elasticsearch-js/docs/reference/api/IndicesModifyDataStreamAction.md

Interface IndicesModifyDataStreamAction

Name	Type	Description
add_backing_index	IndicesModifyDataStreamIndexAndDataStreamAction	Adds an existing index as a backing index for a data stream. The index is hidden as part of this operation. WARNING: Adding indices with the add_backing_index action can potentially result in improper data stream behavior. This should be considered an expert level API.
remove_backing_index	IndicesModifyDataStreamIndexAndDataStreamAction	Removes a backing index from a data stream. The index is unhidden as part of this operation. A data stream’s write index cannot be removed.