github.com/greenboxal/deis@v1.12.1/docs/_includes/_ceph-dependency-description.rst (about)

     1  The Deis :ref:`control-plane` makes use of `Ceph`_ to provide persistent storage for
     2  the :ref:`registry`, :ref:`database`, and :ref:`logger` components. The additional
     3  operational complexity of Ceph is tolerated because of the need for persistent
     4  storage for platform high availability.
     5  
     6  Alternatively, persistent storage can be achieved by running an external S3-compatible
     7  blob store, PostgreSQL database, and log service. For users on AWS, the convenience
     8  of Amazon S3 and Amazon RDS make the prospect of running a Ceph-less Deis cluster
     9  quite reasonable.
    10  
    11  Running a Deis cluster without Ceph provides several advantages:
    12  
    13  * Removal of state from the control plane (etcd is still used for configuration)
    14  * Reduced resource usage (Ceph can use up to 2GB of RAM per host)
    15  * Reduced complexity and operational burden of managing Deis
    16  
    17  .. _`Ceph`: http://ceph.com/