Mor Hilai

Build vs. Buy: The Real Cost of Adding AI Agents to Your Application

The Business Calculation: Cost, Velocity, and Risk   As a developer or architect, you've likely been asked the question that's on every executive's mind: "When are we adding AI to our product?" The pressure is real - your competitors are announcing AI features, your users expect intelligent interactions, and your management wants that ChatGPT-like magic,...

RavenDB Launches the First Fully Integrated, Database-Native AI Agent Creator

Unlike the limited embedded solutions on the market, this first-of-its-kind feature lets developers build fully native AI agents to turn existing data into personalized experiences. HADERA, Israel—[September 8, 2025] RavenDB, a multi-model NoSQL document database trusted by developers and enterprises worldwide, today announced the launch of its AI Agent Creator, a first-to-market feature fully integrated...

RavenDB Ltd. Officially Replaces Hibernating Rhinos Ltd. as Company Name in Israel

Hadera, Israel, August 6, 2025, RavenDB, the developer behind the high-performance NoSQL document database used by thousands of organizations worldwide, today announced that its Israeli headquarters has officially changed its legal business name from "Hibernating Rhinos Ltd." to "RavenDB Ltd.," effective August 3, 2025. This name change brings the Israeli entity into full alignment with...

RavenDB and QBS Software Announce Strategic Partnership to Expand NoSQL Innovation Across UK and Europe

LONDON, England — RavenDB, the pioneer of hybrid NoSQL document databases for modern applications, today announced a strategic partnership with QBS Software, a leading software distributor with a robust network of resellers and system integrators across the UK and Europe. This alliance is set to accelerate the adoption of RavenDB’s high-performance, developer-first data platform throughout...

Share Your Experience with RavenDB on Gartner Peer Insights

Are you using RavenDB for your database management needs? Your insights can help shape the future of enterprise database solutions while assisting peers in making informed decisions. By submitting a Gartner Peer Insights review, you provide valuable feedback on how RavenDB compares to other database management platforms, including our competitors. Why Your Review Matters Gartner...

RavenDB is Now Available on AWS Marketplace

We’re excited to announce that RavenDB is now available on the AWS Marketplace, making it easier than ever for businesses to deploy and manage our high-performance NoSQL database in the cloud. Why This Matters By joining AWS Marketplace, we’re providing users with a seamless purchasing experience, flexible deployment options, and direct integration with their AWS...

Partial writes, IO_Uring and safety

In my previous post, I discussed how Linux will silently truncate a big write (> 2 GB) for you. That is expected by the interface of write(). The problem is that this behavior also applies when you use IO_Uring. Take a look at the following code:struct io_uring_sqe *sqe = io_uring_get_sqe(&ring); if (!sqe) { return 1;...

Cloned Dictionary vs. Immutable Dictionary vs. Frozen Dictionary in High Traffic Systems

Key Takeaways ImmutableDictionary is easy to use for publishing state across transactions, but it suffers from high memory and performance overhead due to its AVL tree structure. Cloning a regular dictionary is conceptually simple and thread-safe, but comes with high allocation costs, especially as data size grows. Builder-based approaches using ImmutableDictionary.CreateBuilder() reduce per-operation overhead but...

A twisted tale of memory optimization

I was looking into reducing the allocation in a particular part of our code, and I ran into what was basically the following code (boiled down to the essentials): As you can see, this does a lot of allocations. The actual method in question was a pretty good size, and all those operations happened in...

Unhandled Exception Episode 55: RavenDB and Database Internals – with Oren Eini

You can listen to me talk with Dan in the Unhandled Exception podcast, where we dug deep into the internals of database engines. As usual, I would love your feedback.

A performance profile mystery: The cost of Stopwatch

Measuring the length of time that a particular piece of code takes is a surprising challenging task. There are two aspects to this, the first is how do you ensure that the cost of getting the start and end times won’t interfere with the work you are doing. The second is how to actually get...

QCon San Francisco Workshop: Building a database from the ground up

I’m going to QCon San Francisco and will be teaching a full day workshop where we’ll start from a C compiler and  an empty file and end up with a functional storage engine, indexing and more. Included in the minimum requirements are implementing transactions, MVCC, persistent data structures, and indexes. The workshop is going to...

