# Elasticsearch cluster - using client node **URL:** \ **Category:** Elasticsearch\ **Created:** [September 15, 2015, 12:58pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-using-client-node/29318 "2015-09-15T12:58:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![emca\_wojtek](https://avatars.discourse-cdn.com/v4/letter/e/a3d4f5/32.png) [@emca\_wojtek](https://discuss.elastic.co/u/emca_wojtek)\ **Post date:** [September 15, 2015, 12:58pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-using-client-node/29318/1 "2015-09-15T12:58:37Z")
Reading ES documentation I couldn't find a confirmation, if a client node is also useful durning indexing process. Client node role is to support search operations, so data node doesn't has to do that. But if client node is also useful during indexing? Then, i.e., logstash output is set only to client nodes, that spread data over data nodes. If so, is it better than output directly to data nodes? Another question, can I put client node and data node on the same machine (asumming, there is 128 GB RAM, 4 Cores Processor, etc.), is it good way of configuring claster? Regards, Wojtek ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [September 15, 2015, 10:19pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-using-client-node/29318/2 "2015-09-15T22:19:31Z")
> [@emca\_wojtek](#): > > But if client node is also useful during indexing? Yep it is, in exactly the same way it does for searching. > [@emca\_wojtek](#): > > Another question, can I put client node and data node on the same machine (asumming, there is 128 GB RAM, 4 Cores Processor, etc.), is it good way of configuring claster? You may run into contention, but it's worth testing at least. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:50pm UTC](https://discuss.elastic.co/t/elasticsearch-cluster-using-client-node/29318/3 "2017-07-05T23:50:13Z")