Adding new shards for Solr
Refer to the Apache Solr reference guide if you must add shards for Solr.
If after reviewing the other recommendations for Solr , you need to add additional shards to your existing deployment, the following Solr documentation will help you understand how to accomplish that task: https://archive.apache.org/dist/lucene/solr/ref-guide/apache-solr-ref-guide-5.5.pdf