Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Latest posts
Integrated Vector Database in vCore-based Azure Cosmos DB for MongoDB is Generally Available!
Editor's note (November 2025): Azure Cosmos DB for MongoDB (vCore) has been renamed to Azure DocumentDB. This article was originally published before the rename, so it uses the product name that was current at the time. While the product name has changed, the technical concepts discussed in this article remain applicable unless otherwise noted. For the latest Azure DocumentDB announcements, features, and technical guidance, visit the Azure DocumentDB Dev Blog. We’re thrilled to share the exciting news that the integrated vector database is now officially available to all users of Azure Cosmos DB for MongoD...
Announcing Azure Cosmos DB Mirroring in Microsoft Fabric – Private Preview
We are excited to announce private preview availability of mirroring your Azure Cosmos DB databases in Microsoft Fabric. Mirroring provides a modern way of accessing your Azure Cosmos DB databases in Microsoft Fabric, helping unify your data estate, thereby eliminating data silos. With just a few clicks, you can now bring your Azure Cosmos DB databases into Microsoft Fabric, for rich business insights using Fabric’s built-in advanced analytics and AI capabilities. Your Cosmos DB operational data is seamlessly and incrementally replicated into Fabric OneLake in near real-time. Data in OneLake is stored in open-s...
Introducing Vector Database in Azure Managed Instance for Apache Cassandra!
We are delighted to announce Cassandra 5.0 in public preview for Azure Managed Instance for Apache Cassandra, with vector search capabilities enabled! Vector Database in Cassandra 5.0 In Cassandra 5.0, the integrated vector database is backed by storage-attached indexes that represent data as vectors in a multi-dimensional space. We use DiskANN, a Microsoft Research-born algorithm that allows for adding new vectors to an index without the need for reindexing, which causes downtime in other vector stores. DiskANN enables fast and accurate similarity-based searches, which can be used to build next-gener...
Run Mongo workloads for free with Azure Cosmos DB for MongoDB vCore – Free Tier
In the ever-evolving landscape of cloud services, Azure Cosmos DB made a notable advancement a few years ago by introducing a dedicated free tier. Today, we're thrilled to extend this remarkable feature to Azure Cosmos DB for MongoDB vCore, empowering our users to unlock the full potential of this platform without any financial commitments. So, if you are gearing up to create a new application, run quick proof of concepts (POC) or manage small-scale production workloads with Azure Cosmos DB then your journey has become smoother with our new Free Tier offering. The Free Tier comes with a default 32GB disk, and ...
Introducing Azure Cosmos DB for MongoDB vCore: Now Generally Available!
Editor's note (November 2025): Azure Cosmos DB for MongoDB (vCore) has been renamed to Azure DocumentDB. This article was originally published before the rename, so it uses the product name that was current at the time. While the product name has changed, the technical concepts discussed in this article remain applicable unless otherwise noted. For the latest Azure DocumentDB announcements, features, and technical guidance, visit the Azure DocumentDB Dev Blog. We're thrilled to announce that following a successful public preview, Azure Cosmos DB for MongoDB vCore has officially launched and is now available fo...
Microsoft Copilot for Azure enables natural language queries for Azure Cosmos DB data
We are thrilled to announce Microsoft Copilot for Azure in Azure Cosmos DB is now in public preview! Microsoft Copilot for Azure is an AI companion that simplifies how you design, operate, optimize, and troubleshoot from cloud to edge. Copilot’s integration into Azure Cosmos DB is an amazing AI-powered capability that can create Azure Cosmos DB NoSQL queries based on your natural language questions about your data! With Copilot, you don't have to worry about the syntax or the structure of your NoSQL queries. Just type in your English-language question about your data and items in your Azure Cosmos DB collectio...
New Offline Migration Feature in Azure Cosmos DB for MongoDB Migration Extension for Azure Data Studio
Editor's note (November 2025): Azure Cosmos DB for MongoDB (vCore) has been renamed to Azure DocumentDB. This article was originally published before the rename, so it uses the product name that was current at the time. While the product name has changed, the technical concepts discussed in this article remain applicable unless otherwise noted. For the latest Azure DocumentDB announcements, features, and technical guidance, visit the Azure DocumentDB Dev Blog. Editor's note (June 2026): Azure DocumentDB Migration Extension for VS Code is now generally available. Read more how to migrate MongoDB workloads to Az...
Azure Cosmos DB design patterns – Part 2: Data Binning
Over the years, customers have asked us for help in designing applications around specific scenarios they were trying to achieve. In some cases, these centered around implementing certain patterns using a JSON-based NoSQL database. Some of these patterns are very common in the NoSQL world, but not well understood by those new to NoSQL databases. Other patterns were very specific to the Cosmos DB service itself in demonstrating how to leverage specific capabilities to solve difficult architectural challenges. We’ve been capturing these patterns and sharing them with customers individually. We felt now was a...
New features for Azure Synapse Link for Azure Cosmos DB
Azure Synapse Link for Azure Cosmos DB is a cloud-native hybrid transactional and analytical processing (HTAP) capability that enables near real-time analytics over operational data in Azure Cosmos DB. Azure Synapse Link creates a tight seamless integration between Azure Cosmos DB and Azure Synapse Analytics. We are excited to announce the new Azure Synapse Link capabilities that will help you to implement analytics workloads on top of your Azure Cosmos DB data. Announcing Synapse Link for existing MongoDB collections: General Availability This capability allows the usage of Synapse Link on collections t...