Hi,   If you don't have data saved in Solr, then moving solr servers is very staright forward by adding a new solr server role on the new host using Cloudera Manager.   If you already have data saved in solr, then in addition to the above step you also need to move the solr cores of current host to the new host. And here are the steps to move the core.   Instructions The supported procedure to migrate a replica from one server to another is as follows: Migrating from:cdh5-2.cloudera.local Collection: students Replica name: students_shard1_replica2 Migrating to:cdh5-3.cloudera.local Collection: students Replica name: students_shard1_replica3 On the target server, from a command line, add the Core with the following API call (Core Admin UI is not recommended): curl http://cdh5-3.cloudera.local:8983/solr/admin/cores?action=CREATE&name=students_shard1_replica3&collection=students&shard=shard1 Note: Name should be a new replica name, but should conform to collection_shardn_replican for consistency. If two replicas exist in the current shard, use replica3 in the name to avoid conflicts. Verify that the core is created, and moves from recovery state to UP. On the old node, from a command line, run the following UNLOAD command (again, Core Admin UI is not recommended), which will remove the core.properties in /var/lib/solr on the old node: curl http://cdh5-2.cloudera.local:8983/solr/admin/cores?action=UNLOAD&core=students_shard1_replica2&deleteInstanceDir=yes Note: If the old node is down or Solr unavailable, the above command will fail. Manually remove the core.properties under /var/lib/solr/collection_shardn_replican so the node does not attempt to register that replica when it starts. Verify in the CLOUD UI that the old replica has been removed. Important: To speed recovery time, suspend any incoming ingestion while the new replica is doing a full replication from the leader. NRT ingestion can then be turned back on.   After the above steps, you can remove the solr server from the first host if required (use Cloudera Manager to handle this) ... View more