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When and how to use sparse indexes in ArangoDB 2.5
This version is deprecated. Download the new version of ArangoDB In ArangoDB 2.5, hash and skiplist indexes can optionally be made sparse. Such sparse indexes will exclude documents in which at least one of the index attributes is either not set or has a value of null. Declaring an index as sparse can provide great…
ArangoDB 2.5 Beta: Test New Features & Enhancements
This version is deprecated. Download the new version of ArangoDB The current sprint comes to an end and ArangoDB 2.5 is available as beta. We appreciate your feedback and hope that many developers try this new beta release. We have used the last weeks to improve the Foxx framework for data-centric microservices – enhancing debug…
ArangoDB at NoSQL Matters Paris: Insights & Innovations
If you are interested in NoSQL and come from France, the NoSQL matters conference in Paris is your place to go. ArangoDB contributes with a workshop and a talk and is a silver sponsor of the conference as well. You can meet our team at the exhibition space and ask your ArangoDB questions in person….
ArangoDB in San Francisco: Exciting Developments & Events
Join parts of the ArangoDB team in San Francisco. Max and Claudius are visiting the Bay Area from mid-February till end of March. Starting with the StrataConf in San Jose, Feb 17–20, 2015 Max and Claudius want to meet people, start cooperations, visit meetups and tell people in the Bay Area about ArangoDB. If you…
Comparison: Lockless programming with atomics in C++ 11 vs. mutex and RW-locks
ArangoDB is multithreaded and able to use several CPU-cores at once. Because of that access to common data structures to these threads have to be protected from concurrent access. ArangoDB currently uses mutexes, spinlocks and RW-locks for that. With the ongoing development of the MVCC the number of situations where protected access is needed grows…
ArangoDB 2.4.3 Release: Bug Fixes and Enhancements
This version is deprecated. Download the new version of ArangoDB A maintenance release for ArangoDB 2.4 is available for download or via your favorite package manager. v2.4.3 (2015-02-06) fix multi-threading with openssl when running under Windows fix timeout on socket operations when running under Windows Fixed an error in Foxx routing which caused some apps…
ArangoDB Logstash Output: Efficient Data Integration
Inspired by a question on StackOverflow, I did some investigation about how to make Logstash send log events to ArangoDB. There is no dedicated Logstash output plugin for ArangoDB on the Logstash plugins page, so I had already accepted to write one on my own. Browsing the plugins page for inspiration, I found an HTTP…
Dynamic Attribute Names in AQL: ArangoDB Techniques
On our mailing list, there is quite often the question whether attribute names in objects returned from AQL queries can be made dynamic. Jan discusses in his blog how such dynamic attribute names could be expressed and shows the current implementation that comes with ArangoDB 2.5 – adapting an ES6 proposal that might bring robust…
ArangoDB Optimizer Rule: Efficient Calculations
In the upcoming ArangoDB 2.5 (current devel branch) a new optimizer rule move-calculations-down was added. Jan showcases in his latest blog post how queries with calculations could benefit from this new optimiser rule. Read in Jan’s blog how this rule could accelerate your queries
ArangoDB 2.4.2
This version is deprecated. Download the new version of ArangoDB A maintenance release for ArangoDB 2.4.2 is available for download or via your favourite package manager. v2.4.2 (2015-01-30) added custom visitor functionality for AQL traversals This allows more complex result processing in traversals triggered by AQL. A few examples are shown in this article. improved…