vigyasharma commented on issue #13387:
URL: https://github.com/apache/lucene/issues/13387#issuecomment-2608302325

   > Having a Multi-Reader on all the child log-group directories still won't 
provide a unified view of all group level segments associated with a Lucene 
Index. Even now, OpenSearch interacts with a Lucene index not only for indexing 
documents or opening a reader to read these indexed docs, but also for 
retrieving SegmentInfos associated with the latest commit of an IndexWriter 
directory (for eg: for storing snapshots of an Index on a remote store) or for 
obtaining file list associated with a past commit (for deleting unreferenced 
files inside commit deletion policy).
   
   This seems to be very specific to how OpenSearch interacts with the 
IndexWriter. I'm not sure if a "no writes IndexWriter" applies more generally 
to Lucene. Can we explore potential extending the MultiReader to support your 
use case?


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