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RavenDB Partners with Microsoft to Deliver Next-Generation Data Solutions

January 20, 2025

We are thrilled to unveil our new partnership with Microsoft. This collaboration combines RavenDB’s innovative NoSQL database technology with Microsoft’s robust cloud and data platforms. The result is scalable, secure, high-performance data solutions that seamlessly integrate with Azure and other Microsoft technologies. RavenDB and Microsoft…

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Production post-mortem: Inspecting ourselves to death

January 17, 2025

The problem was that this took time – many days or multiple weeks – for us to observe that. But we had the charts to prove that this was pretty consistent. If the RavenDB service was restarted (we did not have to restart the machine), the situation would instantly fix itself and then slowly degrade over time. The scenario in question was…

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Accidenal complexity: A tale of two GUIDs

January 15, 2025

For a new feature in RavenDB, I needed to associate each transaction with a source ID. The underlying idea is that I can aggregate transactions from multiple sources in a single location, but I need to be able to distinguish between transactions from A and B. Luckily, I had the foresight to reserve space in the Transaction Header, I had a whole 16…

Articles

Connecting C# application to RavenDB Cloud

January 13, 2025

What you will learn How to connect to your RavenDB Cloud instance with C# How to confirm your connection is established Introduction RavenDB Cloud is a managed RavenDB service ready to launch in minutes. It serves as database hosting, management studio, and managed services of backing up data. All in one place. Connecting your C#…

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The memory leak in ConcurrentQueue

January 13, 2025

We ran into a memory issue recently in RavenDB, which had a pretty interesting root cause. Take a look at the following code and see if you can spot what is going on: ConcurrentQueue<Buffer> _buffers = new(); void FlushUntil(long maxTransactionId) { List<Buffer> toFlush = new(); while(_buffers.TryPeek(out buffer) && buffer.TransactionId…

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Performance discovery: IOPS vs. IOPS

January 10, 2025

RavenDB is a transactional database, we care deeply about ACID. The D in ACID stands for durability, which means that to acknowledge a transaction, we must write it to a persistent medium. Writing to disk is expensive, writing to the disk and ensuring durability is even more expensive. After seeing some weird performance numbers on a test machine,…

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Upcoming Upgrade to 6.2 in RavenDB Cloud

January 8, 2025

Introduction RavenDB Cloud is rolling out upgrades on clusters to RavenDB version 6.2, bringing exciting new features and improvements to enhance your database experience. With the upgrade process beginning in February 2025 for Free and Development Tiers and continuing through September 2025 for Production Tier clusters, this is the perfect…

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Aggregating trees with RavenDB

January 7, 2025

We got an interesting question in the RavenDB discussion group:How to do aggregation on a tree structure? The task is to build a Work Breakdown Structure, where you have: Projects Major deliverables Sub-deliverables Work packages The idea is to be able to track EstimatedHours and CompletedHours across the entire tree. For example, let’s…

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Performance discovery: Managed vs. Unmanaged memory

January 3, 2025

When building RavenDB, we occasionally have to deal with some ridiculous numbers in both size and scale. In one of our tests, we ran into an interesting problem. Here are the performance numbers of running a particular query 3 times. First Run: 19,924 ms Second Run: 3,181 ms Third Run: 1,179 ms Those are not good numbers, so we dug into this…