Elasticsearch 7 and Elastic Stack - In Depth and Hands On! - Updating Data in Elasticsearch

The video tutorial explains how to update documents in Elasticsearch, emphasizing that documents are immutable. Instead of modifying a document directly, a new version is created with an incremented version number. The tutorial demonstrates how to perform both full and partial updates using curl commands, highlighting the importance of versioning in managing document updates. It also covers the cleanup process where old versions are marked for deletion. The tutorial provides practical examples of updating a document's title and discusses the implications of document immutability and versioning in Elasticsearch.

What is the primary reason documents in Elasticsearch are considered immutable?

• To ensure data consistency

• To reduce storage costs

• To allow multiple users to edit simultaneously

• To simplify the update process

How does Elasticsearch handle updates to documents?

• By creating a new version of the document

• By merging changes into the existing document

• By modifying the existing document directly

• By deleting the old document immediately

What happens to the old version of a document when a new version is created in Elasticsearch?

• It is marked for deletion and removed later

• It is archived for future reference

• It is immediately deleted

• It is overwritten by the new version

Which HTTP method is used for a partial update in Elasticsearch?

• GET

• DELETE

• PUT

• POST

In the practical demonstration, what field was updated in the document?

• Title

• Year

• Director

• Genre

What is the significance of the version number in Elasticsearch document updates?

• It shows the number of times the document has been accessed

• It indicates the number of fields in the document

• It helps in tracking the latest version of the document

• It represents the size of the document

What is a key takeaway about document updates in Elasticsearch?

• Old versions are permanently stored for historical reference

• Documents are immutable, and updates create new versions

• The update process is manual and requires user intervention

• Documents can be updated without creating new versions