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In this paper we present a hybrid performance model for modeling differentiated service of multi-tier web applications with per-tier concurrency limits, cross-tier interactions, as well as a work-conserving resource allocation model. The service dependencies between multiple tiers are captured first using a layered queueing model. We then show how to model(More)
The need for service differentiation in Internet services has motivated interest in controlling multi-tier web applications. This paper describes a tier-to-tier (T2T) management architecture that supports decentralized actuator management in multi-tier systems, and a testbed implementation of this architecture using commercial software products. Based on(More)
Traditional desktop delivery model is based on a large number of distributed PCs executing operating system and desktop applications. Managing traditional desktop environments is incredibly challenging and costly. Tasks like installations, configuration changes, security measures require time-consuming procedures and dedicated deskside support. Also these(More)
In business to business electronic commerce, the terms and conditions describing the electronic interaction between businesses can be expressed as an electronic contract or trading-partner agreement (TPA) from which configuration information and code which embodies the terms and conditions can be generated automatically. This paper first discusses issues(More)
The emergent IT clouds as the future of datacenters enable considerable opportunities for the services creation, deployment, management and usability. Users all over the world, from individuals to businesses have been taking advantage of the new cloud services automation and scalability benefits. However, the services creation and business support are still(More)
While IT management services represent a mature subject in the IT business arena, the emerging cloud generation of management services require critical enhancements to the current processes and technologies in order to deliver IT management remotely with rapid on-boarding and minimal labor involvement from experts, to be affordable and scale up to the(More)