http://docs.ceph.com/docs/giant/cephfs/hadoop/
https://indico.cern.ch/event/524549/contributions/2185930/attachments/1290231/1921189/2016.06.13_-_Spark_on_Ceph.pdf
http://www.ibm.com/developerworks/cn/opensource/os-cn-spark/
hadoop on ceph
https://www.mellanox.com/related-docs/whitepapers/wp_hadoop_on_cephfs.pdf
http://noahdesu.github.io/2015/07/12/hadoop-ceph-diving-in.html
https://users.soe.ucsc.edu/~carlosm/Papers/eestolan-nsdi10-poster.pdf