Elasticsearch

By default shards should be automatically allocated to nodes. But in extreme cases where you had to add or remove nodes to the cluster or after […]

Simple problem with a simple solution. In this post we will see how to delete an index in Elasticsearch. Solution We have 3 indices in Elasticsearch […]

Shutting down a node abruptly is not the right way to decommission or remove a node from the Elasticsearch cluster. Doing so will cause your shards […]

An alias as the name suggests is an alias or another name to the index in Elasticsearch. It is quite useful when you want to refer […]

Elasticsearch used to add _timestamp field with the ingestion timestamp automatically to all documents that are being added to the index. Unfortunately, this was removed in […]

A pipeline is a definition of a series of processors that are to be executed in the same order as they are declared.  Think of a […]

Deleting a single document is pretty straightforward in Elasticsearch. We can simply issue a DELETE on the document id and the document will be deleted from […]

In this post we have shown how to copy an index and all its contents to a new index in Elasticsearch. In this post we are […]

In this post we will describe how to copy an index and its contents to a new index in Elasticsearch. We currently have an index named […]

Filtering based on a range like greater than, less than, greater than equal etc. are pretty common requirements when you work with data. In this post […]

We can specify conditional expressions like OR, AND using the Query expression during search in Elasticsearch. We have an index named account and in the index […]

When you search or lookup a document, Elasticsearch by default returns or shows you all the fields in the document. $ curl -X GET "localhost:9200/account/_doc/954?pretty" { […]

Elasticsearch offers 2 different contexts on how you have query or filter documents in an index – Query context and Filter context. Query context In the […]

It is quite common that you have a need to find the count of the number of documents in an Elasticsearch index. There are several ways […]