The fuss in the Datawarehousing world is will Big Data kill the existing ETL tools. The answer is a big "NO".
Big Data with the combination of ETL will pave the way for easy reporting and data maintenance. While the way the ETL tools being used will undergo a huge change with most of the open source Java Platform based tools coming into picture. The biggest tool in the ETL space which is going to huge as per the research is Talend.
If ever anyone wants to learn a new ETL tool go for TALEND