Datalust, the company behind Seq

Seq is the intelligent search, analysis, and alerting server built specifically for modern structured log data.

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News and announcements

Choosing the right log levels in development and production

Monday, 13 June 2022

The concept of log event "levels" is ubiquitous, appearing in practically every application logging library and language. We have an intuitive sense of what familiar levels like debug, warning, and error mean, but there's surprisingly little useful advice out there on how to use levels effectively.

2022.1.7647 maintenance release

Friday, 10 June 2022

We've just published a new patch for Seq 2022.1, including a number of bug fixes, and support for the ECR Public Gallery.

This release is the first to be published to the ECR Public Gallery, along with Docker Hub:

Screenshot of the datalust/seq repository README on the ECR Public Gallery.


What will Seq vNext look like on the inside?

Monday, 06 June 2022

An update from the Seq Engineering Team

Back in 2018 we wrote a new storage engine for Seq, optimized for the data types and access patterns that form the largest part of Seq's workload. Although the existing server was written in C#, we used the Rust programming language

New from Datalust

On .NET Live - Application logs and diagnostics with Serilog

Nicholas Blumhardt talks application diagnostics with Cecil Phillip in On .NET Live.

.NET Rocks! #1647 - Rust and C# with Ashley Mannix

Ashley Mannix talks with Carl and Richard about the combination of Rust and C# used at Datalust.

C# and Rust: Combining Managed and Unmanaged Code Without Sacrificing Safety, NDC Oslo 2019

Ashley Mannix explores the tools that .NET and Rust give us to design and build safe and robust hybrid applications.

Parsing in C# from First Principles, NDC Sydney 2018

Nicholas Blumhardt talks about Superpower, the library we built for parsing SQL queries in Seq, and the foundational principles behind it.

Open Source and the Future of Seq

Brendan Richards interviews Nicholas Blumhardt about Open Source, Rust, Seq, Serilog, and more, in this AMA from NDC Sydney 2018.

Using Structured Logging for Production Insight

Microsoft's Damian Brady and Nicholas Blumhardt talk structured logging in this episode of The DevOps Lab.

.NET Rocks! #1466 - The Evolution of Serilog

Richard Campbell, Carl Franklin, and Nicholas Blumhardt talk all things logging, diagnostics, and monitoring in this .NET Rocks! episode recorded at NDC Oslo 2017.

Serilog: Instrumentation that Works for You, NDC Oslo 2017

Nicholas Blumhardt presents a complete walk-through of Serilog and modern structured logging at NDC Oslo 2017.