(customers) appear one at a time and the vertices of the other side (servers) are known
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