--- title: ArangoDB Blog | Frank Celler (13) description: Frank is both entrepreneur and backend developer, developing mostly memory databases for two decades. He is the CTO and co-founder of ArangoDB. Try to challenge Frank asking him questions on C, C++ and MRuby. Besides Frank organizes Cologne’s NoSQL group & is an active member of NoSQL community. (13) --- ArangoDB 3.12 Product Release Announcement! Read the blog for details. [Read Blog](https://arangodb.com/2024/03/arangodb-3-12-performance-for-all-your-data-models/) [![logo](https://blog.arangodb.com/hs-fs/hubfs/Imported_Blog_Media/logo.png?width=301&height=50&name=logo.png "logo")](https://arango.ai) ### Why Graph [The Rise of Graph](https://arangodb.com/the-rise-of-graph/) [The Graph ML Gamechanger](https://arangodb.com/the-graph-ml-gamechanger/) [Consolidate to Graph](https://arangodb.com/graph-vs-relational/) [Graph DB Basics](https://arangodb.com/graph-database/) ### Products [Managed Graph DB](https://arangodb.com/arangograph-managedgraphdb/) [Self-Managed Graph DB](https://arangodb.com/arangograph-selfmanaged/) [Managed Graph ML](https://arangodb.com/managed-ml-graph/) [Community Edition](https://arangodb.com/community-server/) [Compare Products](https://arangodb.com/subscriptions/) ### Solutions Use Cases Industries Solution Accelerators - [Cyber/Threat Mgmt](https://arangodb.com/solutions/use-cases/cyber-threat-management/) - [Fraud Detection](https://arangodb.com/solutions/use-cases/fraud-detections/) - [Supply Chain](https://arangodb.com/solutions/use-cases/supply-chain/) - [Network Asset Management](https://arangodb.com/solutions/use-cases/network-asset-management/) - [Customer & Patient 360](https://blog.arangodb.com/solutions/use-case/customer-and-patient-360/) - [Recommendations](https://arangodb.com/solutions/use-cases/recommendations/) - [Case Management](https://blog.arangodb.com/solutions/use-case/case-management/) - [Geospatial Analysis](https://arangodb.com/solutions/use-cases/geospatial/) - [Master Data Mgmt](https://arangodb.com/solutions/use-cases/master-data-management/) - [Software & Technology](https://arangodb.com/arangodb-for-software-tech/) - [Financial Services](https://arangodb.com/arangodb-for-financial-services/) - [Tele Communication](https://arangodb.com/telecommunications-and-network/) - [E-commerce](https://arangodb.com/arangodb-for-e-commerce/) - [Healthcare](https://arangodb.com/arangodb-for-healthcare/) - [Government](https://arangodb.com/arangodb-for-government/) - [Aerospace & Defence](https://arangodb.com/arangodb-for-aerospace-defense/) - [Manufacturing](https://arangodb.com/arangodb-for-manufacturing/) - [Enterprise Knowledge Graphs](https://arangodb.com/resources/white-papers/enterprise-knowledge-graphs/) - [Entity Resolution](https://arangodb.com/entity-resolution/) - [Traceability/Lineage](https://arangodb.com/traceability-and-lineage/) - [Contexual Relevance](https://arangodb.com/contextual-relevance/) ### Developers Capabilities Integrations Differentiators - [Graph Traversals](https://arangodb.com/graph-traversals/) - [Multi-Model DB](https://arangodb.com/multi-model-db/) - [LLM + Knowledge Graph](https://arangodb.com/llm-knowledge-graph/) - [Graph ML](https://arangodb.com/managed-ml-graph/) - [Advanced Geospatial](https://arangodb.com/advanced-geospatial/) - [Document Store](https://arangodb.com/document-store/) - [Search Engine](https://arangodb.com/full-text-search-engine/) - [Security & Compliance](https://arangodb.com/security/) - [Data Masking](https://arangodb.com/Data-masking/) - [Key/Value DB](https://arangodb.com/integrated-key-value-support/) - [Clients / Languages](https://arangodb.com/clients-languages/) - [BI