• I'm planning to index ~600k docs, with an avg size of indexed fields about 300 bytes. I have read de docs about imports, Client-side batch size vs server-side batching, etc. I'm also tested the airbyte method (no fit for my case) and I think they are sending client side batches of 10k docs. It's ok to send 10K docs client side batches in my own total reindex code?

Yeah, 10K docs should be fine. You just want to make sure you've increased the client-side timeout for the import API call to as high as 30 minutes, so it never times out

Thanks for reminding me about the timeout