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David Jayatillake

@jayatillake.bsky.social
2.5K followers 612 following 942 posts

Writer @ davidsj.substack.com

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Reposted by David Jayatillake
Samuel Wong @samuelwong.bsky.social · 28/09/2025
How big should your data team be? Data teams are often oversized. A company of 200 people rarely needs 15+ data staff, usually 5% of org size is enough dataactionmentor.com/knowledge-ba...
dataactionmentor.com
How big should your data team be?
Founders and CEOs are wondering if their data function is bloated and if they should replace everyone with AI agents. Data Leaders are scrambling to defend why they need a 15-people data team in a 200...
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David Jayatillake @jayatillake.bsky.social · 29/07/2025
The amount you love someone is proportional to how often you Ghiblify their pictures.
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David Jayatillake @jayatillake.bsky.social · 01/07/2025
This week I look at agents. I think this is a new way to build where we don’t intentionally build code-based software. open.substack.com/pub/davidsj/...
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David Jayatillake @jayatillake.bsky.social · 30/06/2025
BERT and ERNIE! 😂 tracking.tldrnewsletter.com/CL0/https:%2...
tracking.tldrnewsletter.com
China's biggest public AI drop since DeepSeek, Baidu's open source Ernie, is about to hit the market
Chinese internet search giant Baidu will open source its Ernie gen AI large language model as soon as this week, with uncertain consequences for the market.
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David Jayatillake @jayatillake.bsky.social · 20/06/2025
I don't usually share photos of my family on social media for good reason, but I'm happy to share these ones!
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David Jayatillake @jayatillake.bsky.social · 06/06/2025
This post encapsulates how I feel about the current state of LLMs and doomers etc. Really great read: fly.io/blog/youre-a...
fly.io
My AI Skeptic Friends Are All Nuts
My smartest friends have bananas arguments about LLM coding.
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David Jayatillake @jayatillake.bsky.social · 06/06/2025
So when I've attended Snowflake summit before, I've usually written a blog post talking about the new features released, etc. Is someone going to do that this year, given I didn't go? 😊 #datasky #databs
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Anil Dash @anildash.com · 06/06/2025
It is possible to build machine learning systems which punch up instead of punching down.
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rmoff 🏃‍♂️🫖🥓 @rmoff.net · 05/06/2025
Got a cool story about something in the data engineering space? You should 💯 submit it as a talk to Current 2025 in New Orleans 😁 Do it! Now! CfP is open until 15th June. sessionize.com/current-2025... (Pro-tip: you only need an abstract at this point; writing the talk can be later 😅) #dataBS
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Mark Rittman @markrittman.bsky.social · 14/05/2025
At the London Data Practitioners Meetup with @pedramnavid.com @jayatillake.bsky.social @rittmananalytics.bsky.social and the London Dagster community
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David Jayatillake @jayatillake.bsky.social · 27/04/2025
Doctor’s orders 🫡
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David Jayatillake @jayatillake.bsky.social · 24/04/2025
I still think this is the biggest prize in AI. If Siri could actually do most things you do on a phone manually... 9to5mac.com/2025/04/22/s...
9to5mac.com
Siri’s new boss is already making big internal changes, per report - 9to5Mac
Siri’s new boss at Apple, Mike Rockwell, has reportedly wasted no time making big changes internally to the people building its assistant.
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David Jayatillake @jayatillake.bsky.social · 07/04/2025
Has anyone tried Llama 4 Maverick yet? How big a machine does it need to run locally? @simonwillison.net
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David Jayatillake @jayatillake.bsky.social · 02/04/2025
Looks like Nintendo became the best at console FPS.
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David Jayatillake @jayatillake.bsky.social · 24/03/2025
Once again, we've devised a derogatory name for something many of us are doing: "Vibe coding". Just like "Citizen Data Scientist", "Excel Data Analyst", and many other terms made to belittle by the supposed true artisans that came before. open.substack.com/pub/davidsj/...
open.substack.com
Vibe coder
Free like a puppy
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David Jayatillake @jayatillake.bsky.social · 14/03/2025
Clickbench says @duckdb.org is a great analytics database www.mooncake.dev/blog/clickbe...
mooncake.dev
Clickbench says Postgres is a great analytics database
Postgres is now top 10 in Clickbench with pg_mooncake.
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Reposted by David Jayatillake
arynndoesdata @arynn.bsky.social · 13/03/2025
I enabled the Cube AI API Slack App today, and I found a little treat 👀 Shout-out @mjirv.bsky.social and @jayatillake.bsky.social! If you're curious how easy this is to set up, check out: cube.dev/blog/make-yo...
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David Jayatillake @jayatillake.bsky.social · 04/03/2025
A couple of weeks ago I wrote a post about @pola.rs Cloud, and as coincidence would have it, DeepSeek then releases smallpond - a way to use @duckdb.org scaled out. It's pretty cool that an org has managed to build this, but is it the right way? davidsj.substack.com/p/many-ducks...
davidsj.substack.com
Many ducks, a big pond
Splitting the query
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David Jayatillake @jayatillake.bsky.social · 28/02/2025
🗣️ It was a real honour to speak at the very first Forward Data Conference in Paris last November, not to mention being introduced with a special piano verse just for me! 🎹 www.youtube.com/watch?v=QNQW...
youtube.com
AI on Data - snake oil or actually useful?
