How have Hadoop deployments grown this year? Slowly.
Here’s a little anecdata for you:
During 2014, my colleague Nick Heudecker and I conducted quarterly webinars on the State of Hadoop, and in the Q2, Q3 and Q4 sessions we asked our (steadily growing) audience about their deployments via online polls. These results should not be considered definitive (they’re unqualified – though attendees do have to jump through a hoop or two to attend, we don’t keep extensive firmographics, titles, etc.)
See the data on my Gartner blog here.