Setting up Solr master-slave

We can set up Solr replication where the master Solr server is used for indexing and both master and slave Solr servers can be used for searches. Setting up replication is pretty simple in Solr. Check out the requestHandler named/replication. Simply create a copy of the example folder inside Solr as example3 and empty the index files from the example3 folder with the following command:

  cp -r example example3
  rm -rf example3/solr/collection1/data

In the master server (example folder), change the solrconfig.xml file to add configuration parameters for the replication master with the following code:

  <lst name="master">
  <str name="replicateAfter">commit</str>
  <str name="replicateAfter">startup</str>
  <str name="confFiles">schema.xml,stopwords.txt</str>
  </lst>

Here, we have specified that replication should happen after a start up and after a commit on Solr. And the schema.xml and stopwords.txt files should...