Elasticsearch – Aggregation

Elasticsearch Aggregation provides capability similar to RDBMS group by opeartor. Facets provide a great way to aggregate data within a document set context. This context is defined by the executed query in combination with the different levels of filters that can be defined (filtered queries, top-level filters, and facet level filters). While powerful, their implementation … More Elasticsearch – Aggregation

Custom Partitioner / Combiner In hadoop

Hadoop Provides support for defining Custom Partitioner & Combiner for writing mapreduce jobs. The use case of Combiner & Partitioner is different. Below are some useful information regarding partitioner & Combiner. – The partitioning phase takes place after the map phase and before the reduce phase. – The number of partitions is equal to the … More Custom Partitioner / Combiner In hadoop

Using nginx to provide authentication to Elasticsearch / Kibana

Friends authentication & authorization is always an important requirement for development of any application. In this post i am going to show you how to provide authentication to elasticsearch / kibana using Nginx server. Steps are given below: 1. Install the nginx server You can follow below given link for reference. https://www.digitalocean.com/community/tutorials/how-to-install-nginx-on-ubuntu-14-04-lts 2. Create the … More Using nginx to provide authentication to Elasticsearch / Kibana