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(3)  Kafka admin want to reduce the expansion times for local disk when remote storage down for a long time. after all. The already uploaded segments are eligible for deletion from broker when not enable the feature for topic.
      You can check the follow picture ( Configure: 1 day local + 3 day remote) to understand the logic: 
      (a) If the remote storage outage for a short time:  no matter if you enable the feature. it don't have difference. 
      (b) If the remote storage outage for a medium-term time (check the 24 hour' outage example in picture): 
              you You will need one extra expansion:  the max size is the your saving cost's part. You can think you should return back the save part/redundancy by expansion.
Image Added       (c) If the remote storage outage for a long time (check the 48 hours' outage example in picture)）:  
             no  No matter if  if you enable the feature. you should keep doing expansion due to remote upload failed.Image Removed

Public Interfaces

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