Multiple solr's in single solr instance

Step 1:

Go to your solr directory.

cd /opt/solr141/
sudo mkdir home1

copy contents into home1 directory from other home directory.

sudo cp -a /opt/justbooks/solr141/home/. /opt/justbooks/solr141/home1

Step 2:

create solr1.xml under tomcat6/conf/catalina/localhost. (<your url>/solr1) Copy from solr.xml and just change value to point to new home dir in environment tag

 
<Context docBase="/opt/solr/solr141/dist/apache-solr-1.4.1.war" debug="0" crossContext="true" > <Environment name="solr/home" type="java.lang.String" value="/opt/solr/solr141/home1" override="true" /> </Context>

Step 3:

In

/opt/solr/solr141/home1/conf/Solr-config.xml 

<dataDir>${solr.data.dir:/opt/solr/solr141/home2/data}</dataDir> <locktype>simple</locktype> <unlockonstartup>true</unlockonstartup>

Step 4:

Restart tomcat

Step 5:

Since we copied from other home folder, we need to clean up the index

curl localhost:7585/solr3/update --data '*:*' -H 'Content-type:text/xml; charset=utf-8'