What is big data?
Every day, we create 2.5 quintillion bytes of data — so much that 90% of the data in the world today has been created in the last two years alone.
Consider the following statistic from a recent report from McKinsey & Co.: By 2009, large companies—with 1,000 employees or more—already had 200 terabytes of data stored about all facets of their consumers’ lives.
Consider social media and big data explosion discussed here.
And finally comparing
Comparing SAP HANA with Apache Hadoop
Comparing SAP HANA with Oracle Exalytics
and IBM's big data platform for enterprises.