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From Michael McCandless <>
Subject Re: ReaderCommit
Date Sun, 22 Jun 2008 19:30:54 GMT

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  

> 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?


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