Tools](https://arangodb.com/bi-tools-support/) - [Containers](https://arangodb.com/container-support/) - [Community driven](https://arangodb.com/community-driven/) - [Model Flexibility](https://arangodb.com/model-flexibility/) - [Graph Scalability](https://arangodb.com/graph-scalability/) - [Performance at Scale](https://arangodb.com/performance-at-scale/) - [Highest Availability](https://arangodb.com/highest-availability/) - [Unified Query Language](https://arangodb.com/unified-query-languageaql/) - [Graph + Native Document](https://arangodb.com/graph-document/) - [Graph + Native Search](https://arangodb.com/graph-search/) - [Cost Effective](https://arangodb.com/cost-effective-development-operation/) - [Full Geospatial](https://arangodb.com/full-geospatial/) ### Customers [All Case Studies](https://arangodb.com/solutions/solutions-customers/#all) [Government & Cyber](https://arangodb.com/solutions/solutions-customers/#Government-Cyber) [Manufacturing & Supply Chain](https://arangodb.com/solutions/solutions-customers/#Manufacturing-Supply-Chain) [Healthcare & Science](https://arangodb.com/solutions/solutions-customers/#Healthcare-Science) [Retail & Commerce](https://arangodb.com/solutions/solutions-customers/#Retail-Commerce) [Technology](https://arangodb.com/solutions/solutions-customers/#Technology) [Education](https://arangodb.com/solutions/solutions-customers/#Education) [Telco](https://arangodb.com/solutions/solutions-customers/#Telco) [Financial Services](https://arangodb.com/solutions/solutions-customers/#Financial-Services) ### Learn [Documentation](https://docs.arangodb.com/stable/) [Developer Hub](https://developer.arangodb.com/) [ArangoDB University](https://university.arangodb.com/) [Blog](https://arangodb.com/blog/) [Certification](https://arangodb.com/learn/certification/) [Community](https://arangodb.com/community/) [Events](https://arangodb.com/events/) [Resources](https://arangodb.com/resources/) [Training Center](https://arangodb.com/learn/) ### Company [About Us](https://arangodb.com/about-us/) [Team](https://arangodb.com/about-arangodb/) [Partners](https://arangodb.com/partners/) [News](https://arangodb.com/news/) [Careers](https://arangodb.applytojob.com/apply) ### Pricing - Why Graph - [The Rise of Graph](https://arangodb.com/the-rise-of-graph/) - [The Graph ML Gamechanger](https://arangodb.com/the-graph-ml-gamechanger/) - [Consolidate to Graph](https://arangodb.com/graph-vs-relational/) - [Graph DB Basics](https://arangodb.com/graph-database/) - Products - [Managed Graph DB](https://arangodb.com/arangograph-managedgraphdb/) - [Self-Managed Graph DB](https://arangodb.com/arangograph-selfmanaged/) - [Managed Graph ML](https://arangodb.com/managed-ml-graph/) - [Community Edition](https://arangodb.com/community-server/) - [Compare Products](https://arangodb.com/subscriptions/) - Solutions - Use Cases - [Cyber/Threat Mgmt](https://arangodb.com/solutions/use-cases/cyber-threat-management/) - [Fraud Detection](https://arangodb.com/solutions/use-cases/fraud-detections/) - [Supply Chain](https://arangodb.com/solutions/use-cases/supply-chain/) - [Network Asset Management](https://arangodb.com/solutions/use-cases/network-asset-management/) - [Customer & Patient 360](https://arangodb.com/solutions/use-cases/customer-and-patient-360/) - [Recommendations](https://arangodb.com/solutions/use-cases/recommendations/) - [Case Management](https://arangodb.com/solutions/use-cases/case-management/) - [Geospatial Analysis](https://arangodb.com/solutions/use-cases/geospatial/) - [Master Data Mgmt](https://arangodb.com/solutions/use-cases/master-data-management/) - Industries - [Software & Technology](https://arangodb.com/arangodb-for-software-tech/) - [Financial