System Reliability requires Message Durability (immature WCF)

re: System Reliability requires Message Durability (immature WCF)

Dave Martinak — Thu, 31 May 2007 05:18:37 GMT

Is this where Biztalk "R2" WCF support is taking us?

re: System Reliability requires Message Durability (immature WCF)

NickMalik — Thu, 31 May 2007 09:29:49 GMT

BTS is the intermediary, not the endpoint. Durability needs to exist in the endpoint in order to insure that you don't change one weakness for two.

re: System Reliability requires Message Durability (immature WCF)

Udi Dahan - The Software Simplist — Wed, 06 Jun 2007 16:24:39 GMT

One-way messaging is the basis of scalability. Anything else you need beyond that can be implemented with one-way messaging and some state management.

Also, if you don't let the application dictate to where it wants to send the message, you've opened the door to routable and intermediable messages. Specifically, the use of publish/subscribe (which I've written extensively about here: http://udidahan.weblogs.us/category/pub-sub/) makes a lot of this possible. The reason we don't have a good pub/sub technology from Microsoft is really beyond me.

For me, durability just ends up being, at the application level, an attribute I put on a message. The responsibility of "making it so" gets delegated to the infrastructure (like you mentioned before, a mixture of technology and code these days).

I've also found these issues lead me to multi-process/multi-endpoint solutions even on a single server in order to handle higher-latency, more durable, and transactional messages beside lower-latency ones.

Divide and conquer. Don't be ruled by technology.

Keep these posts coming. Even though I can hardly keep up :)

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