Understanding the Bulk API
The Bulk API allows you to perform multiple indexing, updating, deleting, and creating operations in a single API call. Each operation is specified in the request body using newline-delimited JSON (NDJSON).
Basic Structure of a Bulk Request
A bulk request consists of action/metadata lines followed by source data lines. Here’s the general format:
{ action_and_metadata }
{ data }
{ action_and_metadata }
{ data }
...
Example of a Bulk Request
{ "index": { "_index": "myindex", "_id": "1" } }
{ "field1": "value1", "field2": "value2" }
{ "index": { "_index": "myindex", "_id": "2" } }
{ "field1": "value3", "field2": "value4" }
In this example, two documents are being indexed into the myindex index with IDs 1 and 2.
Using the Elasticsearch Bulk API for High-Performance Indexing
Elasticsearch is a powerful search and analytics engine designed to handle large volumes of data. One of the key techniques to maximize performance when ingesting data into Elasticsearch is using the Bulk API. This article will guide you through the process of using the Elasticsearch Bulk API for high-performance indexing, complete with detailed examples and outputs.