In the first chapter, we've seen how to index a particular document into Elasticsearch. Now, it's time to find out how to index many documents in a more convenient and efficient way than doing it one by one.
Elasticsearch allows us to merge many requests into one packet. These packets can be sent as a single request. In this way, we can mix the following operations:
Adding or replacing the existing documents in the index (
index)Removing documents from the index (
delete)Adding new documents to the index when there is no other definition of the document in the index (
create)
The format of the request was chosen for processing efficiency. It assumes that every line of the request contains a JSON object with the description of the operation followed by the second line with a JSON object itself. We can treat the first line as a kind of information line and the second as the data line. The exception to this rule is the...