Hello, We have an effort underway in Solr to allow in-place reindexing of stored data from older segments as a means to upgrade the index, in order to allow the next Lucene version to open it. This makes use of the following merge policy which prevents older segments from participating in merges so they can be reindexed into latest version segments: https://github.com/apache/solr/pull/3883/files
The merge policy is not specific to Solr as such and so I want to gauge if it would be ok for me to create a Github issue for the same and contribute this policy to Lucene? Thanks, Rahul Goswami
