Limitations of Diskless Topics
Diskless topics are compatible with Kafka APIs and clients, with some limitations:
- Transactions are not supported for produce or consume operations.
- Compacted topics are not supported.
- Kafka Streams state stores are not supported. Stream processing can read from diskless topics but must write to classic topics.
- Classic and tiered Kafka topics cannot be converted to diskless topics.
Aiven-managed PostgreSQL® service upgrades
Aiven monitors the PostgreSQL® service that supports diskless topics in Bring Your Own Cloud (BYOC) deployments. This Aiven-managed service stores metadata used by the Batch Coordinator, such as offsets and batch locations. When the service experiences high load, Aiven upgrades its plan to maintain performance and stability.
- The upgrade does not cause downtime.
- You receive an email notification when the upgrade occurs.
- The upgraded plan appears in your billing and usage metrics.
- No action is required.
For details about the Batch Coordinator and metadata, see Architecture.