Multi Search Removal in V3

[gona-sreelatha]

I noticed that support for multi-index search has been removed. This was one of the key reasons I chose to use GraphRAG as the multi-search feature was extremely useful for my use case.

I understand that this change was made to simplify the vector store configuration. I was wondering if this simplification is inherently tied to the removal of multi-search. For example, if I have multiple indexs whose embeddings are stored in the same vector store, wouldn’t it still be possible to flatten the vector store while retaining multi-index search?

Also, is there any recommended approach to implement/support multi-index search externally(outside the library), now that it’s being removed in v3? Any help is greatly appreciated! Thanks in advance.

@natoverse @AlonsoGuevara