Struct memory layout and memory optimizations

Consider a warehouse that needs to keep track of items. For the purpose of discussion, we have quite a few fields that we need to keep track of. Here is how this looks like in code:And the actual Warehouse class looks like this:The idea is that this is simply a wrapper to the list of...

Oren Eini on Building Projects that Endure

Oren Eini began creating RavenDB 15 years ago and the project is still going strong. He discusses some of the things he learned about maintaining a project over many years so that they will endure.

All the Performance with RavenDB’s Oren Eini

In this episode, Scott Hanselman talks to Oren Eini from RavenDB. RavenDB is a NoSQL document database that offers high performance, scalability, and security. Oren shares his insights on why performance is not just a feature, but a service that developers and customers expect and demand. He also explains how RavenDB achieves fast and reliable data...

Scalable Architecture From the Ground Up

Café debug interview with Oren Eini CEO of RavenDB

Café debug had a conversation with Oren Eini CEO of RavenDB an open-source, document-oriented NoSQL database written in C# and with full ACID operations support.  In this program, Oren told about his experience, life as CEO at RavenDB, and some of the purposes of RavenDB compared to other NoSQL databases on the market.  Subjects covered...

Fixing Colors & Implementing Geographical Search in ‘Next Tech Event’ w Blazor & RavenDB

In this episode, Coding After Work dives into an exciting feature – geographical search! Discover how they started implementing this dynamic feature to enhance user experience. Also, they fine-tune the color scheme for a more visually appealing interface.

Refining Themes & Introducing Contextual Search in ‘Next Tech Event’ with Blazor & RavenDB

Dive into Part 19 of our ongoing project, "NextTechEvent", a unique platform dedicated to connecting speakers, organizers, and attendees with the next big tech event. In this stream, we reassess our color scheme and make significant progress in implementing the light/dark theme. Though not entirely finished, it's in a releasable state. We also introduce a...

Coffee and Open Source Conversation – Dejan Miličić

Dejan Miličić is an enthusiastic consultant and developer advocate at RavenDB with more than 20 years of experience as a professional software developer in designing, writing, and maintaining applications. Dejan is passionate about Open Source, RavenDB, Software Architecture, and Software Professionalism, supporting the Software Crafting Serbia community via workshops and meetups. He is an active...

Practical Security Foundations | Oren Eini

In this session, Oren Eini will discuss what every developer needs to know about security, cryptography and how they should be utilized. There is going to be no math in this talk, instead, we are going to focus on the kind of practical decisions that developers often have to make in their software and what...

Solving support issues in other people’s products

A user contacted us to tell us that RavenDB does not work in his environment. As you can imagine, we didn’t really like to hear that, so we looked deeper into the issue. The issue in question included the actual problem, which looked something like this: { "Url": "/auth/", "Type": "Raven.Client.Exceptions.Routing.RouteNotFoundException", "Message": "There is no...

Looking into Corax’s posting lists: Part I

One of the big changes in RavenDB is the new search engine, Corax. We want to replace Lucene with a purpose built search engine, capable of doing everything that we can do with Lucene, but far faster. In this post, I want to discuss a particular detail of the implementation. Managing the posting list. In...

RavenDB with Oren Eini at The .NET Core Podcast Ep. 111

Software Architecture with RavenDB CEO Oren Eini

Building “Next Tech Event” using Blazor and RavenDB Part 11

The DevLab Podcast with Dejan of RavenDB

C# as a System Language

Getting started with RavenDB

ACID Database for Securely Storing Bulk Data

A single RavenDB server powering 150 organizations - how Sentinel uses RavenDB’s ACIDity and features like backup-restore to securely store bulk data. While RavenDB is known for its advanced clustering capabilities, Sentinel’s experience shows that even a single RavenDB server is reliable enough to serve over a hundred organizations for years. Epsilon is a company...

The Productive C# Podcast: RavenDB and .NET with Oren Eini

Database Synchronization in an Event Management App

Using database compare-exchange to synchronize accounts in an event management app. Learn how Sam Entertainment takes advantage of RavenDB's NoSQL flexibility, compare-exchange values, and other advanced database features to deliver a seamless and memorable event experience for users. Sam is an innovative event-based social media app for weddings and other social gatherings. Anyone planning an...

