Introduction
In my last blog post, Internet of Things, Messaging and MySQL, I have showed how to start your own Internet of Things with Particle Photon board. That implementation is great, but requires constant internet (wi-fi) access as the Particle Photon board does not have any local storage. If you do not have a reliable network access (i.e. in some remote places) or need something really small to store your data you can now use Intel Edison. I’ve even install MySQL on Edison, which makes it the smallest (in size) MySQL server in the world! Other options include:

• Raspberry Pi (my colleague Roel installed …

Swedish database technology ensures intergalactic research data protected “to infinity and beyond” for scientists

Stockholm, Sweden and anywhere else in the world - Severalnines, the provider of database infrastructure management software, today announced its latest customer, the European Gravitational Observatory (EGO). Severalnines’ ClusterControl platform is used to manage and monitor the operations of some of EGO’s open source databases and help scientists to track, analyse and share data gathered from research on gravitational waves.  

EGO is one of the world’s leading research structures devoted to the study of gravitational waves. EGO hosts the Virgo experiment, a project involving about 300 scientists spread across 19 laboratories in France, Italy, Poland, the …

Thanks to google’s insatiable appetite for scanning and offering documents, you can take a trip back to a 1994 issue of Computer World magazine, read about Windows NT, cc:Mail, pentium processors, and see an ad for Oracle CDE, featuring yours truly looking over his shoulder.  (Remember Oracle CDE?)  This was my first Oracle DBA gig, and the team received a …

Wikipedia says that “Relational calculus is essentially equivalent to first-order logic, and indeed, Codd’s Theorem had been known to logicians since the late 1940s.”  I couldn’t find the cited sources online, but did find these interesting papers:

“Applications of Alfred Tarski’s Ideas in Database Theory”

and

“Tarski’s influence on computer science.” (see the section starting “The final thing I want to tell something about is the connection of Tarski’s ideas and work with database theory.”)

If you’ve studied mathematical logic (or math, eg, topology), you are probably familiar with Tarski’s name.  The historical …

The call for participation for Percona Live Data Performance Conference 2016 is still open. Deadline for submission is November 29th.

There are two immediately noticeable novelties in this edition:

• The name change. Not "MySQL & Expo" but "Data Performance Conference." It makes the conference open to a broader set of topics.
• The community voting. Proposals can get evaluated by the community before the review committee takes decisions.

I think it's a good choice. Other conferences adopt the same method. The attendees choose what they want to see and hear. In this case, it's mixed method, where the community voting is used as an indication for the review committee, which, by my understanding, has the final say.

Vote for my proposals!

Below are my proposals. Clicking on the links below will …

The MariaDB CONNECT storage engine offers access to JSON file and allows you to see a external JSON file as a MariaDB table. A nice feature of the CONNECT storage Engine is its capability to auto discover a table structure when the table correspond to external data. In our case the CONNECT storage engine will automatically [...]

Introduction

Consensus is a key component to providing fault-tolerant services such as synchronously replicated data stores, non-blocking atomic commitment and Paxos and Raft are among the most popular consensus algorithms. Paxos has been widely studied by researchers while Raft has become very popular among engineers.…

A friend of mine asked me how they could automatically follow and unfollow people on Twitter. But they didn’t want to follow just anyone and everyone. He had a Twitter account which they used for recruiting in a very narrow construction industry.…

In the past four posts of the blog series, we covered deployment of clustering/replication (MySQL/Galera, MySQL Replication, MongoDB & PostgreSQL), management & monitoring of your existing databases and clusters, performance monitoring and health and in the last post, how to make your setup highly available through HAProxy and MaxScale.

So now that you have your databases up and running and highly available, how do you ensure that you have backups of …

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.1.9 and MariaDB Connector/J 1.3.2. See the release notes and changelogs for details on each release. Download MariaDB 10.1.9 Release Notes Changelog What is MariaDB 10.1? MariaDB APT and YUM Repository Configuration Generator Download MariaDB Connector/J 1.3.2 Release Notes Changelog About MariaDB Connector/J […]

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