Slow and predictable vs. fast and bursty

This is a tale of two options that we took for an exhaustive test. Amazon recently came out with a new disk type on the cloud. As a database vendor, that is of immediate interest to me, so we took a deep look into that. GP3 disks are about 20% cheaper than their GP2 equivalent. What is more, they come with a guarantee level of performance even…

Disk space management inside Voron

Voron is RavenDB’s storage engine. It is how we store data, keep transactions and in generally get a lot of our abilities. In this post, I want to talk about the way RavenDB manages disk space internally.  Voron uses a single data file to do its work, the data file is divided into 8KB pages, like so: Voron uses eager disk allocations to reserve…

Filtered Replication

Filtered Replication enables you to deliver better applications by letting RavenDB shoulder the task of not only holding your data but securely disseminating it between the cloud and the edge. RavenDB is a distributed database. That can mean a lot of things so let me pinpoint exactly what I’m talking about. RavenDB allows you to run a database…

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 no small part to…

Whitepaper: Couchbase vs RavenDB Performance at Rakuten Kobo

We just published a white paper on RavenDB performance vs. Couchbase performance in a real customer scenario. I had to check the results three times before I believed them. RavenDB is pretty awesome, but I had no idea it was that awesome. The data set was reasonably big, 1.35 billion docs and the scenario we present is a real world one based on…

Talking about RavenDB in the Angular Show

You can hear me speaking at the Angular Show about using document database from the point of view of full stack or front end developers. In this episode, panelists Brian Love, Jennifer Wadella, and Aaron Frost welcome Oren Eini, founder of RavenDB, to the Angular Show. Oren teaches us about some of the key decisions around structured vs…

Optimizing non obvious costs

One of the “fun” aspects of running in the cloud is the fact that certain assumptions that you take for granted are broken, sometimes seriously so. Today post is about an issue a customer run into in the cloud. They were seeing some cases of high latency of operations from RavenDB. In the cloud, the usual answer is to provision more resources, but…

The Angular Show – RavenDB

Couchbase vs RavenDB: Performance at Rakuten Kobo

Rakuten Kobo evaluates Couchbase and RavenDB for their eBook enterprise app. Databases are measured by performance, cost savings, and ease of use.