Building “Next Tech Event” using Blazor and RavenDB

The system that prevents problems instead of solving them

The Latest on RavenDB with Dejan Milicic

How to Adapt to Changes and Process Big Data Sets Faster

NoSQL Databases were first developed in the early 21st century to pick up where relational databases, first developed in the 1960s, left off. They are known for being non-relational, open-source, distributed, and scalable. They meet the next level of data load and the new form modern-day data takes. NoSQL database models like the document model enable greater...

The Smartest Compression Features on the Market

This article is a thorough but accessible dive into the theory and rationale behind data compression algorithms and the way databases use them. We will compare the capabilities of a couple of different databases to find out how RavenDB is able to use compression so effectively. Table of contents IntroductionThe Speed ParadoxMore Data In, Better...

Webinar next week: Clean Architecture with RavenDB

Next week I'll be talking about how you can utilize RavenDB to create a clean architecture for your systems.

Webinar: Database Security in a Hostile World

On March 9, I’m going to be talking about Database Security in a Hostile World. Please join me, I promise it will be interesting.

RavenDB: Domain Modeling and Data Persistency

re: Are You Sure You Want to Use MMAP in Your Database Management System?

I was pointed to this paper on twitter: Are You Sure You Want to Use MMAP in Your Database Management System? As you can imagine, this is a topic near and dear to my heart. This is especially the case since I am currently writing the Implementing a file pager in Zig posts series. I...

How cross signing works with X509 certificates

This is an interesting and somewhat confusing topic, so I decided to write down my understanding of how certificate signatures work with cross signing. Key Takeaways X.509 certificates use digital signatures to establish trust, relying on a chain of issuers that traces back to a trusted root certificate. Cross signing allows a certificate (with the...

RavenDB Distributed Database Stays Up While AWS Fails

AWS Disaster Rendered Non-Event by RavenDB Distributed Database A trillion-dollar cloud platform fails, bringing down countless instances of applications and their component parts while not a single RavenDB client experiences a service disruption. June 10, Frankfurt, Germany. The AWS Availability Zone in Germany went down due to a climate malfunction in one of their server...

Discovering a new database: RavenDB

Next month I will start working for a new company. That means a new Starbucks, a new office chair, and of course, working with new software. One of my first new applications will be working with RavenDB, a NoSQL Document Database. RavenDB is developed in C#. It was created by Oren Eini, also known as...

A Database that Saves Money

And capitalizes on new features on the cloud without harassing you every six months with higher prices. The elite can afford to solve any problem by simply throwing money at it. What about the rest of us who have to carefully measure the expense against the benefit for every decision? What about startups and small...

Using NuGet Packages to Power Up RavenDB Indexes

Uncover the power of NuGet packages within RavenDB indexes to offload work like image EXIF indexing or ML.NET analysis. In RavenDB 5.1, you can now use third-party NuGet packages and load binary data (or "attachments") within your indexes without any additional code deployment necessary. In this article, I’ll showcase how to use these two features...

Yet Another Bug Tracker Series

NoSQL is not hard, it’s different. And to show that, RavenDB and Alex Klaus kick off a new series of articles dedicated to building enterprise applications leveraging the .NET Core + RavenDB bundle. Database Integration Testing – The Secret Recipe The practical superiority of RavenDB for integration testing. Key features, examples, and comparisons with other...

HIPAA Database Compliance: The Easy Way

We have seen an expansion of data collection in recent years. This became prominent with the growing amount of time we spend online. Not only that, but the need for improving processes and networking means that a lot of businesses have this data available on a network somewhere in virtual space. Sometimes the data collection...

Best Database for High Availability

Inevitable failure and seamless recovery - a response to the Cloudflare postmortem post discussing a recent outage lasting for several hours. I found it fascinating to look at what happened and compare it to how RavenDB would behave in such a situation. I have been working non-stop on RavenDB for the better part of a decade, in...

NoSQL Document-Oriented Databases: A Detailed Overview

Highlights: NoSQL document databases, such as RavenDB, store data in JSON-like documents, offering a flexible and intuitive way to handle semi-structured data compared to traditional relational databases. Unlike relational databases, NoSQL document databases allow for dynamic, self-describing schemas, enabling developers to modify data structures without disruptive schema migrations. NoSQL document databases provide powerful querying capabilities...