Docker Storage Driver
Docker Storage Driver By default, ubuntu use AUFS storage driver for dockers and Redhat use Devicemapper.
Posts
Linux IO scheduler Options
http://searchdatacenter.techtarget.com/tip/Consider-these-Linux-I-O-scheduler-options-for-storage-performance?utm_content=control&utm_medium=EM&asrc=EM_ERU_76939074&utm_campaign=20170511_ERU%20Transmission%20for%2005/11/2017%20(UserUniverse:%202368052)&utm_source=ERU&src=5634082
Openldap configuration
http://linoxide.com/linux-how-to/setup-openldap-multi-master-replication-centos-7/