Faiss: add and remove_ids operate on different threads in IndexFlat at the same time?

[xianshangyouling]

Is there a thread safety issue, if add and remove_ids operate on different threads simultaneously using IndexFlat? Thank you.

[Enet4]

Yes, synchronization is required for any concurrent mutation on an index, regardless of its implementation. See the wiki page on Thread safety.

Faiss CPU indices are thread-safe for concurrent searches, and other operations that do not change the index. A multithreaded use of functions that change the index needs to implement mutual exclusion.

[xianshangyouling]

Thank you for your answer.

[mdouze]

No activity, closing.