Idents stored and returned from the DurableCatalog can come in 4 forms!

• <db_name>/<collection|index>/<ident_identifier>
  • directoryPerDb + wiredTigerDirectoryForIndexes
• <db_name>/<ident_name>
  • directoryPerDb
• <collection|index>/<ident_identifier>
  • wiredTigerDirectoryForIndexes
• <ident_name>
  • default, no options enabled

ident_identifier: <counter>-<random number>

ident_name: <collection|index>-<ident_identifier>

This interface design was a contributing cause to SERVER-89625. At the very least, better and clearer documentation of this universe of possibilities would make this interface less error prone. Redesigning is, of course, another option as well.