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Azure Cosmos DB Blog
The latest news, updates and technical insights from the Azure Cosmos DB team
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Join the Conversation: Call for Proposals for Azure Cosmos DB Conf 2025!

Are you passionate about Azure Cosmos DB? Do you have insights, experiences, or innovations that the developer community would love to hear? Now is your cha...
Latest posts

Latest NoSQL Java Ecosystem Updates 2023 Q1 & Q2

We're always busy adding new features, fixes, patches, and improvements to our Java-based client libraries for Azure Cosmos DB for NoSQL. In this regular blog series, we share highlights of recent updates in the last period. January - June 2023 updates Spring data - enhanced multi-tenancy support In January 2023 we added enhanced support for building multi-tenant applications in Azure Cosmos DB using the Azure Cosmos DB Spring Data Client Library. Developers can now implement a database per tenant or container per tenant ...

Azure Cosmos DB: Powering the apps you use every day

Did you know that Azure Cosmos DB powers the apps you rely on every day? From the mobile app you use to order your coffee, to your communications methods at work, to your online shopping and news consumption, Azure Cosmos DB works behind the scenes to power the most popular apps and elastically scale them to meet demand. Here's how a handful of top brands are using Azure Cosmos DB to drive their services: Check out this infographic to learn more: Â About Azure Cosmos DB Azure Cosmos DB is a fully managed and serverless distributed database for modern app deve...

Distributed PostgreSQL benchmarks using HammerDB, by GigaOM

Distributed PostgreSQL has become a hot topic. Several distributed database vendors have added support for the PostgreSQL protocol as a convenient way to gain access to the PostgreSQL ecosystem. Others (like us) have built a distributed database on top of PostgreSQL itself. For the Citus database team, distributed PostgreSQL is primarily about achieving high performance at scale. The unique thing about Citus, the technology powering Azure Cosmos DB for PostgreSQL, is that it is fully implemented as an open-source extension to PostgreSQL. It also leans entirely on PostgreSQL for storage, indexing, low-level query...
Latest features in Azure Managed Instance for Apache Cassandra

Are you self-hosting open-source Apache Cassandra on-premises or in the cloud? What if you could have patching, deployment, scaling, platform security, cloud infrastructure, and live site support taken care of for you... for not much more than the cost of running virtual machines in the public cloud? Welcome to Azure Managed Instance for Apache Cassandra! A first-party service in Azure, built by Azure Cosmos DB engineers, hosting and maintaining pure open-source Apache Cassandra clusters. The service allows you to spend more time focusing on developing your solution while keeping everything you love about Apac...

Announcing Vercel and Azure Cosmos DB Integration

We are excited to announce the public preview of the Vercel and Azure Cosmos DB integration. This new integration improves productivity as developers can now easily create Vercel applications with an Azure Cosmos DB database already configured. With this integration, developers can transform their creative ideas into reality in real-time. Empowering developers to bring their ideas to life Azure Cosmos DB is becoming a popular choice among developers as the go-to database solution for building modern, cloud-based applications. The database offers a range of benefits that make it an attractive option f...

Introducing priority-based execution in Azure Cosmos DB (preview)

The problem  Azure Cosmos DB is a fast and flexible database service that can handle massive amounts of data and scale elastically. However, sometimes you may encounter situations where your application sends more requests than the configured throughput (RU/s) of your container. In such cases, Azure Cosmos DB will throttle some of the requests and return a 429 status code with a retry-after header. This situation can be frustrating and can lead to degradation of application performance and even revenue loss.  The Solution What if there was a way to overcome this situation without incurring the extra cos...

Deep dive: New elasticity features for better cost and performance


Over the years, we’ve heard feedback from many you that you’d like more flexibility in how Azure Cosmos DB handles scaling and partitioning. Based on your feedback, we are excited to announce the general availability of three key features - burst capacity, hierarchical partition keys, and serverless container storage of 1 TB – to help you get the best cost and performance for your applications. Burst capacity (GA) Azure Cosmos DB burst capacity, now generally available, allows you to take advantage of your database or container's idle throughput capacity to handle spikes of traffic. As a result, you can maintai...

Unlocking the power of Time-Travel in Azure Synapse Link for Azure Cosmos DB


Azure Synapse Link now offers time-travel capabilities for Azure Cosmos DB data supporting NoSQL and MongoDB APIs. This exciting feature, currently available in public preview through Azure Synapse Spark, enables you to access Azure Cosmos DB data in the analytical store, precisely as it appeared at specific points in time in history (down to the millisecond level). With time-travel, you can effortlessly query past data that has been updated or deleted, analyze trends, and compare differences between two points of interest. The diagram below illustrates how the BasePrice in the Product container gets updated o...

Announced at MS Build 2023: Burst capacity, materialized views, integrated vector database, and more!

Microsoft Build 2023 kicked off today with exciting sessions and announcements lined up around AI, cloud development, cloud-scale innovation, developer productivity, and more. Azure Cosmos DB announced its own new additions and enhancements, enabling developers to further optimize costs, performance, and productivity. We also introduced new tools for building intelligent, AI-infused applications. We hope you’re able to join us live or in-person in Seattle and that you continue to enjoy the event with us this week! Here’s a look at what’s new from Azure Cosmos DB. Save costs and enhance product...