HeartattacK

This is just one way of doing it. For certain scenarios, you would want persisted projection data. But even without that, there are many ways of having different nodes have a subset of the projection data in memory. When starting up, they would take a hit and take longer to start up, but when started, would act pretty much like any disk backed memory store. Another option is to persist the in memory set periodically to disk. When starting up, the node would read in the persisted set into memory and play back subsequent events (and not all from the beginning of time). There are a lot of other options - you could write books on this topic. However, this a sub-90 minute talk and it's not really possible to cover everything in that limited time.

@Martin, @Olmo:

Thanks for the tips...a generic lift1 will no doubt clean it up further and help link the concept. Will do so in the future.

@Olmo:

I was more putting forward the idea of computation expressions. In the c# part, this focused on binding Action<T> with a wrapper and it did so by taking in Action<T> and returning an Action<T>. While not explicitly following how monads are commonly explained, this does enable us to put some real world use cases of the concept to use (i.e. achieving composability, aspect orientation etc. without magical frameworks that do IL weaving). 

Thanks for the tip Probably positioning of the desktop mic needs changing...and there I was thinking of getting a mechanical keyboard

@Chan319: Could it be a streaming problem? Have you tried downloading the file (perhaps the High-WMV)? Is there no audio or is it crackling or of low volume for you? 

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