[eric_khun]

I've migrated last week 500M documents (100GB) of data from mongodb to ES. It's quite simple and straightforward. Used the bulk API. Just make sure to have a good machine (16vCPU) and use parallelization and just wait. after 24hours, it just works.

[ngrilly]

How do keep the ES index consistent with MongoDB?

[mozumder]

That's only 200 bytes per document.

Can they be really considered 'documents' or are they actually database fields?

[woah]

That's an average.