Ozone Manager Internals

This section documents the internal workings of the Ozone Manager.

📄️ Disk Layout

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📄️ RocksDB Schema

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📄️ In-Memory Storage

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📄️ Startup Sequence

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📄️ Roles

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📄️ Write Request Flow

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📄️ Read Request Flow

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📄️ 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.