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Mark Brown

@markjbrown.com

960 followers 180 following 4K posts

I work on the Azure Cosmos DB team. ❤️ Distributed systems and databases. Helping developers design for infinite scale.

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Mark Brown @markjbrown.com · Apr 3

We built a new 1-day workshop on building Multi-Agent AI Apps.

Choose your own adventure and learn using LangGraph (python) or Semantic Kernel Agents (C#), or both.

All the code is here. Deploy/run full sample on main branch or use start branch for workshop.

github.com/AzureCosmosD...

GitHub - AzureCosmosDB/banking-multi-agent-workshop: A multi-agent sample and workshop for a retail banking scenario. Implemented in both C# using Semantic Kernel Agents and Python using LangGraph.

A multi-agent sample and workshop for a retail banking scenario. Implemented in both C# using Semantic Kernel Agents and Python using LangGraph. - GitHub - AzureCosmosDB/banking-multi-agent-worksh...

github.com

Reposted by Mark Brown

ExamineYourZipper 🌊🇺🇸💙🇺🇦🏴󠁧󠁢󠁷󠁬󠁳󠁿 @cidbarret85.bsky.social · Jun 24

I was today years old when I learned about this.
Why is nobody talking about this? 💊
This is great what he is doing, unlike most billionaires...
👍🏼 @mcuban.bsky.social

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Mark Brown @markjbrown.com · May 30

Not many people know that Microsoft Teams runs on Cosmos DB. Even fewer people know that they do TRILLIONS of transactions per day on Petabytes of data.

Learn how and why they use Cosmos DB.

devblogs.microsoft.com/cosmosdb/pow...

Powering Real-Time Messaging at Scale with Azure Cosmos DB - Azure Cosmos DB Blog

Discover how Microsoft’s unified messaging platform—powering Teams, Copilots, and ACS—leverages Azure Cosmos DB to deliver real-time communication at global scale. Learn about the key capabilities tha...

devblogs.microsoft.com

Mark Brown @markjbrown.com · May 6

If you're going to Microsoft BUILD come learn how to build multi-agent apps using Semantic Kernel in C# or LangGraph in Python at our hands-on-lab.

build.microsoft.com/en-US/sessio... There's another earlier delivery as well.

Learn to build multi-agent apps at our hands-on-lab at MS BUILD.

Reposted by Mark Brown

Azure Cosmos DB @azurecosmosdb.com · Apr 25

Ep. 104 of #AzureCosmosDB TV is here!
🎥 High-Scale Data Processing over 1000s of Devices with Expanso

See how Expanso + Azure Cosmos DB handle 50M records in under a minute with 1,000 edge nodes 🌍

📺 youtu.be/F2VMVjSxIHY
#EdgeComputing #DistributedSystems #NoSQL

High-Scale Data Processing over 1000s of Devices with Azure Cosmos DB and Expanso - Ep. 104

YouTube video by Azure Cosmos DB

youtu.be

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Mark Brown @markjbrown.com · Apr 15

Come check out the latest for @azurecosmosdb.com and see the exiting things customers are building at Cosmos DB Conf. Streaming live NOW!!!

www.youtube.com/watch?v=qXSu...

Azure Cosmos DB Conf 2025

YouTube video by Azure Cosmos DB

www.youtube.com

Mark Brown @markjbrown.com · Apr 7

I just updated our Samples Gallery with our latest great sample apps.

1. Multi-agent sample using OpenAI Swarm and Cosmos DB.

2. Full-day workshop building multi-agent apps using LangGraph in Python or Semantic Kernel Agents in C#.

azurecosmosdb.github.io/gallery/

Azure Cosmos DB Gallery

azurecosmosdb.github.io

Mark Brown @markjbrown.com · Apr 3

GitHub - AzureCosmosDB/banking-multi-agent-workshop: A multi-agent sample and workshop for a retail banking scenario. Implemented in both C# using Semantic Kernel Agents and Python using LangGraph.

A multi-agent sample and workshop for a retail banking scenario. Implemented in both C# using Semantic Kernel Agents and Python using LangGraph. - GitHub - AzureCosmosDB/banking-multi-agent-worksh...

github.com

Mark Brown @markjbrown.com · Mar 11

Time for a trip to BC 😀

#CoinStarPayForGas

Reposted by Mark Brown

Azure Cosmos DB @azurecosmosdb.com · Feb 24

New Video Series Alert! 🎬 Learn how to optimize performance, reduce costs, and scale efficiently with Azure Cosmos DB Design Patterns! 🚀 Watch now: aka.ms/AzureCosmosD... #AzureCosmosDB

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Mark Brown @markjbrown.com · Jan 29

Enjoying Tet with a Vietnamese salted cream iced coffee.

