Data Lake for Enterprises

Document in Elasticsearch

Data in Elasticsearch is stored in the form of documents. These documents are addressable and have identifiable attributes that can be queried from the store. A sample document (JSON format) is shown in the figure:

Figure 05: Sample document in Elasticsearch

Similar to String objects in Java, documents in Elasticsearch are immutable, so once created, you cannot update them. If you would want to update one, you have to either reindex or replace it.

Apart from the real data, a document does have additional information about the document itself, called document metadata. The most important metadata for a document are ...