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Trade-offs and limitations

The main trade-off of tiered storage is the higher latency when accessing and reading data from remote storage compared to local disk storage.

Adding local caching can partially mitigate this issue, but it cannot eliminate the latency entirely.

Limitations​

  • Tiered storage does not support compacted topics.
  • After tiered storage is enabled, you cannot disable it. As a workaround to keep all data locally, set the local retention to -2 (the default value).For further assistance, contact Aiven support.
  • Increasing the local retention threshold does not move segments already uploaded to remote storage back to local storage. This change only affects new data segments.
  • If tiered storage is enabled, you cannot migrate the service to a different region or cloud, except to a virtual cloud in the same region. For migration assistance, contact Aiven support.
  • Tiered storage is only available on AWS, GCP, and Azure.
  • If you power off your service with tiered storage enabled, you will permanently lose all remote data. Charges for tiered storage are not applicable while the service is off.
  • Tiered storage is not available on all plans and regions. Check the plans and pricing page for supported plans and regions.