Internet Operating Systems Project

Worldwide Computing Laboratory

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The Internet Operating System (IOS) is a distributed middleware framework that provides support for dynamic reconfiguration of large-scale distributed applications through opportunisticload balancing capabilities, resource-level profiling and application-level profiling. IOS has a modular nature that allows developers to create easily various reconfiguration policies. One key ingredient to application reconfiguration is the support for process migration. Applications should support process mobility to be able to benefit from IOS reconfiguration policies.


The goal of IOS middleware is to provide effective decentralized middleware-triggered dynamic reconfiguration strategies that enable application adaptation to the constantly changing behavior of large scale shared networks. To distributed application developers who often lack the time and expertise to handle complex performance tunings, IOS is a promising approach that combines both ease of use and high performance.


Applications wishing to interact with IOS need to have a flexible structure that synergizes easily with the dynamic nature of shared networks. They should exhibit a large degree of processing and/or data parallelism for efficient use of the system and scalability to a large number of resources. We assume that every application consists of distributed and migratable entities.

IOS reconfiguration mechanisms allow 1) analyzing profiled application communication patterns, 2) capturing the dynamics of the underlying physical resources, 3) and utilizing the profiled information to reconfigure application entities by changing their mappings to physical resources through migration. A key characteristic of IOS is that it adopts a decentralized strategy that avoids the use of any global knowledge to allow scalable reconfiguration.


Webmaster: Kaoutar El Maghraoui
Last updated: 06/24/06.