scan and scroll, write to file
scan and scroll, write to file

chrismattmann/dig-elasticsearch,svebk/dig-elasticsearch,usc-isi-i2/dig-elasticsearch,svebk/dig-elasticsearch,usc-isi-i2/dig-elasticsearch,chrismattmann/dig-elasticsearch,chrismattmann/dig-elasticsearch,svebk/dig-elasticsearch,usc-isi-i2/dig-elasticsearch