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by Udi Dahan.
Original Post: Mission Critical SOA presentation
Feed Title: Udi Dahan - The Software Simplist
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Feed Description: I am a software simplist. I make this beast of architecting, analysing, designing, developing, testing, managing, deploying software systems simple.
This blog is about how I do it.
Monday (12/12) was the VS2005 Launch here in Israel. I gave a presentation on SOA (again) but with a different spin. First off, the context of the discussion was mission critical systems - systems that are characterized by two main axioms:
1. Data doesn't get lost. Ever.
2. Data is consistent. Always.
Of course, in any system there is some data we don't care about so much, but the rules remain.
In this context, we went through the tradeoffs in architectural styles - RPC and messaging.
Bottom line was: Messaging with its support for transactional sends, receives, in the context of transactional writes to databases is essential for complying with the 2 axioms. RPC with its advanced tooling is essential for developers to be able to build systems. Indigo (WCF) being the best of both worlds.
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On a different note, this was a no powerpoint presentation. At all. Not even a computer. I was hoping for a nice large whiteboard, but had to make do with 2 flipcharts. I think that it was a first for the 200 devarchitects in the crowd. It was a first for me too. I think that the results were excellent considering certain problems with the facilities (not enough chairs) and definitely would do it again - preferably with a whiteboard :)