Data Lake for Enterprises

Deleting a document

Deleting a document can be performed by a command of the form DELETE {index-name}/{type}/{id}, as shown here:

DELETE datalake/contacts/101

Figure 31: Query to Delete a Document

As seen earlier the result indicates a deleted document. The DELETE in Elasticsearch is generally performed by id; however, deletion by query is also supported but it is a costlier operation. Again, the number of shards affected is 3 due to the same reason as stated earlier.

A point to remember here is that deletion does not reclaim the space immediately, till the deleted documents are expunged by the internal optimization/compaction processes. ...