The ArangoDB team gave me an opportunity to write a tutorial about arangochair. Arangochair is the first attempt to listen for changes in the database and execute actions like pushing a document to the client or execute an AQL query. Currently it is limited to single nodes.

This tutorial is loosely based on the example at baslr/arangochair-serversendevents-demo

arangochair is a Node.js module hosted on npm which make it fairly easy to install. Just runnpm install arangochair and its installed.

With the release of the initial alpha of ArangoDB version 3.2 we also include the preview of the new export tool arangoexport. Alpha2 of ArangoDB 3.2 can be downloaded here. An export functionality was initially requested by one of our community members to view an ArangoDB graph view the Cytoscape visualizer.

Arangoexport is capable of exporting a graph or certain collections of a graph to xgmml, Cytoscape’s graph format. But arangoexport is not limited to this. It can also generate JSON or JSONL data exports of arbitrary collections.

The 3.0 release of ArangoDB will introduce a completely overhauled cluster and marks a major milestone on its road to “zero-maintenance” where you can keep focus on your product instead of your datacenter.

Synchronous replication

Earlier releases of ArangoDB already featured asynchronous replication. This was already a great method to do backups and allowed for failover in case of a disaster. However that was mostly a manual job and furthermore – due to its asynchronous nature – data loss could happen.

With the release of ArangoDB 3.0 the cluster will feature synchronous replication. When..

ArangoDB is now an Official Repo in the Docker Hub, one of just four additions in the last 2 months. Please try and tell your friends! ArangoDB 2.6 is known as a performance release and we’ve continued to improve the core by killing locks and optimizing code. Looks like we can show some impressive performance boosts soon. Furthermore, Mike Williamson wrote a blog post on modeling data with ArangoDB last week, that is worth to read.

Follow ArangoDB on LinkedIn and add ArangoDB as a skill. We would appreciate your help. Keep an eye on our blog or follow us on Twitter for news about ArangoDB.

Maybe you’ve noticed that there was no ArangoDB newsletter last week. So here’s the news of the last two weeks and the announcement that during the summer our NL will be biweekly. 🙂

In the meantime we’ve improved the performance of the shortest path implementation significantly and rerun the Multi-Model performance tests. The article Data modeling with multi-model databases – a use case for multi-model databases – was a huge success on O’Reilly Radar last week, it had the most page views of all Radar articles. It’s worth to read.

Finally, Mesosphere launched it’s SDK and developer program..

This week we published a 2.6.1 maintenance release. A few weeks ago we published a performance comparison. Since it has raised a lost of interest and the discussions around it have led to improvements in all products we’ve updated the benchmark comparison .In addition we’ve also released a performance comparison between ArangoDB 2.5 and 2.6.Stay tuned and follow @arangodb for more news.

The first maintenance release for ArangoDB 2.6 is available for download. This maintenance release is only relevant for Mac, Windows and the Raspberry.

In this article I want to explain how to setup a nonce-microservice using docker.

Nonce are one-time tokens that are used to ensure that an action can only be taken once. In a project, we needed to ensure that a pay button is only pressed once. Note that nonces are not used to sign requests or identify a user. This is a separate mechanism.

ArangoDB contains a nonce implementation which is a variation of Bloom-filters. It allows to store nearly unlimited nonces within a limited amount of memory. Nonce are allowed to age, that is after an hour they might expire. If there is sufficient interest,..

This week we’ve finally released ArangoDB 2.6! Try it out and we would love to see some feedback. Look at our list of important changes in the API for 2.6 if you are one of ArangoDB’s developers.Alan talked about Getting Started with Foxx in ArangoDB 2.6 in our webinar. If you didn’t had the chance to be there, you can watch it on our youtube channel.Stay tuned and follow @arangodb for more news.

TL;DR: Our initial benchmark has raised a lot of interest. Initially we wanted to show that multi-model can compete with other solutions. Due to the open and competitive way we have conducted the benchmark, the discussions around it have lead to improvements in all products, better algorithms, faster drivers and better ways to use the databases.

General Setup

From the outset we published all code and data and asked the vendors of all tested products as well as the general public, not only to run..