Ansible playbooks to deploy Ceph, the distributed filesystem
...The Ansible inventory file defines the hosts in your cluster and what roles each host plays in your Ceph cluster. The default location for an inventory file is /etc/ansible/hosts but this file can be placed anywhere and used with the -i flag of ansible-playbook. You must have a playbook to pass to the ansible-playbook command when deploying your cluster. There is a sample playbook at the root of the ceph-ansible project called site.yml.sample. This playbook should work fine for most usages, but it does include by default every daemon group which might not be appropriate for your cluster setup.
...well the use cases will be different from user to another. In my case, it helps with accessing my slightly damaged old USB external hard drive after a mount in unix-like OSes without any i/o issues. Another one is, loop resetting my USB headset solves some weird glitching sound i constantly have while using them. Those are my special use cases. There most be more, that it can help with.
Transparent file encryption performs real-time I/O encryption and decryption of the files in any block data with 16 bytes. The encryption uses a 256 bits symmetric key to encrypt or decrypt the data with AES encryption algorithm. Auto file encryption protects data "at rest", meaning the transparent data and files encryption. It provides the ability to comply with policies which can be applied by users, processes and file type.