You can use the MOVEREPLICA command: https://lucene.apache.org/solr/guide/7_6/collections-api.html Alternately you can also add another replica and then remove one of your old replicas. When you a replica you can either specify the node it shall be placed on or let Solr pick a node for you.

On 12.02.2019 09:15, neerajbhatt wrote:
Hi

We have a solr cluster of 3 machines , A collection has three shards and 2
replicas so total of 9. Right now each machine has one shard leader and 2
replicas
Because of index size we need to increase the cluster to 9 ,What is the best
possible way to move a shard leader or replica to a new node





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