re: Facebook Exec: Databases, Hadoop Belong Together
A lot of relational database fans are Tweeting with satisfaction that this article offers evidence that Hadoop will not replace RDBMS. I don't think knowledgeable Hadoop fans ever made that claim. Cloudera's "center is shifting" argument, for example, never asserted that RDBMSs would go away. That company's latest "Enterprise Data Hub" spin (which echoes the Sears/Metascale vision) sees Hadoop handling all the raw data at high scale. RDBMS becomes a "specialized" warehouse/mart environment for fast analysis of refined, structured data. In other words, think marts and focused operational data warehouses.
The one RDBMS concept that goes away if the Enterprise Data Hub vision takes hold is the all-encompassing enterprise data warehouse (EDW). EDWs mostly fell short of that "enterprisewide" vision, despite costly and time-consuming effort. Keeping up with variable, ever-changing data is something that the RDBMS just doesn't do well. And trying to do it at high scale with an RDBMS is an expensive proposition.