Hi I am beginner in hadoop , I installed two HortonWorks sandbox in 2 differents servers in default mode ( as-is standalone mode). Every thing seems working. My next step is to join these two servers under ( a cluster) onde NameNode. with two data Node. Can I do that just with ambari interface ( the admin accompt is working in both servers) ? which service Can I keep running in two servers ? Please any tutorial ou documentation to help me ? Thanks in advance. ... View more