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An optimization story:–27% runtime costs for 8 lines of code

December 6, 2021

I give a lot of talks about performance and in those talks, I tend to emphasize the architectural impact of your choices. There is a huge tendency to focus on micro optimizations to get the performance you need, even though you can usually get orders of magnitude higher performance by making architectural changes. Good architecture can still…

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Dealing with complex hierarchies in RavenDB

December 1, 2021

For many business domains, it is common to need to deal with hierarchies or graphs. The organization chart is one such common scenario, as is the family tree. It is common to want to use graph queries to deal with such scenarios, but I find that it is usually much easier to explicitly build your own queries.. Consider the following query, which…

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RavenDB custom sorting and when not to use it

November 30, 2021

RavenDB has the notion of Custom Sorters, basically, we allow you to inject your own logic into the sorting process. That allows you to run any complex logic you have around sorting. There are rarely good reasons to want to use that. A good use case for that is when you need to sort by an external value that mutates outside of your control. Let’s…

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RavenDB Subscriptions & Messaging patterns

November 29, 2021

RavenDB is a database, not a queue or a service bus. That said, you can make use of RavenDB subscriptions to get a very similar behavior to a service bus. Let’s see how much effort it will take us to implement backend processing using RavenDB only. We assume that we have commands or messages, that are written to the Commands collection and are…

Use Cases

NoSQL Document Database Scale-Out

November 26, 2021

Supporting the Rapid Scale-Out of Playwaze What happens when you wake up one day to see 200,000 new users in your system? How do you make sure your application doesn’t pop before the champagne does? Playwaze, a digital sports center for sports leagues, woke up one day to four stadiums worth of new fans on their platform. Whether it’s a…

document database devops map reduce 2

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RavenDB 5.3 New Features: Revisions includes

November 26, 2021

Enabling RavenDB’s revisions allows you to ask RavenDB to keep immutable copies of a document. We originally envisioned this feature as a way to have easy audit trails and a time travel feature. Revisions were meant to be something that you’ll typically access as the administrator, not something that we expected to be used in normal course of…

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RavenDB 5.3 New Features: JSON Patch

November 25, 2021

JSON Patch is a feature that allows the frontend to send a set of changes on documents. If you are working with complex documents, that can result in a significant reduction in bandwidth. There are many scenarios where the client can modify a document on the browser, then produce the JSON Patch to make the server match the changes. In RavenDB 5.3,…

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RavenDB 5.3 New Features: Studio & Query improvements

November 24, 2021

I like to think about myself as a database guy. My go to joke about building user interfaces is that a <table> is all I need for layout (it’s not a joke). About a decade ago I just gave up on trying to follow what is going on in the frontend land and accepted that I’ll reside in the backend from here on after. Being ignorant of the ways you’ll…

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RavenDB 5.3 New Features: TCP Compression

November 23, 2021

Most of the time, you’ll communicate with RavenDB using HTTP, making REST calls. When you are doing that, you can take advantage of request compression. If the client indicates that it is able to by sending a Content-Encoding: gzip, RavenDB will send the data to you compressed. Given that we are working with JSON texts, which compress very well,…