Ozone's architectural elements are explained in the following pages. The metadata layer, data layer, protocol bus, replication layer and Recon are discussed in the following pages. These concepts are useful if you want to understand how ozone works in depth.
Ozone Manager is the principal name space service of Ozone. OM manages the life cycle of volumes, buckets and Keys.Ozone Manager
Storage Container Manager or SCM is the core metadata service of Ozone. SCM provides a distributed block layer for Ozone.Storage Container Manager
Ozone supports Amazon’s Simple Storage Service (S3) protocol. In fact, You can use S3 clients and S3 SDK based applications without any modifications with Ozone.Datanodes