Book Image

Elasticsearch Indexing

By : Huseyin Akdogan
Book Image

Elasticsearch Indexing

By: Huseyin Akdogan

Overview of this book

Beginning with an overview of the way ElasticSearch stores data, you’ll begin to extend your knowledge to tackle indexing and mapping, and learn how to configure ElasticSearch to meet your users’ needs. You’ll then find out how to use analysis and analyzers for greater intelligence in how you organize and pull up search results – to guarantee that every search query is met with the relevant results! You’ll explore the anatomy of an ElasticSearch cluster, and learn how to set up configurations that give you optimum availability as well as scalability. Once you’ve learned how these elements work, you’ll find real-world solutions to help you improve indexing performance, as well as tips and guidance on safety so you can back up and restore data. Once you’ve learned each component outlined throughout, you will be confident that you can help to deliver an improved search experience – exactly what modern users demand and expect.
Table of Contents (15 chapters)
Elasticsearch Indexing
About the Author
About the Reviewer

How does the snapshot process works?

As stated earlier, a repository can contain multiple snapshots of the same cluster. Therefore, the snapshots files are stored in compact form. This means that your data will not be repeated when you have multiple snapshots of the same indices. At first, Elasticsearch checks the list of the index files. Then, it copies only newly created or changed files since the last snapshot. Now look at the following example:

curl -XGET localhost:9200/my_index/_search?pretty
   "took": 3,
   "timed_out": false,
   "_shards": {
      "total": 1,
      "successful": 1,
      "failed": 0
   "hits": {
      "total": 2,
      "max_score": 1,
      "hits": [
            "_index": "my_index",
            "_type": "snapshot",
            "_id": "AVCmN4l-7pWKrBPkopj3",
            "_score": 1,
            "_source": {
               "title": "Document A"
            "_index": "my_index",
            "_type": "snapshot"...