I need to copy data from old ElasticSearch (v. 1.1.1) to other server running ver. 6.2.
I have no physical access to old server, but it doesn't have any security (X-Pack) installed, so I can easily navigate thru data with REST. I have full root access to destination server running ElasticSearch 6.2.
I'm really confused searching for answers, looks like too many ways to do it: (reindex, backup, elasticdump, etc).
What is the best way to do it?
The source server has single index with 16 different documents mapped, (so "manual" mapping would be complicated).