In this chapter, we have discussed different ways in which Apache Solr can be scaled to work with big data/large datasets. We looked at different implementations of Solr-big data such as Solr-HDFS, Katta, Solr-1045, Solr-1301, and Apache Solr with Cassandra. We also looked at advanced analytics by integrating Apache Solr with R. In the next chapter, we will focus on improving the performance for big data.