We are replacing a drive mounted at /old with one mounted at /new. Our index currently lives on /old, and our plan was to:
1. Create a new index on /new 2. Reindex from our database so that the new index on /new is properly populated. 3. Stop solr. 4. Symlink /old to /new (Solr now looks for the index at /old/solr, which redirects to /new/solr) 5. Start solr 6. (Later) Stop solr, swap the drives (old for new), and start solr. (Solr now looks for the index at /old/solr again, and finds it there.) 7. Delete the index pointing to /new created in step 1. The idea was that this would create a new index for solr, would populate it with the right content, and would avoid having to touch our existing solr configurations aside from creating one new index, which we could soon delete. I just did steps 1-5, but I got null pointer exceptions when starting solr, and it appears that the index on /new has been almost completely deleted by Solr (this is a bummer, since it takes days to populate). Is this expected? Am I terribly crazy to try to swap indexes on disk? As far as I know, the only difference between the indexes is their name. We're using Solr version 4.10.4. Thank you, Mike