Services](https://arangodb.com/arangodb-for-financial-services/) - [Tele Communication](https://arangodb.com/telecommunications-and-network/) - [E-commerce](https://arangodb.com/arangodb-for-e-commerce/) - [Healthcare](https://arangodb.com/arangodb-for-healthcare/) - [Government](https://arangodb.com/arangodb-for-government/) - [Aerospace & Defence](https://arangodb.com/arangodb-for-aerospace-defense/) - [Manufacturing](https://arangodb.com/arangodb-for-manufacturing/) - Solution Accelerators - [Enterprise Knowledge Graphs](https://arangodb.com/resources/white-papers/enterprise-knowledge-graphs/) - [Entity Resolution](https://arangodb.com/entity-resolution/) - [Traceability/Lineage](https://arangodb.com/traceability-and-lineage/) - [Contexual Relevance](https://arangodb.com/contextual-relevance/) - Customers - [All Case Studies](https://arangodb.com/solutions/solutions-customers/#all) - [Government & Cyber](https://arangodb.com/solutions/solutions-customers/#Government-Cyber) - [Manufacturing & Supply Chain](https://arangodb.com/solutions/solutions-customers/#Manufacturing-Supply-Chain) - [Healthcare & Science](https://arangodb.com/solutions/solutions-customers/#Healthcare-Science) - [Retail & Commerce](https://arangodb.com/solutions/solutions-customers/#Retail-Commerce) - [Technology](https://arangodb.com/solutions/solutions-customers/#Technology) - [Education](https://arangodb.com/solutions/solutions-customers/#Education) - [Telco](https://arangodb.com/solutions/solutions-customers/#Telco) - [Financial Services](https://arangodb.com/solutions/solutions-customers/#Financial-Services) - Learn - [Documentation](https://docs.arangodb.com/stable/) - [Developer Hub](https://developer.arangodb.com/) - [ArangoDB University](https://university.arangodb.com/) - [Blog](https://arangodb.com/blog/) - [Certification](https://arangodb.com/learn/certification/) - [Community](https://arangodb.com/community/) - [Events](https://arangodb.com/events/) - [Resources](https://arangodb.com/resources/) - [Training Center](https://arangodb.com/learn/) - Company - [About Us](https://arangodb.com/about-us/) - [Team](https://arangodb.com/about-arangodb/) - [Partners](https://arangodb.com/partners/) - [News](https://arangodb.com/news/) - [Careers](https://arangodb.applytojob.com/apply) - [Pricing](https://arangodb.com/download-major/pricing/) [**Start Free** ArangoGraph Cloud](https://dashboard.arangodb.cloud/signup?acceptedTermsAndConditions=1) [**Download Now** ArangoDB Enterprise](https://arangodb.com/download-arangodb-enterprise/) ![Vector-5](https://blog.arangodb.com/hubfs/Imported_Blog_Media/search.svg) ## [Comparing ArangoDB with CouchDB and MongoDB](https://blog.arangodb.com/blog/2012/11/comparing-arangodb-with-mongodb-and-couchdb) November 13, 2012 Tags: [Performance](https://blog.arangodb.com/blog/topic/performance), [General](https://blog.arangodb.com/blog/topic/general) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 6 minutes The folks over at MongoDB have an article on their site on [Comparing MongoDB and CouchDB](http://www.mongodb.org/display/DOCS/Comparing+Mongo+DB+and+Couch+DB).They write: > “We are getting a lot of questions “how are mongo db and couch different?” It’s a good question: both are document-oriented databases with schemaless JSON-style object data storage. Both products have their place — we are big believers that databases are specializing and “one size fits all” no longer applies.” The same applies to ArangoDB, we meet a lot of people especially developers using MongoDB who are interested in ArangoDB and ask us how it is different than other popular nosql.. [(more…)](https://blog.arangodb.com/blog/2012/11/comparing-arangodb-with-mongodb-and-couchdb) ## [ArangoDB 