I know removal of mapping types in v7: https://www.elastic.co/guide/en/elasticsearch/reference/master/removal-of-types.html#_schedule_for_removal_of_mapping_types
But _type is now all _doc
We use "_type" field very much as filter in kibana to look at data from a specific file.
I know I can use an index pattern with only the given file (cumpersome have 10K files)
Or I can add a doctype field which holds the old mapping types.
But this has been a fundamental part of Kibana filtering as long as I've used it. So there must be a way of doing this without having to rewrite all my inserter-daemons.