@joeksluis

software engineer @microsoft | databasemaxxing

 Washington, USA
github.com/JoeS51
Joined October 2025
  • Tweets695
  • Following894
  • Followers4.3K
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I was recommended this paper on Azure SQL Hyperscale, so I'll be reading it this week :) The database internals books I've read don't cover much on cloud-native database architecture, so I think it's a good idea to sprinkle in some papers here and there
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microsoft.com/en-us/research…
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Found this great article covering the history of distributed sqlite and the different approaches people have taken (Raft, streaming replication, CRDTs, etc) philipotoole.com/twelve-year…
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The pghacker MCP was released today (check out the Microsoft blog post), and it lets you explore Postgres's history including design decisions, past commits, and mailing list discussions I played around with it, and it seems super helpful. As an example, I asked about the history of Postgres WAL (which wasn't always a part of Postgres!):
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blog post: techcommunity.microsoft.com/… mcp: pghacker-mcp.dev/

Using PostgreSQL to reflect on its own history and code: introducing pghacker-mcp.dev | Microsoft...

By: Maxim Lukiyanov, PhD, Principal Software Engineer Every feature in PostgreSQL has a story. Before a line of code lands, it's proposed, debated, reviewed...

techcommunity.microsoft.com
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If you haven't been following the Postgres 19 reverts and why they're happening, this article provides some interesting context peter.eisentraut.org/blog/20…
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Built my first memory allocator in C This one is just a simple bump allocator, but I'm planning to build one a little more sophisticated this week
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I built a device that electrocutes me whenever I bite my nails looking back, this might be my greatest project (didn't break the habit though)
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Replying to @joeksluis
+1 to @joeksluis suggestion here, last year I attended few sessions live and few on demand. I must say it was too good if you care about performance and system programming. You shouldn’t miss it. All sessions are recorded and you can watch them later as well at your convenience from their YouTube channel. Here is the recording from last year sessions - youtube.com/playlist?list=PL…

P99 CONF 2025

P99 CONF is the premier technical conference for engineers obsessed with high-performance, low-latency applications. Join developers and architects from lead...

youtube.com
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If you're interested in systems programming, databases, performance, etc (guessing a lot of you are!), then check out p99 conf next week! The speaker lineup is stacked and there are a ton of interesting talks. A few I'm looking forward to: - Breaking SQLite’s Single-Writer Bottleneck - io_uring: past, present, future - Can Everything be an LSM?
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I realized the Turso and LSM talks overlap, but I'm pretty sure all the talks are recorded Link: p99conf.io/
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Two talks worth checking out if you’re in Seattle on 10/22 and interested in AI and workflows! 🤖 Kevin Burns will explore when to use LLMs, decision models, or deterministic code in production AI workflows, with examples from Cadence. 📱 Zi Zhu will share how he built OpenOx, an open-source mobile app that creates integrations on the fly and adapts to new services. Come hang out with the Seattle tech community and learn something new! Details + RSVP: luma.com/kz0zs6uz?tk=DTrIoT

Beyond the LLM: Building Reliable AI Systems · Luma

Talk 1: Choosing the Right Intelligence for AI Workflows Not every AI decision needs an LLM. Production systems often need to classify, score, route, generate,…

luma.com
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My article reading game is sadly lacking this month I added a page to my reading list to track my habits month by month
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for the curious library.joesluis.dev/stats
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I've had some experience with C a couple years ago, but I'd say Rust was my first real low level programming language Recently though, I've come back to C to better understand the Postgres source code, so it was pretty funny to come across this article about "C for Rust programmers". A really well-written article!
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bd103.dev/blog/2026-10-07-c-…
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I recently learned that Postgres can store indexes using hash tables instead of B-trees B-tree indexes are the default in Postgres and are generally more versatile (ex: hash indexes only support equality lookups), but it's still cool to know hash indexes are an option
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Solved Fly io’s second distributed systems challenge in C This one was about generating unique IDs during network partitions when nodes can't communicate with each other this also reminded me of Twitter's Snowflake IDs that I read about a while back. They solve a similar problem but support the creation of thousands of IDs per millisecond per worker
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links per usual: fly.io/dist-sys/2/ en.wikipedia.org/wiki/Snowfl…
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Solved Fly io's first distributed systems challenge in C the tutorial uses Go, but I figured this would be a good opportunity to get more comfortable with C
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the challenges if you're curious :) fly.io/dist-sys/1/

Challenge #1: Echo

Documentation and guides from the team at Fly.io.

fly.io
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