And yes, the difference is indeed between a service that may be centralized and important in a given SOA, and the architectural requirement for such a service.
Thanks, Eric --- Gregg Wonderly <[EMAIL PROTECTED]> wrote: > Jan Algermissen wrote: > > [1] Though I wonder if that is really possible, > since AFAIK > > distributed systems usually need some sort of > (eventually) > > centralized name lookup service and from a > manageability POV, there > > should be some centralized form of 'credentials' > management (e.g. > > NIS, LDAP) so they need not be spread across all > nodes of a given > > system. > > I think there is a big difference between a "central > service" and a "centrally > important service". I keep sensing a lot of CORBA > ORB oriented references in > all of this SOA vs Object Systems. I think there is > an attempt at saying, > indirectly that SOA's shouldn't contain an ORB > because that was a bad experience > for some (if not many) who didn't know how to build > a distributed system. > > But, I can only guess at these things, since I'm not > them. > > Sure are some very interesting and seemingly oddly > focused comments about what > SOA really is floating around. > > An SOA to me is an architecture where you have the > freedom to add a separate > service to solve a problem just as easily as you > might add a new function/method > to an existing API. It's the software system that > enables you to do this. If > your system architecture is simply constructed as a > composite, single process > system, where no parts can be separated to a second > system to scale CPU or > distributed geographically to manage long distance > latency or connectivity > failures, it's not SOA. > > If your software development platform includes APIs > that take the 8 fallacies of > distributed computing into account and support a > software architecture and > associated APIs that encourage remoting of > operations at whatever granularity > make sense, then you have the ability to create an > SOA with that platform. > > But, you still have to do the right things to make > SOA a reality. > > Gregg Wonderly > > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/service-orientated-architecture/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
