When you first created the collection, you ran a command similar to:
- solrctl instancedir --generate $HOME/solr_configs
This command was what created the configs that you imported for solr. You can see the various configs by running:
- solrctl instancedir --list
Then pick the config that goes with your collection and run:
- solrctl instancedir --get <name_from_list> /path/to/local_fs
Then change the schema.xml in /path/to/local_fs/conf and run:
- solrctl instancedir --update <name_from_list> /path/to/local_fs
Then the schema will get updated. Note, when you update the schema, you have to reindex all your documents or else they won't have indexes for the latest schema changes.
Hope this helps.