1.01 released](https://blog.arangodb.com/blog/2012/10/arangodb-1-01-released) October 01, 2012 Tags: [Releases](https://blog.arangodb.com/blog/topic/releases), [Release](https://blog.arangodb.com/blog/topic/release) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 0 minutes *This version is deprecated. [Download the new version](https://www.arangodb.com/download) of ArangoDB* [(more…)](https://blog.arangodb.com/blog/2012/10/arangodb-1-01-released) ## [20% off “nosql matters Barcelona” for ArangoDB users](https://blog.arangodb.com/blog/2012/09/20-off-nosql-matters-barcelona) September 05, 2012 Tags: [Community](https://blog.arangodb.com/blog/topic/community), [General](https://blog.arangodb.com/blog/topic/general) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 1 minutes We are on the road again and are invited to give a talk at the “[nosql matters”](http://2012.nosql-matters.org/bcn/)  in Barcelona. This is a one day conference in an [amazing looking venue](http://2012.nosql-matters.org/bcn/wp-content/uploads/2011/10/convalescencia2.jpg) (UNESCO world heritage). [(more…)](https://blog.arangodb.com/blog/2012/09/20-off-nosql-matters-barcelona) ## [Slides: Modelling data in a schema-free world](https://blog.arangodb.com/blog/2012/08/modelling-data-in-a-schema-free-world) August 27, 2012 Tags: [Community](https://blog.arangodb.com/blog/topic/community), [Presentation](https://blog.arangodb.com/blog/topic/presentation), [open-source](https://blog.arangodb.com/blog/topic/open-source) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 1 minutes We just came back from [FroSCon](https://www.froscon.de), a large, international open source conference near Bonn, Germany. Jan Steemann, one of the core developers of ArangoDB, had a talk on modelling data in a schema-free world. Jan was given the largest room in the conference for this talk, fortunately a lot of people showed up and even stayed ;-). You can find Jan’s presentation below. [(more…)](https://blog.arangodb.com/blog/2012/08/modelling-data-in-a-schema-free-world) ## [ArangoDB Client for nodejs released](https://blog.arangodb.com/blog/2012/07/arangodb-for-nodejs) July 31, 2012 Tags: [Community](https://blog.arangodb.com/blog/topic/community), [driver](https://blog.arangodb.com/blog/topic/driver), [API](https://blog.arangodb.com/blog/topic/api), [nodejs](https://blog.arangodb.com/blog/topic/nodejs) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 1 minutes **Note: Our new official nodejs driver is [arangojs](https://github.com/arangodb/arangojs). You also can look at [this blogpost about the new driver](https://blog.arangodb.com/blog/2015/05/arangodb-javascript-driver-3-7-promises-and-performance).** We got a note from Anders Elo from Sweden. He told us that he has released a ArangoDB client for node.js. Awesome! 🙂 You can find it on Github under the URL [https://github.com/kaerus/arango-client](https://github.com/kaerus/arango-client). To install locally [(more…)](https://blog.arangodb.com/blog/2012/07/arangodb-for-nodejs) ## [Infographic – comparing the disk space usage of MongoDB, CouchDB and ArangoDB](https://blog.arangodb.com/blog/2012/07/infographic-comparing-space-usage-mongodb-couchdb-arangodb) July 11, 2012 Tags: [Performance](https://blog.arangodb.com/blog/topic/performance) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 0 minutes As a follow-up of Jan’s [blog post](https://blog.arangodb.com/blog/2012/07/collection-disk-usage-arangodb/) we have extracted some central figures and created this infographic for your reference. [(more…)](https://blog.arangodb.com/blog/2012/07/infographic-comparing-space-usage-mongodb-couchdb-arangodb) ## [MRuby