Drill Cluster without HDFS/MapR-FS?

[Matt]

I have seen some posts in the past about Drill nodes mounted "close to 
the data", and am wondering if its possible to use Drill as a cluster 
without HDFS?

Using ZK would not be an issue in itself, and there are apparently 
options like https://github.com/mhausenblas/dromedar

Any experiences with this?