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A NoSQL Database in Easy Mode

February 12, 2020

We like to talk a lot about bundled transactions, ACID data integrity, and high performance. In this article, you get a peek under the hood of the database layer of your application to see how it works in real-time. RavenDB Core Developer Michael Yarichuk goes step by step in connecting a RavenDB Document Database to an application and performs…

nosql-database

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The magic of the infrastructure

February 10, 2020

I did a code review recently and pretty much the most frequent suggestion was something along the line of: “This needs to be pushed to the infrastructure”. I was asked to be clearer about this, so I decided to write a blog post about it. In general, whenever you see a repeating code pattern, you don’t need to start extracting it. What you need to…

Blog

Proper document modeling and multi document transactions

February 6, 2020

One of the first features that RavenDB had, from the very first release, was multi document ACID transactions. With RavenDB you could modify multiple documents at the same time and then save them all, knowing that they would be be saved as a single atomic unit. Other NoSQL databases had you jump through fire if you wanted transactional behavior…

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The results of upgrading RavenDB to .NET Core 3.1

February 4, 2020

Last week we upgraded our internal production servers to run RavenDB under .NET Core 3.1. Here are the CPU metrics over the past two weeks. It isn’t the only change in the deployed version, but none of the others were about performance .…

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The design and implementation of a better ThreadLocal<T>

February 3, 2020

I talked about finding a major issue with ThreadLocal and the impact that it had on long lived and large scale production environments. I’m not sure why ThreadLocal<T> is implemented the way it does, but it seems to me that it was never meant to be used with tens of thousands of instances and thousands of threads. Even then, it seems like the GC…

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Production Postmortem: The slow slowdown of large systems

January 31, 2020

The last production postmortem that I blogged about in real time was almost a year ago. This is something that makes me very happy, considering the uptick we see in RavenDB usage. All the efforts we put into making RavenDB more stable, predictable and robust has been paying off. The “downside” of that is that I have less interesting stories to…

Articles

Keeping Our New Year’s Resolution: A Lean Database for 2020

January 27, 2020

In a recent survey, 57% of New Year’s Eve partygoers said that losing weight is their resolution for 2020. You have to admire their persistence; they made the promise in 2016. At RavenDB, that was also our resolution for 2016. We renewed our pledge to stay lean for 2017, 2018, 2019, and 2020. Can a database lose weight? Can your…

nosql-database

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The network is ALWAYS hostile

January 24, 2020

The 4th fallacy of distributed computing is that the network is secured. It is a fallacy because sooner or later, you’ll realize that the network isn’t secured. Case in point, Microsoft managed to put 250 million support tickets on the public internet. The underlying issue is actually pretty simple. Microsoft had five Elastic Search instances…

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The Inversion of Control pattern in the test of time

January 22, 2020

I run into a really interesting discussion on Twitter, I suggest you go over the whole thread, it is fascinating reading. This is the simplest example that ignores important features like mixed object lifetimes. That’s why I scoff at these posts… Show a *real* example of an object graph that mixes scoped, transient and singleton dependencies.…