sijie commented on pull request #6787:
URL: https://github.com/apache/pulsar/pull/6787#issuecomment-619795865


   > A file system is also operating within system constraints. When the disk 
(or user quota) is full, some actions will have to be taken.
   
   Correct. But the semantic is still maintained. The file is not deleted until 
the file description is closed.
   
   If a reader is active on a stream, the data after the reader position 
shouldn't be deleted. I think this is the minimum requirement that a reader 
should provide. Again, I am fine with introducing this change. But a flag 
should be added to enable this and the default behavior is that the data 
shouldn't be removed if there is a reader is active.


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