YouTube video by ForwardDataConf
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David Jayatillake @jayatillake.bsky.social · 26/02/2025
🏭 @tobikodata.com released a great new feature for SQLMesh last week called blueprinting. This is a feature that the dbt Labs community has been asking for for ages, and I’ve been wanting it too! open.substack.com/pub/davidsj/...
open.substack.com
Model Generation
A big feature release by SQLMesh
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David Jayatillake @jayatillake.bsky.social · 21/02/2025
🦆🦆🦆🦆 everywhere these days count.co/blog/announc...
count.co
Keep canvases moving with DuckDB on the server
We're super excited to announce the general availability of DuckDB on the server. This is our way of dramatically speeding up query speed while reducing computer cost for customers, helping you drive ...
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Tech on the Rocks @totrrocks.bsky.social · 20/02/2025
New episode: “Semantic Layers: The Missing Link Between AI and Data” with @jayatillake.bsky.social . We discuss how semantic layers bridge raw data and AI, achieving 100% accuracy for natural language queries, and what’s next for LLM-powered data pipelines. 🎧 techontherocks.show/14 🎧
techontherocks.show
Tech on the Rocks | Semantic Layers: The Missing Link Between AI and Data with David Jayatillake from Cube
In this episode, we chat with David Jayatillake, VP of AI at Cube, about semantic layers and their crucial role in making AI work reliably with data. We explore how semantic layers act as a bridge ...
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David Jayatillake @jayatillake.bsky.social · 20/02/2025
I've been interacting with r/dataengineering a bit recently, and I'm impressed by the size and engagement with the community there, but... Folks on #databs / #datasky seem much less likely to just mouth off without thinking or reading! I think I much prefer what we have here on BlueSky.
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arynndoesdata @arynn.bsky.social · 19/02/2025
Yep! And the new(ish) rust-based data engine also brought the ability to do multi-stage calculations. Bonus - "Tesseract" is an amazing name for a Cube engine 😀 cube.dev/blog/introdu...
cube.dev
Introducing Next-Generation Data Modeling Engine - Cube Blog
Previewing multi-stage calculations and performance leaps in the SQL Planner
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David Jayatillake @jayatillake.bsky.social · 18/02/2025
@tojyouso.bsky.social is this you? 😂
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David Jayatillake @jayatillake.bsky.social · 14/02/2025
pola.rs/posts/polars... This so reminds me of @motherduck.com and @duckdb.org, I guess the open source Polars is as good as it can be on one machine, and Polars Cloud is as good as it can be on many.
pola.rs
Polars Cloud; the distributed Cloud Architecture to run Polars anywhere
DataFrames for the new era
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Emily Moin @emilymoin.com · 14/02/2025
Cancer incidence rises when people live longer and have access to preventive care to diagnose it in time to treat it, and effective treatment increases cancer prevalence because we count the people who are still alive – this is a good thing, and I'm so fucking tired.
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David Jayatillake @jayatillake.bsky.social · 12/02/2025
🚀 Exciting times in the data transformation space! Recently, dbt Labs acquired SDF Labs, while @tobikodata.com acquired Quary (YC W24)—both promising Rust-based frameworks. So is SDF better than SQLMesh? No. open.substack.com/pub/davidsj/...
open.substack.com
SDF
Is it better than SQLMesh?
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arynndoesdata @arynn.bsky.social · 11/02/2025
One question that comes up for me on calls with companies- why can't I just build a semantic layer in my data platform? My brilliant coworker Morgan wrote a great post on why @cubedev.bsky.social is more beneficial as a semantic layer. Enjoy! cube.dev/blog/why-cub...
cube.dev
Why Cube Store is the Best Choice for Storing Pre-Aggregated Data - Cube Blog
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David Jayatillake @jayatillake.bsky.social · 11/02/2025
Announcing a new Substack! Focused on the theme of applying AI to analytics. I'm collaborating with Artyom Keydunov and Brian Bickell on this, and we'll bring you interesting, trending articles and news on our theme. aiforanalytics.substack.com/p/ai-for-ana...
aiforanalytics.substack.com
AI for Analytics #1
We are launching a newsletter and a podcast on how AI is transforming the data industry!
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Simon Späti 🏔️ @ssp.sh · 07/02/2025
Is there anything specific you want to know about OLAP cubes, especially newer open-source systems (e.g., ClickHouse, Druid, Starrocks, Pinot, Kylin, Doris, Cube, and more)? Which one is your favorite and why?
Git Stars comparison of popular open-source OLAP systems.
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Nico Ritschel @nicoritschel.com · 05/02/2025
DuckDB out here making me avoid other SQL dialects
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__Alex Monahan__ @a13x.bsky.social · 05/02/2025
DuckDB 1.2 brings serious performance to real-world queries! Selective joins, IN lists, Top N, partitioned parquet reads, and more get much faster! Performance is also incrementally improved ~across the board. Plus, the CSV reader improves (latin-1 for Windows folks!), SQL is friendlier, and more!
