Azure Cosmos DB

Fully managed NoSQL and relational database for modern app development with unlimited and instant scalability. Get news and updates from the team and community.

[Azure Cosmos DB @AzureCosmosDB]

Azure Cosmos DB Conf 2026 is for developers.

Hear from Corporate Vice President for Azure Databases at @Microsoft ,@ShireeshThota on what you can expect at Azure Cosmos DB Conf 2026—from global scale to agentic AI and real-world architectures.
April 28 9AM PT - Streaming Live on YouTube

Register free for updates: https://t.co/xoCZIJg51d

#AzureCosmosDB #AzureCosmosDBConf #AzureDocumentDB

[Azure Cosmos DB @AzureCosmosDB]

📺 https://t.co/cPHTFOWLfH

[Azure Cosmos DB @AzureCosmosDB]

Set up the Azure Cosmos DB inner-loop, then supercharge it with AI 🤖

Sajeetharan Sinnathurai (@AzureCosmosDB):
• VS Code extensions
• Local emulator
• Integration tests + CI
• Context files + prompts for better queries / SDK code

Link in thread 🧵

#AzureCosmosDB #AzureCosmosDBConf #DevTools

[Azure Cosmos DB @AzureCosmosDB]

If you work around developer tools, this is worth a look.

Sajeetharan Sinnathurai covers how MCP could make AI-assisted workflows feel less like stitching together prompts and more like using software that actually understands the job.

https://t.co/LKN7arhzlD

[Azure Cosmos DB @AzureCosmosDB]

Spring AI 2.0 is GA.

Theo van Kraay explores the new vendor-maintained Azure Cosmos DB modules for vector search, persistent chat memory, RAG, and multi-agent Java applications.

https://t.co/IXoTo7pbMJ

#AzureCosmosDB #SpringAI

[Azure Cosmos DB @AzureCosmosDB]

AI and agentic workloads can generate a lot of database activity—and unnecessary cost.

These 7 practical tips show how to reduce Azure Cosmos DB costs through better partitioning, query design, indexing, throughput choices, and vector search architecture.

https://t.co/Ri8YjjrPLr

#AzureCosmosDB #AIApps

[Azure Cosmos DB @AzureCosmosDB]

The partition key is the most important design decision in Azure Cosmos DB. Choose poorly and performance suffers as data grows.

Manohari Jayachandran explains how to reason about it, using a blog's own Posts data as the example.

https://t.co/YZiIYWfG2X

#AzureCosmosDB

[Azure Cosmos DB @AzureCosmosDB]

If you work around developer tools, this is worth a look.

Sajeetharan Sinnathurai covers how MCP could make AI-assisted workflows feel less like stitching together prompts and more like using software that actually understands the job.

https://t.co/cBW7NzbMgJ

[Azure Cosmos DB @AzureCosmosDB]

📺 https://t.co/fZ7PGBWhYV

[Azure Cosmos DB @AzureCosmosDB]

Most RAG retrieves blindly. Agentic RAG retrieves when it should — and finds what matters. 🧠

Yohan Lasorsa (Principal Developer Advocate, Microsoft) extends a working AI agent with:
• Azure Cosmos DB hybrid search (vector + full-text)
• Agent-decided retrieval

Link in comments 👇

#AzureCosmosDB #AzureCosmosDBConf #RAG #AIAgents #VectorSearch #Developers

[Azure Cosmos DB @AzureCosmosDB]

What happens when your database update succeeds, but publishing the event fails?

This practical C# guide explains how the Outbox Pattern helps microservices publish events reliably without fragile dual writes.

https://t.co/xsJoLzEUpu

#DotNet #Microservices

[Azure Cosmos DB @AzureCosmosDB]

How Exclaimer Cut Azure Infrastructure Costs by 70%

@Exclaimer supports more than 80,000 customers, 9.6 million seats, and 21 billion emails each year. See how the company used Azure Kubernetes Service, Azure Cosmos DB, and other Azure services to build a scalable, resilient global platform.

Read the customer story:
https://t.co/rvgL04LLbg

#MicrosoftAzure #AzureCosmosDB #AKS #CloudArchitecture

[Azure Cosmos DB @AzureCosmosDB]

Giving an app access to Azure Cosmos DB comes down to three questions:

Who → managed identity
What → role
Where → scope

This guide explains data-plane RBAC, built-in roles, and how to replace keys with DefaultAzureCredential.

https://t.co/lC71o0VwUJ

#AzureCosmosDB #Security

[Azure Cosmos DB @AzureCosmosDB]

Need off-site, immutable backups for #AzureCosmosDB for compliance? Azure Backup's new vaulted backup preview stores copies in a separate vault with RBAC, soft delete, and long-term retention policies. Different model than built-in replication.

Check out this write-up: https://t.co/doa55OQMBt

[Azure Cosmos DB @AzureCosmosDB]

@Azure 📺 https://t.co/J9zzJrmMgV

[Azure Cosmos DB @AzureCosmosDB]

RU climbing, latency unstable — sound familiar? 📺

Anurag Dutt diagnoses a real Azure Cosmos DB workload: hot partitions, cross-partition queries, over-indexing, bad throughput.

@Azure metrics + diagnostics, not guesswork.

Link in thread 🧵

#AzureCosmosDB #AzureCosmosDBConf #Performance

[Azure Cosmos DB @AzureCosmosDB]

One command gives GitHub Copilot CLI expert-level Azure Cosmos DB infrastructure knowledge:

npx skills add AzureCosmosDB/cosmosdb-agent-kit

After that, point Copilot at a Terraform or Bicep file and ask it to review for multi-region setup, autoscale vs. fixed throughput, backup configuration, partition key strategy — it actually knows the difference. Sajeetharan Sinnathurai wrote the install guide and a solid set of example prompts. 🛠

https://t.co/4pkzLkA1Wj

#AzureCosmosDB

[Azure Cosmos DB @AzureCosmosDB]

Azure Cosmos DB for NoSQL is schemaless, which makes it a natural fit for Go apps that work with JSON documents.

This quickstart covers item creation with upsert, point reads by ID and partition key, and cross-partition queries — all using the azcosmos package, with a real containerized sample app you can deploy and pull apart.

https://t.co/RnbcOW3ADx

#AzureCosmosDB #NoSQL

[Azure Cosmos DB @AzureCosmosDB]

📺 https://t.co/Z6ylbcER2G

[Azure Cosmos DB @AzureCosmosDB]

Live migration: AdventureWorks RDBMS + EF Core → .NET 9 on Azure Cosmos DB for NoSQL 📺

Sergiy Smyrnov (@AzureCosmosDB): schema analysis, partition keys, infra, rewrite, data move — all driven by AI prompts + the Azure Cosmos DB Agent Kit.

Link in thread 🧵

#AzureCosmosDB #AzureCosmosDBConf #DotNet

[Azure Cosmos DB @AzureCosmosDB]

Azure Cosmos DB for NoSQL is schemaless, which makes it a natural fit for Go apps that work with JSON documents.

This quickstart covers item creation with upsert, point reads by ID and partition key, and cross-partition queries — all using the azcosmos package, with a real containerized sample app you can deploy and pull apart.

https://t.co/2yxsGh4AR0

#AzureCosmosDB #NoSQL