Event Sourcing · Software Development

Connection pending send bytes is too large (EventStore error)

This short note is about dealing with “Connection pending send bytes is too large” error while using a Catch-up subscription and connecting to an EventStore database. That error message can appear in the logs when the server drops a client connection. The reason why that happen is most likely that the server is sending too… Continue reading Connection pending send bytes is too large (EventStore error)

Event Sourcing · Software Architecture

Kafka vs Event Store on scaling processing in a messaging architecture

This post is a condensed excerpt that I use for a tech talk about scaling distributed systems. Kafka is a message broker and Event Store is a database for stream of events. The roles of these tools has been extended and not always with good results. One can be a good simple ingestion tool while… Continue reading Kafka vs Event Store on scaling processing in a messaging architecture

CQRS · Domain Driven Design · Event Sourcing · Software Architecture

Distributed Architecture: 3 Steps

Here is my view implementing business requirements with DDD, Event Sourcing and CQRS. Ingestion Processing CQRS and Data Distribution Applying the same 3 steps for each new requirements let improves time after time the mechanics of each small bubble while it is living in the aquarium of an Event Driven ecosystem along with bigger legacy… Continue reading Distributed Architecture: 3 Steps

Domain Driven Design · Event Sourcing · Software Architecture

Distributed Architecture 02: The Processing

In the ingestion phase data went through the front door to enter our domain. In the domain area we want to process the data in case they mean something for our components, ignore them if not relevant or raise exception if the data are relevant but something is not right. In the previous phase, the… Continue reading Distributed Architecture 02: The Processing

Domain Driven Design · Event Sourcing · Software Architecture

Distributed Architecture 01: The Ingestion

neurons are cells that are specialised to pass signals to individual target cells, and synapses are the means by which they do so Introduction Clients need results… synchronously Scale the ingestion channel Using Single or Multiple Input Streams Discover unstructured data Introduction A Distributed Software Architecture is formed by several parts that communicate with each… Continue reading Distributed Architecture 01: The Ingestion

Event Sourcing · Software Development

Cross DataCenter replication with EventStore

Note: Replication across clusters and nodes is available with Linker  After almost 4 month after I joined the EventStore team I’m going to present my first big egg: GeoReplica. This feature has been in the air for a while and it was referred as Multi Master replication. The GeoReplica is distributed as a fully supported… Continue reading Cross DataCenter replication with EventStore

Event Sourcing · Software Development

Set up an EventStore cluster on Kubernetes

[EDIT] The new official Event Store Helm Chart is now available [EDIT-EDIT] Unfortunately the EventStore team was not willing to support an official Helm Chart and they discontinued it with a bit of non-sense around the need of a data operator. Having a data operator for Kubernetes it’s a good idea as an addition in… Continue reading Set up an EventStore cluster on Kubernetes