Bigdata, HDP Search, Solr, SolrCloud

SolrCloud vs HDPSearch…

Let us start to remove some confusion we have related to SolrCloud and HDPSearch. First what is the SolrCloud:- Apache Solr includes the ability to set up a cluster of Solr servers that combines fault tolerance and high availability, called SolrCloud, these capabilities provide distributed indexing and search capabilities, supporting the following features: Central configuration for the entire cluster. Automatic load balancing and fail-over for queries. ZooKeeper integration for cluster coordination and configuration. Lets clear some confusion on Solr and SolrCloud(ZooKeeper coordinating, Solr with HDFS, HA mode) too:- Solr and SolrCloud are not separate things; Solr is the application while […]
Administration, Bigdata, Hadoop

Apache Solr Search Installation on HDP2.6 using Yum Repo

As we know that “HDP 2.6” is not bundle with “HDP Search” which includes Solr. Therefore here in two parts of article i am going to explain ways to install Solr/SolrCloud/HDP_Search:- 1. Apache Solr Search Installation on HDP2.6 using Yum Repo. 2. Apache Solr Search Installation on HDP2.6 using Ambari Management Pack. Both are using different approach therefore i have divided it into two articles Recently i have installed HDP2.6 on one of my development environment. Now its time to bring same services back one by one as we are running on HDP2.5 in production environment, one of them is […]
Bigdata, Hadoop

SolrCloud : CAP theorem world, this makes Solr a CP system, and keep availability in certain circumstances.

A SolrCloud cluster holds one or more distributed indexes which are called Collections. Each Collection is divided into shards (to increase write capacity) and each shard has one or more replicas (to increase query capacity). One replica from each shard is elected as a leader, who performs the additional task of adding a ‘version’ to each update before streaming it to available replicas. This means that write traffic for a particular shard hits the shard’s leader first and is then synchronously replicated to all available replicas. One Solr node (a JVM instance) may host a few replicas belonging to different […]