how to add index

[llllly26]

hi,I want to know when I have an index file,and I have a batch of new data and want to add it to the index,how to do? use index.add() directly? if i need to train? and I want to know the principle of index.train,thank you.

[kingafy]

Even I have a similar requirement. How to add new delta file to existing index instead of reprocessing the entire file.

[PankajJ08]

Any update on the issue?