# What happens when a new node is added to the ES cluster? **URL:** \ **Category:** Elasticsearch\ **Created:** [September 4, 2012, 9:19am UTC](https://discuss.elastic.co/t/what-happens-when-a-new-node-is-added-to-the-es-cluster/8921 "2012-09-04T09:19:26Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Atharva\_Patel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/atharva_patel/32/2414_2.png) [@Atharva\_Patel](https://discuss.elastic.co/u/Atharva_Patel)\ **Post date:** [September 4, 2012, 9:19am UTC](https://discuss.elastic.co/t/what-happens-when-a-new-node-is-added-to-the-es-cluster/8921/1 "2012-09-04T09:19:26Z")
I am curious to know what exactly happens when a new node is added in the existing running ES cluster. - How do the primary and replica shards get rearranged (in general the storage-data distribution)? - What happens to the query and index processing load? - What are the other factors that get affected in terms of performance improvement or decrement when adding a new node? -- ---
**Author:** ![Atharva\_Patel](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/atharva_patel/32/2414_2.png) [@Atharva\_Patel](https://discuss.elastic.co/u/Atharva_Patel)\ **Post date:** [September 6, 2012, 5:45am UTC](https://discuss.elastic.co/t/what-happens-when-a-new-node-is-added-to-the-es-cluster/8921/2 "2012-09-06T05:45:53Z")
Ideas, anyone?! On Tuesday, 4 September 2012 14:49:26 UTC+5:30, Atharva Patel wrote: > I am curious to know what exactly happens when a new node is added in the > existing running ES cluster. > > - How do the primary and replica shards get rearranged (in general the > storage-data distribution)? > - What happens to the query and index processing load? > - What are the other factors that get affected in terms of performance > improvement or decrement when adding a new node? -- ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:13am UTC](https://discuss.elastic.co/t/what-happens-when-a-new-node-is-added-to-the-es-cluster/8921/3 "2017-07-06T03:13:58Z")