MongoDB is an open source, document-oriented NoSQL database system. NoSQL are those databases that differ from the classic model SQL traditional. The term "NoSQL" was first used in 1998, when it was coined by Carlo Strozzi. The advantages they present compared to normal SQL are their greater horizontal scalability, not generating bottlenecks, handling huge amounts of data, they do not need expensive clusters, etc.
MongoDB comes from the English "humongous" written in C ++ and released under license Apache. On the project website you can find binaries for different operating systems, Linux, FreeBSD, Windows, OS X and Solaris. Since its launch in 2009, its development has reached the stable version 2.4.4, although the development version 2.5.0 is already prepared.
Between the idioms supported by this base are C ++, C #, Erlang, Java, Haskell, Lisp, PHP, Perl, Python, Ruby, Scala, JavaScript, etc. The speed and performance, as well as the support of all these languages make MongoDB NoSQL a good alternative for more and more companies.
More information - RedHat has not yet decided between MariaDB and MySQL
Source - linuxlinks
Why is the image from MariaDB?
I also have the same doubt, because of the image is it from mariadb?