mount /data to host mount to bypass docker layering, to achieve best throughput on data services

prototype.txt

# 1 - copy the contents of /data from within the image onto the host share
docker run \
  -it \
  --rm \
  -v /var/nanobox/test-volume:/host \
  nanobox/mysql \
  bash -c "cp -a /data/* /host"
  
# 2 - run the real container with the host mount at /data
docker run \
  -it \
  --rm \
  -v /var/nanobox/test-volume:/data \
  nanobox/mysql \
  ls /data
  
# 3 - measure disk usage from directly from the host
du -sch /var/nanobox/test-volume | grep total | awk '{print $1}'