# Coordinating node recommendation

**URL:** <https://discuss.elastic.co/t/coordinating-node-recommendation/237364>\
**Category:** Elasticsearch\
**Created:** [June 16, 2020, 9:25pm UTC](https://discuss.elastic.co/t/coordinating-node-recommendation/237364 "2020-06-16T21:25:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![newkidtopc](https://avatars.discourse-cdn.com/v4/letter/n/6bbea6/32.png) [@newkidtopc](https://discuss.elastic.co/u/newkidtopc)\
**Post date:** [June 16, 2020, 9:25pm UTC](https://discuss.elastic.co/t/coordinating-node-recommendation/237364/1 "2020-06-16T21:25:50Z")

</div>

Hello,

We have a ES cluster of 10 data nodes with additional 5 master nodes. We are exploring the idea of adding co-ordinating node to the cluster to help with query performance, especially aggregation queries.

The data stored in the ES cluster is mostly log type of data.

I read a lot of documentation around the co-ordinating nodes but I am still unclear on the following points:

1. Does adding co-ordinating nodes help in a cluster of our size?

2. Currently, all the query and the indexing traffic goes to data nodes (which are behind nginx load balancer). The plan is to add the co-ordinating nodes to the nginx LB as well.

Would I need to remove the data nodes from the LB to make sure that indexing/querying traffic only goes through the co-ordinating nodes? Or can I still keep the data and co-ordinating nodes as part of the LB? The reason is, if there is a failure on the co-ordinating nodes, we still have the data nodes to handle the indexing/querying traffic and we might not experience application downtime.

1. I assume we would need more than co-ordinating node. What is the ideal number to support the cluster size (The configuration of the co-ordinating node in terms of compute, memory and network would be similar to that of the data nodes).

Any guidance around this is highly appreciated.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 14, 2020, 9:25pm UTC](https://discuss.elastic.co/t/coordinating-node-recommendation/237364/2 "2020-07-14T21:25:59Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.