[GitHub] [iceberg] RussellSpitzer edited a comment on issue #2793: Does 'expireSnapshots' also remove data files ?

[GitBox <gi...@apache.org>]

RussellSpitzer edited a comment on issue #2793:
URL: https://github.com/apache/iceberg/issues/2793#issuecomment-876060678


   The ExpireSnapshots action removes all data files and manifests which are no longer reachable once the expired snapshots have been removed.
   
   RemoveOrphanFiles compares the current reachable set of files with all the files in the table's location and removes any that are not referenced by the Iceberg table.
   
   So expire snapshots should never remove any files unless they were once part of an Iceberg table and have become unreachable. This will never delete other files.
   
   RemoveOrphans will remove any files in the table location, regardless of whether they were once part of the table or just happen to be in that location.
   
   In both cases these actions will physically delete the files they believe are no longer needed.


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