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Using Application Specific Knowledge for Configuring Object Replicas

Lookup NU author(s): Professor Mark Little, Emeritus Professor Santosh Shrivastava



In distributed systems, object replication is used to improve the availability and performance of applications in the presence of failures. When determining the configuration of a replicated object (i.e., number and location of replicas), a number of often conflicting factors need to be considered, e.g., the availability and performance requirements of the object. However, application specific knowledge about the objects, such as any inter-dependencies, is typically not accounted for. In many applications this information can affect an object's availability. Distributed systems which support replication typically give users only basic control over the configuration of a replicated object, such as the number or location of individual replicas. Expressing application specific knowledge is not possible. We have designed and implemented a replication sub-system allowing applications to control these aspects of replication. This system allows the efficient replication of an arbitrary umber of objects with arbitrary inter-dependencies.

Publication metadata

Author(s): Little MC, Shrivastava SK

Publication type: Report

Publication status: Published

Series Title: Department of Computing Science Technical Report Series

Year: 1997

Pages: 12

Print publication date: 01/01/1997

Source Publication Date: 1997

Report Number: 579

Institution: Department of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne