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David Linthicum

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Top Stories by David Linthicum

What is unique about an SOA is that it's as much of a strategy as a set of technologies, and it's really more of a journey than a destination. Moreover, it's a notion that is dependent upon specific technologies or standards, such as Web services and interface technology, but really requires many different types of technologies and standards for a complete SOA. The types of technologies you employ are dependent upon your requirement. Let's be a bit clearer as to where user interfaces fit into this SOA mix by providing core reference architecture, or, the basics of SOA. Figure 1 provides a diagram of the SOA logical architecture, working from the most primitive to the most sophisticated, from the top to the bottom. Base Services At the lowest level you have base services, including legacy services, new services, and data services. Legacy services, such as existing mai... (more)

Building a SOA...

While the notion of SOA continues to emerge, those who are implementing SOAs today are faced with a variety of challenges, including the complexities of SOA, and the work involved with understanding their existing problem domain and requirements. Those who want to get SOA right the first time quickly understand the benefits of a sound architecture and a good set of SOA design approaches. However, the understanding of how you approach your SOA, and best practices around building a SOA, are clearly lacking. Those who are looking to gain the benefits of SOA are perplexed by the wid... (more)

Virtualization Experts in High Demand

Those with virtualization skills are in high demand right now.  That makes them just as difficult to retain as it is to find and hire them.  Indeed, as virtualization becomes more important to enterprise IT, those who understand VMWare, and other virtualization technology, as well as understand virtualization in general, are commanding top salaries and they are often recruited away from current employers. Personally, I'm getting a few calls a week from headhunters seeking design and operational virtualization talent, even in the downturn when data centers are shrinking.  At the... (more)

Cloud Computing at the IBM Impact Conference

Dave talks about his trip to IBM's Impact Conference, including coverage and commentary around IBM's cloud computing strategy. [[ This is a content summary only. Visit my website for full links, other content, and more! ]] ... (more)

Semantic Mapping, Ontologies, and XML Standards

When dealing with application integration, as you know by now, we are dealing with much complexity. The notion of ontologies helps the application integration architect prepare generalizations that make the problem domain more understandable. In contrast to abstraction, generalization ignores many of the details and ends up with general ideas. Therefore, when generalizing, we start with a collection of types and analyze commonalities to generalize them. Clearly, semantic heterogeneity and divergence hinders the notion of generalization, and as commonalities of two entities are r... (more)