create table emr_instance_group_detailses (
  emr_instance_type text not null,
  instance_count integer not null,
  aws_market ,
  ebs_volume_size integer
);
comment on table emr_instance_group_detailses is '
  Additional configuration for Master/Core/Task EMR instance Groups.
';

comment on column emr_instance_group_detailses.ebs_volume_size is '
  optional EBS volume in GB to attach to the emr instance, for simplicity only one volume for the given size and type gp2 will be created.
';