I'd like to add to this (as I have been working in a DWH context the last half year): I am very interested (just have not had the time yet) in the question of how SOA based integration can be usefully applied to an environment where data storage is so dominant that interfacing with other applications is primarily done through the ETL (extract-transform-load) processes and the DWH.
In a sense this is 'unidirectional' integration, as information just flows from the integrated systems to some consuming system. The DWH (and the DWH's physical model) become the central integration spot (with all the coupling consequences).
The question is not if that approach is good or not (since that is just the way things are and will be done) - the question is how SOA concepts can be usefully applied or how SOA ideas can be explained to people bound to such an environment?
Jan
>I'm looking for thoughts on possible integration/co-existence/
>conflict issues of SOA and ODS (Operational Data Store) concepts.
>
>An ODS as a centralized, up-to-date, hybrid OLAP/OLTP store for
>status data (without history) is appealing because it can be the
>point of consolidation for information spread throughout the company
>(e.g. for issues such as fraud detection, compliance issues etc.). On
>the other hand, it seems to violate the idea of loosely-coupled,
>independent services with managed dependencies -- after all, the
>central storage might be abused (on purpose or accidentally) for
>integration tasks.
>
>What do you think? Is an ODS something that you would avoid in an
>ideal SOA scenario? Or do you consider it a vital piece an any decent
>company's IT environment?
>
>Personally, I'm still undecided. I have a strong fear of creating a
>huge, monolithic, centralized bottleneck and maintenance issue, while
>on the other hand I can't seem to be able to find a good "pure SOA"
>alternative.
>
>Thanks,
>Stefan
>
>--
>Stefan Tilkov, http://www.innoq.com/blog/st/
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>Yahoo! Groups Links
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