We are trying to setup Elastic Search Server in the Production with the 3 nodes ( 1 Master and 2 Data Node) with 1 TB and 64 GB Ram each, and I would like to know which Operating System would give better performance. We have Windows 2012 R2, Windows- 7 and Ubuntu. And also we are in talks with EU Elastic Team to get on the x-pack. Would someone please suggest. Thanks !