Ozone topology awareness
Ozone can use topology-related information like rack placement to optimize read and write pipelines.
To get a full rack-aware cluster, Ozone requires the following configurations:
- Ozone-configured topology hierarchy information.
- Write path configuration: When Ozone chooses 3 datanodes for a specific pipeline for the open container (WRITE), topology information can be used.
- When Ozone reads a Key, Ozone should prefer to read from the closest node.
- Container replication configuration: When Ozone Container Balancer or Replication Manager wants to move or replicate a replica of a closed container, topology information can be used.
For more information on Open vs Closed containers, see the Containers documentation.