Ozone Manager Internals

This section documents the internal workings of the Ozone Manager.

📄️ Disk Layout

Overview

📄️ RocksDB Schema

This page describes the RocksDB layout used by the Ozone Manager (OM). The OM persists namespace and related metadata in RocksDB: volumes, buckets, keys, S3-style multipart uploads, snapshots, tenancy, and supporting system state.

📄️ High Availability

Ozone has two metadata-manager nodes (Ozone Manager for key space management and Storage Container Manager for block space management) and multiple storage nodes (Datanode). Data is replicated between Datanodes with the help of RAFT consensus algorithm.