Slow Event Sourcing reprojections? Just make them faster!

I don't have to tell anybody how awesome Event Sourcing is as an architecture style. But those that have been using it in production must have experienced the pains of keeping the upgrades fast enough, especially if you use a more traditional relational database like SQL Server. I've once heard somebody say: "If it's slow, make it faster", but rebuilding a big projection is simply a very expensive operations and involves a lot of network traffic between the application and the database servers.

Over the years since we adopted Event Sourcing, we've been experimenting a lot and have implemented various improvements to make those reprojections faster. And we haven't stopped. We're already working on some new ideas lately. So in this session, I'd like to share those techiques, their pros and cons and how we implemented them on a more detailed level.

Dennis Doomen

Hands-on architect in the .NET space with 26 years of experience on an everlasting quest for knowledge to build the right software the right way at the right time

The Hague, The Netherlands

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