Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Latest posts
Meet the Winners | Microsoft Developers Azure AI & Azure Cosmos DB Learning Hackathon
Azure Cosmos DB powers some of the world’s most popular intelligent apps like ChatGPT. In a recent hackathon, Over 9,500 developers engaged with Azure Cosmos DB and Azure AI services, making it one of the most popular on Devpost, ranking in the top 0.2% of all Devpost hackathons. Participants explored AI fundamentals and built their own AI applications using Azure. We're excited to showcase the top three winners, who leveraged Azure Cosmos DB and Azure AI to address diverse use cases, including acing job interviews, streamlining video editing, and offering insightful dietary recommendations. We also want to h...
Enhancing Data Explorer: Custom Columns, Filter History, and Query Views Explained
Managing large amounts of data is exciting. As a dataset grows in complexity and size, finding efficient ways to sort and analyze this info becomes more important. Azure Cosmos DB Data Explorer is a tool to query, review, and manage your data. We’ve heard from your feedback in our NPS survey that there’s a need for more options to dive deeper into your data within Data Explorer when using filters. Users have often faced challenges in customizing their data views, sorting their Items and quickly reapplying previous filters. These pain points can lead to inefficiencies and frustrations, especially when time is tig...
Introducing RBAC Authentication and more for the Azure Cosmos DB Integrated Cache
We’re excited to announce new features for the Azure Cosmos DB integrated cache! The integrated cache is built into the dedicated gateway, and now there’s new ways to authenticate your requests. Security is top of mind for many organizations, and you can now use Role-Based Access Control (RBAC) with Microsoft Entra ID to authenticate to the dedicated gateway, eliminating the security risks and complications that come with key-based authentication. Additionally, there’s a new request option that gives you fine grained control over which requests populate the integrated cache. RBAC authentication with Microsof...
Microsoft DiskANN in Azure Cosmos DB Whitepaper
We are excited to publish a new whitepaper titled, Microsoft DiskANN in Azure Cosmos DB, where we examine the impressive capabilities of Microsoft DiskANN, a state-of-the-art indexing system designed for accurate and cost-efficient vector search at any scale. We start off with a review of key vector search and database concepts, then follow by describing Microsoft DiskANN and how it works. We conduct comparisons against other popular vector indexing algorithms on two datasets and demonstrate how Microsoft DiskANN requires up to 10x lower memory, which is critical to making vector search more cost-effective and...
Announcing Private Preview: VS Code Extension of vCore-based Azure Cosmos DB for MongoDB
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. Overview We're excited to introduce a new VS Code extension for vCore-based Azure Cosmos DB for MongoDB ! This tool allows users to connect, query, and m...
Introducing New Storage Sizes for vCore-Based Azure Cosmos DB for MongoDB: Unlock More Capacity and Performance
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 the preview of new storage sizes for vCore-based Azure Cosmos DB for MongoDB, designed to provide more capacity and enhanced ...
Announcing Azure Cosmos DB Integration with LangChain.js!
Announcing Azure Cosmos DB Vector Store Integration with LangChain.js! We're simplifying AI app development by integrating Azure Cosmos DB's cost-effective and scalable vector search directly with LangChain.js! This powerful combination empowers JavaScript developers to efficiently manage fast and accurate data retrieval with Azure Cosmos DB's scalability and efficient vector search capabilities. This offers a powerful solution for developers aiming to leverage vector search capabilities in their applications. Azure Cosmos DB supports vector indexing and search, allowing for efficient handling of high-dimensiona...
Scale Your Database Workloads with Multishard Clusters in vCore-based Azure Cosmos DB for MongoDB
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 excited to introduce significant enhancements to vCore-based Azure Cosmos DB for MongoDB with the release of multishard clusters preview, designed...
Discover the New Azure Cosmos DB Samples Gallery!
We are thrilled to introduce the Azure Cosmos DB Samples Gallery —your ultimate destination for top-tier Azure Cosmos DB samples, technical guidance, and content created by both Microsoft and the community, including Azure OpenAI samples. Who is it for? Designed for developers and technical professionals, this gallery is an invaluable resource for both new and existing customers. What can you find? Explore a diverse array of content tailored for Azure Cosmos DB, including: Why use it? The gallery features intuitive filters to help you quickly find content related to AI app...