# Can mult-search instances with one index&search instace on one machine sharing indices created by the one? **URL:** \ **Category:** Elasticsearch\ **Created:** [September 9, 2015, 9:19am UTC](https://discuss.elastic.co/t/can-mult-search-instances-with-one-index-search-instace-on-one-machine-sharing-indices-created-by-the-one/28917 "2015-09-09T09:19:59Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![makeyang](https://avatars.discourse-cdn.com/v4/letter/m/f05b48/32.png) [@makeyang](https://discuss.elastic.co/u/makeyang)\ **Post date:** [September 9, 2015, 9:19am UTC](https://discuss.elastic.co/t/can-mult-search-instances-with-one-index-search-instace-on-one-machine-sharing-indices-created-by-the-one/28917/1 "2015-09-09T09:19:59Z")
let's say we have powerful machines and our use case is less write while more search. can I deploy multi instaces only cover search responsibility while one instance cover write&search responsibility on one machine? ---
**Author:** ![shanec](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/shanec/32/4004_2.png) [@shanec](https://discuss.elastic.co/u/shanec)\ **Post date:** [September 9, 2015, 10:13pm UTC](https://discuss.elastic.co/t/can-mult-search-instances-with-one-index-search-instace-on-one-machine-sharing-indices-created-by-the-one/28917/2 "2015-09-09T22:13:39Z")
Yes, you **_could_** do this (with [shadow replicas](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-shadow-replicas.html)), but you should be asking yourself **_if_** you want to do that. You can leave a single node per machine and it will happily read and write your indexes in an optimal way, including handling the caching of results for the node. By introducing a second node on the same physical hardware, you may actually decrease your overall performance. ---
**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, 11:51pm UTC](https://discuss.elastic.co/t/can-mult-search-instances-with-one-index-search-instace-on-one-machine-sharing-indices-created-by-the-one/28917/3 "2017-07-05T23:51:27Z")
Closed on July 5, 2017, 11:51pm UTC