# 3 nodes cluster arhitecture **URL:** \ **Category:** Elasticsearch\ **Created:** [June 11, 2014, 11:56am UTC](https://discuss.elastic.co/t/3-nodes-cluster-arhitecture/18041 "2014-06-11T11:56:13Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ciprian\_2](https://avatars.discourse-cdn.com/v4/letter/c/9dc877/32.png) [@Ciprian\_2](https://discuss.elastic.co/u/Ciprian_2)\ **Post date:** [June 11, 2014, 11:56am UTC](https://discuss.elastic.co/t/3-nodes-cluster-arhitecture/18041/1 "2014-06-11T11:56:13Z")
Hi! My application is reading data from a Sqs and pushing it to elasticseach. This is done from 2 consumers each with a thread pool of 5 threads. That means 10 threads who are inserting/deleting documents in elasticsearch. From other web application the inserted data is read. I want to create a cluster with 3 nodes(4g of ram each) for doing that. I was thinking for the next arhitecture : - one master node - one master/data node - one data node /etc/elasticsearch/elasticsearch.yml - ``` discovery.zen.minimum_master_nodes*: 2 ``` bootstrap.mlockall=true /etc/default/elasticsearch ES\_HEAP\_SIZE=2g MAX\_LOCKED\_MEMORY=unlimited It is enough for the cluster? Should I add another server for the non data node? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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:** [June 11, 2014, 11:58am UTC](https://discuss.elastic.co/t/3-nodes-cluster-arhitecture/18041/2 "2014-06-11T11:58:49Z")
For that size just make them all data+master nodes. You really want n/2+1 masters, where n = number of nodes, so that you prevent split-brain from occurring, and having all 3 as master will provide that. Just set ES\_HEAP\_SIZE in the defaults, you don't need to worry about anything else. Regards, Mark Walkom Infrastructure Engineer Campaign Monitor email: [markw@campaignmonitor.com](mailto:markw@campaignmonitor.com) web: [www.campaignmonitor.com](http://www.campaignmonitor.com) On 11 June 2014 21:56, Ciprian [turcanciprian87@gmail.com](mailto:turcanciprian87@gmail.com) wrote: > Hi! > > My application is reading data from a Sqs and pushing it to > elasticseach. This is done from 2 consumers each with a thread pool of 5 > threads. That means 10 threads who are inserting/deleting documents in > elasticsearch. From other web application the inserted data is read. > I want to create a cluster with 3 nodes(4g of ram each) for doing that. > I was thinking for the next arhitecture : > > - one master node > - one master/data node > - one data node > > /etc/elasticsearch/elasticsearch.yml > > - > > ``` > discovery.zen.minimum_master_nodes*: 2 > > ``` > > bootstrap.mlockall=true > > /etc/default/elasticsearch > ES\_HEAP\_SIZE=2g > MAX\_LOCKED\_MEMORY=unlimited > > It is enough for the cluster? Should I add another server for the non > data node? > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/013e5c76-70a6-405c-a573-bbb165f86adb%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAEM624a1OrxbP0rkB3AB6dzUKOhG0g\_duuZ1yMbHN3T\_7jHG\_w%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAEM624a1OrxbP0rkB3AB6dzUKOhG0g_duuZ1yMbHN3T_7jHG_w%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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, 1:23am UTC](https://discuss.elastic.co/t/3-nodes-cluster-arhitecture/18041/3 "2017-07-06T01:23:19Z")