Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
Featured posts
Azure Cosmos DB Conf 2025: Learn, Build, and Connect with the Community
Join us for the 5th annual Azure Cosmos DB Conf, a free virtual developer event co-hosted by Microsoft and the Azure Cosmos DB community. This is your oppor...
Latest posts
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
We’re excited to introduce significant enhancements to vCore-based Azure Cosmos DB for MongoDB with the release of multishard clusters preview, designed to take scalability and performance to the next level. This update brings several new capabilities that address the needs of demanding database workloads, making it easier than ever to manage large datasets and handle high-throughput applications. Increased number of physical shards vCore-based Azure Cosmos DB for MongoDB now allows you to expand your cluster beyond the previous limit of two physical shards, supporting up to five physical shards by default, wit...
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...
Announcing Private Preview: Read and Read/Write Privileges with Secondary Users for vCore-Based Azure Cosmos DB for MongoDB
 We are excited to announce the private preview of a new feature in vCore-based Azure Cosmos DB for MongoDB —Role-Based Access Control (RBAC) Integration for Secondary Users with Read/Read Write Privileges. This enhancement is designed to give organizations more granular control over their database security while maintaining the flexibility and performance that vCore-based Azure Cosmos DB for MongoDB is known for. What’s New? The vCore-based Azure Cosmos DB for MongoDB (vCore) now supports the integration of RBAC for secondary users with Read/Read Write privileges. This feature allows administr...
Announcing the GA of Dynamic Scaling (Per Region and Per Partition Autoscale)
We are excited to announce the GA of Azure Cosmos DB dynamic scaling – among multiple new features (Binary Encoding, Reserved Capacity) released recently to make your Azure Cosmos DB workloads even more cost efficient. Dynamic scaling is an enhancement to autoscale which provides cost optimization for nonuniform workloads. In the earlier version of autoscale, all partitions scaled uniformly based on the most active partition, which caused unnecessary scale-ups if only one or a few partitions were active. With this new feature, partitions and regions now scale independently, improving cost efficiency for non-unif...
Announcing Cost and Performance Improvements with Azure Cosmos DB’s Binary Encoding
We are excited to announce a significant enhancement to Azure Cosmos DB, bringing substantial cost savings and performance improvements to our users. The new binary encoding feature is now available for new containers and will soon be available for existing ones. What is Binary Encoding? Binary encoding converts JSON or other text-based data formats into a compact binary representation. Instead of storing data as human-readable text, it stores it as a sequence of bytes, which takes up less space and can be processed more quickly by computers. Key Benefits When will it be available Binary-encoding...
DiskANN for Azure Cosmos DB Now in Open Public Preview!
We’re excited to announce that the DiskANN vector index is now in open public preview in Azure Cosmos DB for NoSQL! This means that anyone who enrolls an Azure Cosmos DB for NoSQL resource in the Vector Search Public Preview now automatically gets access to the most powerful and scalable vector index on the planet. What is DiskANN? DiskANN is a powerful set of algorithms developed at Microsoft Research for low-latency, cost-effective, and highly accurate vector search at scale. It's an ideal solution for applications requiring fast and efficient search capabilities without compromising on ...
Enabling IP Access Control Policy for Azure Portal: A Necessity
Managing IP access control policies is essential for maintaining a secure Azure environment. These policies allow you to restrict access to your resources based on specific IP addresses, adding an extra layer of security to prevent unauthorized access. To avoid disruptions when accessing your Azure Cosmos DB for MongoDB or Apache Cassandra API accounts through the Azure Portal, be sure to enable requests from the portal. This step ensures that features like Data Explorer remain accessible. Follow the instructions in this blog post to configure your IP access control policies correctly. New Portal IP Addresses...
Introducing the Data API Preview in vCore-based Azure Cosmos DB for MongoDB
We're excited to announce the preview of the Data API for vCore-based Azure Cosmos DB for MongoDB. The Data API provides a flexible and powerful way to interact with your database through HTTP-based API calls. What is the Data API The Data API for vCore-based Azure Cosmos DB for MongoDB allows you work with your MongoDB data through simple HTTP requests, eliminating the need for traditional drivers or  complex queries. It offers an easy way to perform basic operations like creating, reading, updating, and deleting data directly from your applications. This simplifies connecting your MongoDB data to web app...