PostgreSQL 11- Bruce Momjan
PostgreSQL benefits from over 20 years of open source development and has become the preferred open source relational database for developers. PostgreSQL 11 was released on October 18. It provides users with improvements to overall performance of the database system, with specific enhancements associated with very large databases and high computational workloads.
MongoDB 4.0- Alexander Rubin
Do you love MongoDB? With version 4.0 you have a reason to love it even more! MongoDB 4.0 adds support for multi-document ACID transactions, combining
the document model with ACID guarantees. Through snapshot isolation, transactions provide a consistent view of data and enforce all-or-nothing execution to maintain data integrity. And not only transactions - MongoDB 4.0 has more exciting features like non-blocking secondary teads, improved sharding, security improvements and more.
MariaDB 10.3- Arjen Lentz
MariaDB benefits from a thriving community of contributors. The latest release, MariaDB 10.3, provides several new features not found anywhere else, as well backported and reimplemented features from MySQL."
Bruce Momjian is co-founder and core team member of the PostgreSQL Global Development Group, and has worked on PostgreSQL since 1996. He has been employed by EnterpriseDB since 2006. He has spoken at many international open-source conferences and is the author of PostgreSQL: Introduction and Concepts, published by Addison-Wesley. Prior to his involvement with PostgreSQL, Bruce worked as a consultant, developing custom database applications for some of the world's largest law firms. As an academic, Bruce holds a Masters in Education, was a high school computer science teacher, and lectures internationally at universities.
Alexander joined Percona in 2013. Alexander worked with MySQL since 2000 as DBA and Application Developer. Before joining Percona he was doing MySQL consulting as a principal consultant for over 7 years (started with MySQL AB in 2006, then Sun Microsystems and then Oracle). He helped many customers design large, scalable and highly available MySQL systems and optimize MySQL performance. Alexander also helped customers design Big Data stores with Apache Hadoop and related technologies.
Arjen Lentz is an old hand from the early and golden MySQL AB eras. After the acquisition of his company Open Query, he is now once again accumulating jetlag. This time as CEO of the MariaDB Foundation, eager to meet people the world over and talk about the MariaDB ecosystem.