Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Latest posts
General Availability: Priority-Based Execution in Azure Cosmos DB
Have you ever faced a situation where two different workloads share the same container, and one ends up slowing down the other? This is a common challenge for many of our customers running applications on Azure Cosmos DB. Imagine these scenarios: In all these cases, there’s one workload you’d prefer to prioritize, ensuring critical operations run smoothly while others can progress slowly during resource contention. Introducing Priority-Based Execution Priority-Based Execution solves this problem. It lets you assign high priority to critical workloads and low priority to less important ones using...
Announcing Preview of Online Copy Jobs in Azure Cosmos DB: Migrate Data with Minimal Downtime!
We are excited to announce the preview of Online Copy Jobs, a powerful new feature designed to make data migration between containers seamless and efficient with minimal downtime. With this feature, you can replicate data from a source to a destination container in real time without disrupting your applications. What is an online copy job? Online Copy Jobs allow you to copy data from a source container to a destination container while your applications continue to run on the source. All data including incremental updates is automatically replicated, ensuring the destination container becomes an up-to-date repli...
Announced at Ignite 2025: Azure DocumentDB, MCP Toolkit, Fleet Analytics, and more!
Microsoft Ignite 2025 kicked off with a wave of announcements for Azure Cosmos DB and Azure DocumentDB, setting the tone for a week of innovation in cloud databases and AI. Here’s your one-stop summary of everything unveiled—and what to watch for in the sessions ahead. Major Azure Cosmos DB announcements from Ignite 2025 Azure DocumentDB now Generally Available Azure DocumentDB is now generally available, bringing a new level of openness, flexibility, and cost efficiency to MongoDB workloads. Built on the open-source DocumentDB engine – now governed by the Linux Foundation – Azure DocumentDB delivers Mongo...
Introducing Index Advisor for Azure DocumentDB (Preview)
Editor's note (May 2026): This article was published in the Azure Cosmos DB Dev Blog before the launch of the dedicated Azure DocumentDB Dev Blog. Azure DocumentDB now has its own home for product announcements, engineering insights, migration guidance, technical deep dives, and developer tutorials. If you're building with Azure DocumentDB or the open-source DocumentDB project, we recommend bookmarking the Azure DocumentDB Dev Blog for the latest news and technical content. We’re excited to announce the public preview of Index Advisor for Azure DocumentDB (with MongoDB Compatibility). It is a built-in AI power...
Azure Cosmos DB Extension for VS Code Now Generally Available
We’re thrilled to announce the general availability (GA) of the Azure Cosmos DB extension for Visual Studio Code! This powerful extension brings enterprise-grade database management directly into your development environment, making it easier than ever to build, test, and deploy applications powered by Azure Cosmos DB. Why This Matters for Azure Cosmos DB Developers As a Cosmos DB developer, you know the importance of rapid iteration and seamless workflows. The Azure Cosmos DB VS Code extension eliminates context switching by bringing your database management tools directly into your I...
Now Generally Available: Azure Cosmos DB Fleet Pools
We’re excited to announce two updates to Azure Cosmos DB fleets: Azure Cosmos DB fleets enables developers to build scalable, isolated, and cost-effective multi-tenant or Software as a Service (SaaS) applications. Today, many SaaS providers using Azure Cosmos DB isolate each tenant (the end customer of the SaaS provider) in a separate database account to meet strict performance and security requirements—for example, supporting customer-managed keys. While this approach ensures tenant isolation, it creates operational complexity at scale. Managing thousands of RU/s settings becomes difficult, and p...
Public Preview: Azure DocumentDB Migration Extension Now Supports Online Migration to Azure DocumentDB (with MongoDB compatibility)
Editor's note (May 2026): This article was published in the Azure Cosmos DB Dev Blog before the launch of the dedicated Azure DocumentDB Dev Blog. Azure DocumentDB now has its own home for product announcements, engineering insights, migration guidance, technical deep dives, and developer tutorials. If you're building with Azure DocumentDB or the open-source DocumentDB project, we recommend bookmarking the Azure DocumentDB Dev Blog for the latest news and technical content. We’re excited to announce the Public Preview of a significant enhancement to the Azure DocumentDB (with MongoDB compatibility) Migration e...
Azure DocumentDB is Now Generally Available
Azure DocumentDB, a fully managed MongoDB-compatible database service based on the open-source DocumentDB governed by the Linux Foundation, is now generally available. It was formerly known as vCore-based Azure Cosmos DB for MongoDB. Azure DocumentDB gives developers a multi-cloud, first-party document database on Azure that preserves MongoDB skills and tooling, improves portability through open source, and delivers clear cost control with a simple compute and storage-based model. At Ignite, we announced the AI-powered Index Advisor, Premium storage v2 disks, and the VS Code migration extensio...
Announcing: GA of Cosmos DB in Microsoft Fabric and Cosmos Mirroring
We’re excited to announce that Cosmos DB in Microsoft Fabric and Cosmos DB Mirroring are now Generally Available, uniting your operational and analytical data in one platform. You can now analyze live Cosmos DB data directly in Fabric—no complex or costly ETL required. Data stays in sync in OneLake, providing a single source of truth for real-time and historical insights. Write queries using T-SQL from a SQL Endpoint or use Python and Spark Notebooks in Fabric. As a distributed NoSQL database Cosmos DB in Fabric brings support for semi or unstructured data to analytics and ML workloads as well as a host of a...