Jason Rutherglen wrote:

Is there a reason ReaderCommit in DirectoryIndexReader.getIndexCommit() does not support delete?

I think we are getting away from using IndexReader to make changes to the index, so, I didn't want to enable deleting a commit point from IndexReader.

Is is proper behavior to use SnapshotDeletionPolicy and then keep the IndexCommit around?

Likely not really. If you intend to keep the commit around indefinitely you should use a better matched deletion policy that keeps track, over time, of what should not be deleted. EG SnapshotDeletionPolicy does not save to disk which commit points are still held open.

What is the difference where the former does not support delete?

Not sure what you're asking here?

Mike

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