Great way to start the new year.

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Reposted by Mark Brown

Azure Cosmos DB @azurecosmosdb.com · Jan 29

📊 Ever wondered what embeddings are and how they power AI applications? 🤔
@markjbrown.com breaks it down in this short video, covering everything from LLMs to recommendation engines! 🚀
📺 Watch now: youtu.be/wF8xsL4w0_I
#AzureCosmosDB #AI

Azure Cosmos DB Shorts: What are embeddings?

YouTube video by Azure Cosmos DB

youtu.be

2 6

Reposted by Mark Brown

Adam Gordon Bell @adamgordonbell.bsky.social · Jan 27

Distributed databases talk with @markjbrown.com

We covered:
• Scaling OUT (adding nodes) vs. UP (bigger servers)
• Why partitioning is so important
• How session-level consistency lets you read your writes without the cost of full strong consistency

www.youtube.com/watch?v=Wv0q...

How do distributed databases actually work?

YouTube video by PulumiTV

www.youtube.com

1 3

Reposted by Mark Brown

James Cowling @jamescowling.dev · Jan 24

Got to sit down with Professor @andypavlo.bsky.social on the latest @convex.dev Databased podcast for his 2024 databases year in review!

www.youtube.com/watch?v=1B-M...

What You Missed in 2024 in the World of Databases, with Andy Pavlo

YouTube video by Convex

www.youtube.com

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Mark Brown @markjbrown.com · Jan 24

Let me know if you need quotes or anything. Will get you connected.

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Mark Brown @markjbrown.com · Jan 24

No different. This is our MongoDB vCore compatible API.

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Mark Brown @markjbrown.com · Jan 24

It's our MongoDB vCore API so a MDB compatible endpoint, but the underlying implementation is built on PostgreSQL.

We're really excited by this as well!!!

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Mark Brown @markjbrown.com · Jan 23

This is our MongoDB vCore engine. Not our Nosql one.

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Mark Brown @markjbrown.com · Jan 14

Lolz

Donna-Anita Black🏳️‍🌈 🇮🇪 @donnaablack.bsky.social · Jan 12

Gotta love ppl who work in book shops

Mark Brown @markjbrown.com · Jan 14

Customers have been asking us to make it easier to automatically generate embeddings on their data in @azurecosmosdb.com

So we created this: devblogs.microsoft.com/cosmosdb/emb...

This sample shows how to use a Cosmos DB Trigger & Output binding in Functions to do it automatically.

Cosmos DB Embeddings Generator Sample - Azure Cosmos DB Blog

Ever since our first preview announcement for vector indexing and support for DiskANN and then again when we announced the GA for these features, customers have been asking us to make it easier to gen...

devblogs.microsoft.com

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Reposted by Mark Brown

The Onion @theonion.com · Jan 11

Mark Zuckerberg Defends Decision To Fly Confederate Flag At Facebook Headquarters

MENLO PARK, CA—Claiming that the banner embodied the spirit of the company’s values, Mark Zuckerberg defended his controversial decision Friday to fly a Confederate flag at the Facebook headquarters. ...

theonion.com

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Mark Brown @markjbrown.com · Jan 10

Tailor made for his audience.

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Mark Brown @markjbrown.com · Jan 9

Looks like your DM's are closed. Please feel free to DM me. Mine are open. Would be happy to connect with you.

Thanks.

Mark Brown @markjbrown.com · Jan 9

Hi Igor. Would it be possible to get some more understanding with your experience Cosmos DB?

We've invested a lot over the years to make Cosmos a cost-efficient NoSQL database for any size workload, especially small and serverless use-cases.

I'd love to get more details. Will DM you. Thanks!

Mark Brown @markjbrown.com · Dec 19

Embeddings are at the heart of how an LLM works. But understanding how they work is hard.

To help, I created a simple Python Notebook that takes an array of words and plots them in a 3D graph to show how the compare in a multi-dimensional space.

Feel free to check out.
github.com/AzureCosmosD...

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Mark Brown @markjbrown.com · Dec 14

I do this for my directs. I feel the same way.