# Improve search performance in cluster
**URL:** https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346
**Category:** Elasticsearch
**Created:** [November 11, 2015, 6:29pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346 "2015-11-11T18:29:20Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Max\_Just](https://discuss.elastic.co/u/Max_Just)
#### Post date: [November 11, 2015, 6:29pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346/1 "2015-11-11T18:29:20Z")
Hi every body, if I add a few servers to the cluster in replica role, will it improve cluster search performance? or I will get only data copy and cluster performance will have no changes.
---
### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [November 11, 2015, 8:18pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346/2 "2015-11-11T20:18:20Z")
There's no such thing as "replica roles" for nodes. All data nodes are equals. It's likely that you'll get a performance gain, but it depends on how much data you have, how it's sharded, what kind of hardware you have, what kind of queries you make, and so on.
---
### Author:  [@devkmsg](https://discuss.elastic.co/u/devkmsg)
#### Post date: [November 11, 2015, 8:34pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346/3 "2015-11-11T20:34:48Z")
You might want to look at the client node. Client nodes do not run the data service and only serve as a HTTP loadbalancer of sorts for the cluster.
[https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html)
---
### Author:  [@Max\_Just](https://discuss.elastic.co/u/Max_Just)
#### Post date: [November 12, 2015, 3:51pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346/4 "2015-11-12T15:51:50Z")
Thanks for the link!
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 11:38pm UTC](https://discuss.elastic.co/t/improve-search-performance-in-cluster/34346/5 "2017-07-05T23:38:56Z")