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David Jayatillake @jayatillake.bsky.social · 30/01/2025
@anthropic.com's Dario Amodei wrote a really thoughtful piece on the @deepseek.bsky.social situation and how it relates to overall macro end games with AI: darioamodei.com/on-deepseek-...
darioamodei.com
Dario Amodei — On DeepSeek and Export Controls
On DeepSeek and Export Controls
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Reposted by David Jayatillake
Felix M. Simon @felixsimon.bsky.social · 30/01/2025
It's weird how people see these two as mutually exclusive.
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David Jayatillake @jayatillake.bsky.social · 30/01/2025
They need to substantiate this. Otherwise, it sounds like sour 🍇. www.macrumors.com/2025/01/29/o...
macrumors.com
OpenAI Alleges DeepSeek Used Its Models for AI Training
OpenAI says it has uncovered evidence that Chinese AI startup DeepSeek used its proprietary models to train a competing open-source model,...
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John Scalzi @scalzi.com · 29/01/2025
OpenAI right now
Scene from The Princess Bride where Vizzinni says "You're trying to kidnap what I've rightfully stolen"
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David Jayatillake @jayatillake.bsky.social · 29/01/2025
I didn't realise there was another way... I either discover code or copy-paste and edit an existing solution... plus now AI. jimmyhmiller.github.io/discovery-co...
jimmyhmiller.github.io
Discovery Coding
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Reposted by David Jayatillake
Nico Ritschel @nicoritschel.com · 28/01/2025
If you're considering SQLMesh, @jayatillake.bsky.social has a great blog series from the end of last year that does in depth comparisons with DBT
davidsj.substack.com
sqlmesh init -t dbt
Backwards Compatibility
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David Jayatillake @jayatillake.bsky.social · 26/01/2025
Just had my first ever Wendy’s… not bad.
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Gergely Orosz @gergely.pragmaticengineer.com · 25/01/2025
Any company whose mission is to “to ensure that artificial general intelligence benefits all of humanity” would be ecstatic about a capable open source model like Deepseek released. Any company which has a mission of making money off closed-source models would be devastated tho.
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Adrian Brudaru @datateam.bsky.social · 23/01/2025
𝐇𝐨𝐰 𝐝𝐨 𝐲𝐨𝐮 𝐫𝐮𝐧 𝐝𝐥𝐭 𝐨𝐧 𝐀𝐖𝐒 𝐥𝐚𝐦𝐛𝐝𝐚? (tldr - 100x cheaper than Saas) Here are code templates: Github: github.com/codingcyclis... Blog: dlthub.com/blog/dlt-aws... We use GCP ourselves: dlthub.com/blog/dlt-seg... #databs
github.com
GitHub - codingcyclist/dlt-aws-lambda: Boilerplates for running DLT on AWS Lambda to create well-structured datasets from unstructured JSON without breaking a sweat
Boilerplates for running DLT on AWS Lambda to create well-structured datasets from unstructured JSON without breaking a sweat - codingcyclist/dlt-aws-lambda
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Simon Willison @simonwillison.net · 20/01/2025
DeepSeek released a whole family of inference-scaling / "reasoning" models today, including distilled variants based on Llama and Qwen Here are my notes on the new models, plus how I ran DeepSeek-R1-Distill-Llama-8B on my Mac using Ollama and LLM simonwillison.net/2025/Jan/20/...
simonwillison.net
DeepSeek-R1 and exploring DeepSeek-R1-Distill-Llama-8B
DeepSeek are the Chinese AI lab who dropped the best currently available open weights LLM on Christmas day, DeepSeek v3. That model was trained in part using their unreleased R1 …
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arynndoesdata @arynn.bsky.social · 17/01/2025
I really like working at Cube. Selling doesn't feel like selling when I get to talk about a tool I genuinely believe in. I can't believe I've been here less than 6 months. It feels both way longer and way shorter at the same time.
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David Jayatillake @jayatillake.bsky.social · 14/01/2025
Are the SDF founders/team on here?
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Tristan Handy @jthandy.bsky.social · 14/01/2025
Today, we’re announcing that dbt Labs has acquired SDF Labs. This a monumental day for dbt Labs and the entire dbt Community Thread on what that means 🧵 www.getdbt.com/blog/dbt-lab...
getdbt.com
dbt Labs acquires SDF Labs to accelerate the dbt developer experience | dbt Labs
New tech will significantly improve performance, enhance developer ergonomics, and bring rich new metadata to dbt.
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jasnonaz @jasnonaz.bsky.social · 14/01/2025
dbt Labs has acquired SDF Labs! Early reviews:
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Simon Späti 🏔️ @ssp.sh · 14/01/2025
SDF acquired by dbt. Didn't expect that. Not sure yet what to think. Blog post on blog.sdf.com/p/dbt-labs-h...
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David Jayatillake @jayatillake.bsky.social · 14/01/2025
Shill away You can shill away Shill three days a week - on LinkedIn That's what it's there for www.youtube.com/watch?v=2twL...
youtube.com
Gouge Away
YouTube video by Pixies - Topic
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