Teradata Q1 disappoints. Actian acquires ParAccel. And more.

For 451 Research clients: Acquisitive Actian adds ParAccel to its growing database portfolio bit.ly/YgeY7k

— Matt Aslett (@maslett) April 29, 2013

For 451 Research clients: Tokutek releases TokuDB database storage engine as open source bit.ly/102xsSW

— Matt Aslett (@maslett) May 1, 2013

For 451 Research clients: Codership replicates partnership success with Galera Cluster for MySQL bit.ly/15dI8Hh

— Matt Aslett (@maslett) May …

Pivotal launches. SkySQL and Mony Program merge. And much, much more

Our report on the changes in the MySQL ecosystem is now available for 451 clients and non-clients alike at bit.ly/451mysql

— Matt Aslett (@maslett) April 25, 2013

For 451 Research clients: VMware expands Serengeti’s horizons with updated Hadoop virtualization project bit.ly/17muQFI

— Matt Aslett (@maslett) April 26, 2013

For 451 Research clients: SkySQL, Monty Program merge to support MariaDB following formation of MariaDB Foundation bit.ly/10dsdjf

— Matt Aslett (@maslett) …

TempoDB’s timely DBaaS for the Internet of Things. ScaleBase 2.0. And more

For 451 Research clients: TempoDB has timely database service for the Internet of Things bit.ly/YcQuqA

— Matt Aslett (@maslett) February 13, 2013

For 451 Research clients: ScaleBase provides centralized management of distributed MySQL databases bit.ly/YcQTcs

— Matt Aslett (@maslett) February 13, 2013

For 451 Research clients: XtremeData turns its attention to cloud-based data warehousing bit.ly/XB7MLY

— Matt Aslett (@maslett) …

As well as contributing to the CAOS research practice here at The 451 Group I am also part of the information management team, with a focus on databases, data caching, CEP, and - from the start of this year - data warehousing.

I’ve covered data warehousing before but taking a fresh look at this space in recent months it’s been fascinating to see the variety of technologies and strategies that vendors are applying to the data warehousing problem. It’s also been interesting to compare the role that open source has played in the data warehousing market, compared to the database market.

I’m preparing a major report on the data warehousing sector, for publication in the next couple of months. What follows is a rough outline of the role open source has played in the sector. Any comments or corrections much appreciated:

Unlike other …