/ I read that we can point the new solr 4.4 to the data index from previous solr i.e. 3.5/ Yes you can do that. It would be even better if you would run an optimize post migration, it will re-write the segments.
/f this is true, can we change the schema in 4.4 solr. We have many un-stored fields in solr 3.5 schema, which we would like to make stored, so that we can take the advantage of atomic updates. / Changes can be made to the schema, but reindexing would be required for the data to make unstored data, stored. /If we do a csv export from 3.5 solr and then import it in the 4.4 index, we get a problem with copy fields i.e. the value in the copy field is computed twice. Once from the csv import and other from solr internal computation. / Have you tried removing the copyField data from the csv? I think it should work then. -- View this message in context: http://lucene.472066.n3.nabble.com/Migrating-from-solr-3-5-to-4-4-tp4085049p4085051.html Sent from the Solr - User mailing list archive at Nabble.com.