Hadoop and Vertica: The Data Analytics Platform at Twitter zite.to/1706rZl
There has been lots of consolidation in the database space recently with EMC acquiring Greenplum, IBM acquiring Netezza, and now HP acquires Vertica. Check out the Techcrunch article for the details.
Vertica has been touting the values of the columnar data store over the more traditional row structure of a database. Now Greenplum is offering its own column structure. The twist is that Greenplum allows for both row and column structures within the same database. Check out more information in this DBMS2 article.