http://www.soamag.com The SOA Magazine is a monthly online publication provided by SOA Systems Inc. and Prentice Hall/PearsonPTR and is officially associated with the "Prentice Hall Service-Oriented Computing Series from Thomas Erl." SOA en-us Copyright 2006-2008, SOA Systems Inc. http://www.soamag.com/I14/0108-1.asp It has already been documented how SOA grids can be used to break the convention of stateless-only services for scalability and high availability (HA) by allowing stateful conversations to occur across multiple service requests, whether between disparate service boundaries or load-balanced groups of cloned service instances. In this article we will challenge traditional applications of MOM for achieving high levels of QoS when sharing data between services in an ESB. We will further compare and contrast a state-based, in-memory storage and notification model, and investigate the intelligent co-location of processing logic with or near its grid data in large payload scenarios. Finally, we will also explain when to substitute an SOA Grid for existing MOM technologies as driven by the question: "If you have an SOA grid that can reliably hold application state data and the necessary systems can access it, why continue to utilize conventional messaging?" SOA http://www.soamag.com/contributors/bio-dberry.asp#When:07.01.08 http://www.soamag.com/I10/0907-1.asp This article covers some of the key technologies that have emerged to address common SOA scalability requirements, such as mid-tier caching, load balancing, and high availability (HA) through service-level grid enablement in support of building out high performance SOA implementations. Collectively, these infrastructure components are referred to as the "SOA grid," providing enterprise IT professionals with much-needed support for enabling enforceable service-level agreements (SLAs) across entire service portfolios, including Web services, messaging, custom enterprise system applications, and legacy mainframes. (First published in The SOA Magazine Issue X, September 2007.) SOA http://www.soamag.com/contributors/bio-dberry.asp#When:03.09.07