With the tool esload I was able to load in 12h approximately 500GB/2.2b of documents (New Line Json Delimited).
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.14MB) in 1.10s (5.60MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.09MB) in 0.94s (6.47MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.20MB) in 0.96s (6.47MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.13MB) in 0.99s (6.20MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.17MB) in 0.88s (7.02MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.16MB) in 2.23s (2.76MB/s)
INFO loader.py:index:105 uploaded 80000 documents (errors: n/a) (6.12MB) in 0.92s (6.67MB/s)
Start after work, over night it will do the job.