@datalust_seq

The self-hosted search, analysis, and alerting server built for structured logs and traces. Also available at https://xitter.cf/t.co/cHujIy3UcY.

 Australia
datalust.co/seq
Joined March 2014
  • Tweets1.3K
  • Following430
  • Followers1.3K
201Media
bsky.app/profile/datalust.co
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Today's the day to catch Liam McLennan's epic Nokia Composer rebuild at #NDCMelbourne! ๐Ÿ˜Ž ndcmelbourne.com/slots/a-c-nโ€ฆ
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It's time to prepare for Seq Clustering! ๐Ÿ˜Ž All the details: blog.datalust.co/seq-clusterโ€ฆ

It's time to prepare for Seq Clustering!

Now in preview, Seq 2025.1 introduces high availability (HA), scale-out clustering in the Datacenter subscription tier.

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The Seq 2025.1.13956-pre build now at datalust.co/download, and on Docker Hub, is getting pretty close to an RC! If you have a non-mission-critical Seq install you can upgrade, now's a great time ๐Ÿ˜Š

Download Seq

Download the latest Seq release for Windows or Docker/Linux. A free Individual license is included; start a 30-day trial for shared environments.

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This is also the first Seq build that uses WebSockets to reduce latency when loading the Events screen ๐Ÿ˜Ž
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Not all proxies etc. support it, so look for this message in your browser's dev tools console to see whether yours infrastructure does:
Browser developer tools console showing the message "WebSocket connection established; streaming searches will be used"

ALT Browser developer tools console showing the message "WebSocket connection established; streaming searches will be used"

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Seq turns 11! ๐ŸŽ‰ Last year we were too busy programming to celebrate, so we're eating double servings of cake this year ๐Ÿ˜‡ A huge thank-you to our customers and friends for your continued support and trust, we couldn't have made it this far without you ๐Ÿ™
The Seq 11th birthday cake, in the shape of the Seq logo.

ALT The Seq 11th birthday cake, in the shape of the Seq logo.

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System Notifications! Seq 2025.1 includes a bunch of small manageability improvements like this one: blog.datalust.co/system-notiโ€ฆ

System Notifications

TL;DR: Seq 2025.1 supports connecting system notifications to an output app instance to proactively receive notifications.

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Faster (parallel, memoized) percentile computations are coming to Seq in 2025.1 ๐Ÿš€ blog.datalust.co/faster-percโ€ฆ
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Introducing the Seq Command Palette: blog.datalust.co/the-seq-comโ€ฆ With Seq 2025.1 Preview 2 just published, it's a great time to try this out and share your feedback ๐Ÿ™‚

Introducing the Seq Command Palette

TL;DR: ever wanted to reset the Seq events screen quickly, deselecting active signals, clearing the filter box, and resetting the date range? In Seq 2025.1, now in preview, that's Ctrl Space,...

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Inspired by @staff0rd ' work on LLM agents, I built an MCP server that lets LLMs interact with #SEQ. It's amazing to see LLMs analyse system behavior by speaking SEQ's language through MCP! Check out here: ahmadreza.com/2025/02/buildiโ€ฆ #LLM #MCP @nblumhardt @datalust_seq

Building a Model Context Protocol Server for SEQ Structured Logging

Large Language Models (LLMs) have become increasingly powerful, but their true potential emerges when they can interact with external tools and systems. As Mark Russinovich aptly described, giving...

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We've taken the wraps off the next big Seq update! Seq 2025.1 Preview 1 is ready for you to try ๐Ÿ˜Ž Details and links to binaries are over on the Seq blog: blog.datalust.co/seq-2025-1-โ€ฆ
The Seq 2025.1 Events screen, shown in the new Light theme.

ALT The Seq 2025.1 Events screen, shown in the new Light theme.

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Seq continues to amaze me. My personal dev machine tracking a crazy amount of messages from 50+ microservice workers. Thats 21,000 per MINUTE! @datalust_seq rocks.
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After much trial and error, I believe Serilog + Serilog Tracing [+ @datalust_seq] is the best logging/otel stack for most .NET shops. It's simple, effective, and what we use for PureBlazor and our clients.
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Our customers use Seq to debug distributed systems. Seq 2025.1 is itself a distributed system. We debug Seq with Seq... debugging inception! Here's our view of a Seq cluster running a query across two nodes ("antechinus" and "bettong" ๐Ÿ€), captured using an #OTel trace ๐Ÿ˜
A distributed trace, displayed in a Gantt/waterfall style, showing the progress of a distributed query running over two Seq nodes.

ALT A distributed trace, displayed in a Gantt/waterfall style, showing the progress of a distributed query running over two Seq nodes.

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When the guy from Brisbane and the guy from Melbourne sit next to each other in Adelaide, and manage to match their @datalust_seq socks. @larsklint You have to go home and change. #dddadelaide
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We love command palettes in the dev tools we use! In the upcoming Seq 2025.1 release we're adding a universal command palette with quick links to screens, context-specific actions, and (new) keyboard shortcuts. ๐Ÿ˜Ž
The Seq user interface, open on the Events screen, showing command palette overlay dialog. The dialog comprises a search box and a list of matching commands. The commands, for example "Add to Signal", are displayed with a short description of their action, and a keyboard shortcut sequence to activate them.

ALT The Seq user interface, open on the Events screen, showing command palette overlay dialog. The dialog comprises a search box and a list of matching commands. The commands, for example "Add to Signal", are displayed with a short description of their action, and a keyboard shortcut sequence to activate them.

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Heatmaps are coming to Seq in 2025.1 ๐ŸŽ‰ This new chart type is great for visualizing latency distributions, and is flexible enough to work with many other three-dimensional data sets. We're aiming to publish a preview late-2024; it's shaping up to be a huge release ๐Ÿ˜Ž
Screenshot of a heatmap chart. Cells are arranged in a grid, with time on the x (horizontal) axis and buckets on the y (vertical) axis. Each cell is colored according to the number of samples that fall within the corresponding bucket.

ALT Screenshot of a heatmap chart. Cells are arranged in a grid, with time on the x (horizontal) axis and buckets on the y (vertical) axis. Each cell is colored according to the number of samples that fall within the corresponding bucket.

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๐— ๐—ฎ๐˜€๐˜๐—ฒ๐—ฟ๐—ถ๐—ป๐—ด ๐——๐—ถ๐˜€๐˜๐—ฟ๐—ถ๐—ฏ๐˜‚๐˜๐—ฒ๐—ฑ ๐—ง๐—ฟ๐—ฎ๐—ฐ๐—ถ๐—ป๐—ด ๐˜„๐—ถ๐˜๐—ต ๐—ฆ๐—ฒ๐—ฟ๐—ถ๐—น๐—ผ๐—ด ๐—ฎ๐—ป๐—ฑ ๐—ฆ๐—ฒ๐—พ ๐—ถ๐—ป .๐—ก๐—˜๐—ง If you want to learn how to implement structured logging and distributed tracing in .NET applications, you're in the right place. There's one awesome tool that covers (almost) all your monitoring needs. It's called Seq, and it recently got distributed tracing. I'll show you how to correlate logs and traces across services, visualize request flows, and identify bottlenecks in distributed systems. Check it out here: youtu.be/F7nnCsIsVi0
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#cphdevfest was a blast! Hereโ€™s @liammclennan rocking the house on day four with How to Build a Database ๐Ÿ˜Ž
Liam McLennan on stage with attendees in foreground and overhead screen behind.

ALT Liam McLennan on stage with attendees in foreground and overhead screen behind.

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