Links](https://blog.arangodb.com/blog/2012/07/mruby-links) July 02, 2012 Tags: [Application Server](https://blog.arangodb.com/blog/topic/application-server), [Ruby](https://blog.arangodb.com/blog/topic/ruby) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 1 minutes I’ve started the following collection of links, example code, projects, and articles about mruby. This list is most likely not complete, if you have other interesting articles please let me know. Especially sample code and mruby projects. [(more…)](https://blog.arangodb.com/blog/2012/07/mruby-links) ## [CRuby vs MRuby FAQ](https://blog.arangodb.com/blog/2012/06/cruby-vs-mruby-faq) June 24, 2012 Tags: [Ruby](https://blog.arangodb.com/blog/topic/ruby) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 1 minutes At our last Ruby user group meeting it was asked, what the differences between CRuby and MRuby are. @junjis0203 wrote a MRuby [FAQ](https://github.com/mruby/mruby/wiki/Mrbgems-FAQ). Unfortunately, it’s in Japanese. I’ve tried to translate it using http://www.excite.co.jp/world/english/ & Google translate and added my own findings. ### Not all classes and method from CRuby are available in MRuby MRuby does not guarantee to implement the features which are defined in ISO / IEC 30170 ### Regular Expression Mruby allows you to switch features on or off depending on your needs and available space. These features are defined in “include/mrbconf.h”. One of.. [(more…)](https://blog.arangodb.com/blog/2012/06/cruby-vs-mruby-faq) ## [“Use-Cases for MRuby in a Database like ArangoDB” or “Can MRuby be the next PL/SQL?”](https://blog.arangodb.com/blog/2012/06/use-cases-for-mruby-in-database-contexts-or-can-mruby-be-the-next-plsql) June 10, 2012 Tags: [Ruby](https://blog.arangodb.com/blog/topic/ruby), [NoSQL](https://blog.arangodb.com/blog/topic/nosql) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 3 minutes In the relational world, PL/SQL is used to store business/application logic inside the relational database. The same movement is currently happening in the NoSQL. Redis for example uses LUA script in its newest version (2.6), to allow developers to tweak Redis. There a lot of use-cases for a programming language in document-stores. Programming languages are used in various document stores like ArangoDB, CouchDB, MongoDB, or VoltDB. In my opinion in the following use-cases a suitable language like Ruby will be most handy. [(more…)](https://blog.arangodb.com/blog/2012/06/use-cases-for-mruby-in-database-contexts-or-can-mruby-be-the-next-plsql) ## [HTTP Client for MRuby](https://blog.arangodb.com/blog/2012/05/http-client-mruby) May 26, 2012 Tags: [Ruby](https://blog.arangodb.com/blog/topic/ruby), [HTTP](https://blog.arangodb.com/blog/topic/http) ![](https://blog.arangodb.com/hubfs/ArangoDB-Blog/clock.svg)Estimated reading time: 2 minutes As Dorthe pointed out, we are on the road for the [next two weeks](https://blog.arangodb.com/blog/2012/05/meet-us-at-nosql-matters-berlin-buzzwords-or-euruko). So, I thought it might be a good idea to put everything together. In the last blog posts, I described - how to [wrap a C / C++ structure](https://blog.arangodb.com/blog/2012/04/using-mruby-as-alternative-to-server-side-javascript) - how to define [Ruby classes](https://blog.arangodb.com/blog/2012/05/json-parser-for-mruby-or-how-to-define-classes-and-exceptions-in-c/) and [functions](https://blog.arangodb.com/blog/2012/04/preliminary-performance-tests-for-mruby-and-v8/) in C - construct a interactive [REPL](https://blog.arangodb.com/blog/2012/04/towards-an-interactive-mruby-shell/) [(more…)](https://blog.arangodb.com/blog/2012/05/http-client-mruby) [«](https://blog.arangodb.com/blog/author/frank-celler/page/12) [1](https://blog.arangodb.com/blog/author/frank-celler/page/1) [...](https://blog.arangodb.com/blog/author/frank-celler/page/8) [11](https://blog.arangodb.com/blog/author/frank-celler/page/11) [12](https://blog.arangodb.com/blog/author/frank-celler/page/12) [13](https://blog.arangodb.com/blog/author/frank-celler/page/13) [14](https://blog.arangodb.com/blog/author/frank-celler/page/14) [15](https://blog.arangodb.com/blog/author/frank-celler/page/15) [»](https://blog.arangodb.com/blog/author/frank-celler/page/14) Get the latest tutorials, blog posts and news: Tags - [General](https://blog.arangodb.com/blog/topic/general) - [Release](https://blog.arangodb.com/blog/topic/release) - [Community](https://blog.arangodb.com/blog/topic/community) - [Releases](https://blog.arangodb.com/blog/topic/releases) - [Performance](https://blog.arangodb.com/blog/topic/performance) - [Tutorial](https://blog.arangodb.com/blog/topic/tutorial) - [Foxx](https://blog.arangodb.com/blog/topic/foxx) - [AQL](https://blog.arangodb.com/blog/topic/aql) - [API](https://blog.arangodb.com/blog/topic/api) - [Newsletter](https://blog.arangodb.com/blog/topic/newsletter) - [Cluster](https://blog.arangodb.com/blog/topic/cluster) - [Graph](https://blog.arangodb.com/blog/topic/graph) - [Graphs](https://blog.arangodb.com/blog/topic/graphs) - [Documentation](https://blog.arangodb.com/blog/topic/documentation) - [Javascript](https://blog.arangodb.com/blog/topic/javascript) - [Query Language](https://blog.arangodb.com/blog/topic/query-language) - [Architecture](https://blog.arangodb.com/blog/topic/architecture) - [NoSQL](https://blog.arangodb.com/blog/topic/nosql) - [Enterprise](https://blog.arangodb.com/blog/topic/enterprise) - [Ruby](https://blog.arangodb.com/blog/topic/ruby) - [RocksDB](https://blog.arangodb.com/blog/topic/rocksdb) - [testing](https://blog.arangodb.com/blog/topic/testing) - [ArangoML](https://blog.arangodb.com/blog/topic/arangoml) - [Machine Learning](https://blog.arangodb.com/blog/topic/machine-learning) - [Benchmark](https://blog.arangodb.com/blog/topic/benchmark) - [Java](https://blog.arangodb.com/blog/topic/java) - [driver](https://blog.arangodb.com/blog/topic/driver) - [multi-model](https://blog.arangodb.com/blog/topic/multi-model) - [geo](https://blog.arangodb.com/blog/topic/geo) - [how to](https://blog.arangodb.com/blog/topic/how-to) - [Drivers](https://blog.arangodb.com/blog/topic/drivers) - [PHP](https://blog.arangodb.com/blog/topic/php) - [Security](https://blog.arangodb.com/blog/topic/security) - [nodejs](https://blog.arangodb.com/blog/topic/nodejs) - [python](https://blog.arangodb.com/blog/topic/python) - [ArangoSearch](https://blog.arangodb.com/blog/topic/arangosearch) - [Kubernetes](https://blog.arangodb.com/blog/topic/kubernetes) - [Presentation](https://blog.arangodb.com/blog/topic/presentation) - [open-source](https://blog.arangodb.com/blog/topic/open-source) - [Future-of-nosql](https://blog.arangodb.com/blog/topic/future-of-nosql) - [GitHub](https://blog.arangodb.com/blog/topic/github) - [ARM: Raspberry + Co.](https://blog.arangodb.com/blog/topic/arm-raspberry-co-) - [Fraud Detection](https://blog.arangodb.com/blog/topic/fraud-detection) - [Managed Service](https://blog.arangodb.com/blog/topic/managed-service) - [arangosh](https://blog.arangodb.com/blog/topic/arangosh) - [C++](https://blog.arangodb.com/blog/topic/c) - [Cloud](https://blog.arangodb.com/blog/topic/cloud) - [Conferences](https://blog.arangodb.com/blog/topic/conferences) - [Data Science](https://blog.arangodb.com/blog/topic/data-science) - [HTTP](https://blog.arangodb.com/blog/topic/http) - [ML](https://blog.arangodb.com/blog/topic/ml) - 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