Alberto Corrales Garcia

Introduction to Event Sourcing and CQRS The fundamental idea of Event Sourcing is ensuring that every change to the state of an application is captured in an event object, and that these event objects are themselves stored in the sequence they were applied for the same lifetime as the application state itself. (For more information about Event Sourcing I recommend this post written by Martin Fowler ). Based on my experience working with Event Sourcing, having the sequence of events allows you to perform awesome functionalities, like time travelling or replaying your events into multiple storage technologies. However, it can be tricky for some scenarios. To explain this better, I need to introduce Event Sourcing working together with Command Query Responsibility Segregation (CQRS). If you are not familiar with CQRS, the idea behind it is splitting commands (write operations) from queries (read operations), so they can work independently. (more info about CQRS in this post ). CQRS an...

Introduction  EventStoreDB (ESDB) is an industrial-strength database technology used as the central data store for event-sourced systems. It is available open-source to run locally on most platforms or as SaaS through Event Store Cloud. Currently their SaaS version is under development, so if you want to run it on your cloud, you will have to set it up. One option is docker, since ESDB is available as docker image on Docker Hub . However, as Greg Young explains in this issue , it might be not the best option when it comes to performance, due to the extra virtualization layer. For the same reason, we don't usually use docker images for other database engines like SQL Server, MongoDB, etc. Then, if you want to run ESDB on cloud, in particular AWS cloud, EC2 + EBS is the most reasonable option.  In this post, I would like to share how you can configure ESDB on EC2+EBS easily with Pulumi, which will allow you to automate this process following the best practices. Creating EC2 with...