# How Replica from one node to another will move? **URL:** \ **Category:** Elasticsearch\ **Created:** [October 1, 2019, 10:16am UTC](https://discuss.elastic.co/t/how-replica-from-one-node-to-another-will-move/201771 "2019-10-01T10:16:29Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Saptha\_AD](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/saptha_ad/32/48651_2.png) [@Saptha\_AD](https://discuss.elastic.co/u/Saptha_AD)\ **Post date:** [October 1, 2019, 10:16am UTC](https://discuss.elastic.co/t/how-replica-from-one-node-to-another-will-move/201771/1 "2019-10-01T10:16:29Z")
I have a 3 node cluster with 2 master eligible and all are data node & ingest node. Setting is 1 Primary Shard and 1 Replica shard. I have one index "nginx-2019.09" For example Node "A" is master node and haves a Primary Shard of index. Node "B" has a Replica of the index. Node "C" is idle as of now. Suddenly Node "B" went down in the cluster, Master node decides to use Node "C" as a replica for the index. Now Node "C" have whole index date up to date. After few days back Node "B" joins the cluster. My questions are 1. Now again Node B will become a Replica or Node C will continue as replica? 2. If Node C continues as replica, What happens to the replica data which Node B has? 3. Else If Node B elected as new replica, all the data from primary shard gets copied to Node B and Node C data will be deleted? Kindly clarify my doubt ---
**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\ **Post date:** [October 1, 2019, 11:15am UTC](https://discuss.elastic.co/t/how-replica-from-one-node-to-another-will-move/201771/2 "2019-10-01T11:15:30Z")
> [@Saptha\_AD](#): > > I have a 3 node cluster with 2 master eligible and all are data node & ingest node. If you have a three-node cluster then all three nodes should be master-eligible. If you have two master-eligible nodes then your cluster is not fault tolerant. > [@Saptha\_AD](#): > > - Now again Node B will become a Replica or Node C will continue as replica? Node C will continue as the replica. > [@Saptha\_AD](#): > > - If Node C continues as replica, What happens to the replica data which Node B has? Node B will ensure that the data is safely stored elsewhere in the cluster and will then delete its own stale copy to free up the disk space for something else. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [October 29, 2019, 11:15am UTC](https://discuss.elastic.co/t/how-replica-from-one-node-to-another-will-move/201771/3 "2019-10-29T11:15:37Z")
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