Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net

+972 52-548-6969

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Couchbase vs RavenDB Performance at Rakuten Kobo Whitepaper

May 29 2025

RecordingRavenDB's Upcoming Optimizations Deep Dive

time to read 1 min | 60 words

Yesterday I gave a live talk about some of the re-design we did to the internals of RavenDB’s storage engine (Voron). I think it went pretty well, and the record is here.

Would love to hear your feedback!

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29 May 2025
16:45 PM

Scooletz

What a massive presentation! As a person who spent some time with a db written in .NET I can strongly relate to some points. Personally, I found the following important/worth to mention:

The design of the new pager with atomic swap and lock. Simple, effective, very nice.
Page fault with mmap in .NET and GC. I got hit by it terribly while working with data >> RAM. I think it's the first time I heard it someone mentioning this issue.
File coherence with unbuffered IO. Sorry to hear that you spent some time debugging it. Yes, if you go with unbuffered, some juggling when using mmap is needed.
Stack trace in Raven Studio. This is awesome. I was not aware of the advancements in this area of the product
Write benchmarks. It would be nice to see not only concurrent but also the queue depth / ring IO benchmarked if possible
Shared journal architecture. I read the idea of linking before. Still thinking that it's great
fsyncing for meta on the parent always halts my mind for a second. If fsyncs on files were not enough!

A great presentation with an awesome summary of the performance improvements. Congrats!

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