I wonder if there’s a way to convert a plain index (I have a delta index and some main indexes, eg. main1, main2) to a real-time index? Could it be done?
you could issue attach with truncate for the main table Manticore Search Manual: Data creation and modification > Adding data from external storages > Adding data to tables > Attaching one table to another
then attach to that rt index for the delta table
this way you will get the rt index with disk chunk 0 from the main index and disk chunk 1 from the delta index