There are moments where we want to move shards between nodes in SolrCloud cluster. Until now, the Solr Collections API doesn't have a command telling Solr to move a single shard to another node. We need to do such an operation manually. For example, let's assume that we want to exchange one of the nodes in our cluster with a new server, but we don't want any downtime or interruptions to our service. This recipe will show you how to do that.
Before reading further, I would suggest you all to read the Creating a new SolrCloud cluster, Adding replicas after collection creation, and Removing replicas recipes of this chapter. These recipes will show you how to create a new SolrCloud cluster and create a collection. We also assume that ZooKeeper is running on 192.168.1.10 and is listening on port 2181. We already have the configuration called firstcollection stored in ZooKeeper and we already have four SolrCloud nodes running as a cluster.