# Multiple TCP between ES servers **URL:** \ **Category:** Elasticsearch\ **Created:** [October 23, 2014, 6:40pm UTC](https://discuss.elastic.co/t/multiple-tcp-between-es-servers/20407 "2014-10-23T18:40:39Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![daaku\_gee](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@daaku\_gee](https://discuss.elastic.co/u/daaku_gee)\ **Post date:** [October 23, 2014, 6:40pm UTC](https://discuss.elastic.co/t/multiple-tcp-between-es-servers/20407/1 "2014-10-23T18:40:39Z")
ES version 1.1 ; 50 node cluster ; average rps approx 100k Seeing a 100s of ESTABLISHED connection between two ES servers. On a 50 node cluster there are about 8k ESTABLISHED connections. Is this how things are supposed to be? tcp6 0 0 10.23.14.151:9400 10.35.14.88:48622 ESTABLISHED tcp6 0 0 10.23.14.151:9400 10.35.14.88:48612 ESTABLISHED tcp6 0 0 10.23.14.151:33974 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:33970 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:34342 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:36050 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:33181 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:36105 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:9400 10.35.14.88:46875 ESTABLISHED tcp6 0 0 10.23.14.151:33175 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:9400 10.35.14.88:48616 ESTABLISHED tcp6 0 0 10.23.14.151:35901 10.35.14.88:9400 ESTABLISHED tcp6 0 0 10.23.14.151:9400 10.35.14.88:46976 ESTABLISHED tcp6 0 0 10.23.14.151:9400 10.35.14.88:46831 ESTABLISHED Thanks D -- 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/CAH53p96V\_f6u2js3P9tzLYStgpaJ1r2J%2Bkp6m7JN3dKq-Ag3JA%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAH53p96V_f6u2js3P9tzLYStgpaJ1r2J%2Bkp6m7JN3dKq-Ag3JA%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![otisg](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/otisg/32/492_2.png) [@otisg](https://discuss.elastic.co/u/otisg)\ **Post date:** [October 24, 2014, 3:47am UTC](https://discuss.elastic.co/t/multiple-tcp-between-es-servers/20407/2 "2014-10-24T03:47:01Z")
Hi, Have a look at [Elasticsearch Internals: Networking Introduction | Elastic Blog](https://www.found.no/foundation/elasticsearch-networking/) ## Otis Monitoring \* Alerting \* Anomaly Detection \* Centralized Log Management Solr & Elasticsearch Support \* [http://sematext.com/](http://sematext.com/) On Thursday, October 23, 2014 2:40:47 PM UTC-4, daaku gee wrote: > ES version 1.1 ; 50 node cluster ; average rps approx 100k > > Seeing a 100s of ESTABLISHED connection between two ES servers. On a 50 > node cluster there are about 8k ESTABLISHED connections. Is this how things > are supposed to be? > > tcp6 0 0 10.23.14.151:9400 10.35.14.88:48622 > ESTABLISHED > tcp6 0 0 10.23.14.151:9400 10.35.14.88:48612 > ESTABLISHED > tcp6 0 0 10.23.14.151:33974 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:33970 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:34342 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:36050 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:33181 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:36105 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:9400 10.35.14.88:46875 > ESTABLISHED > tcp6 0 0 10.23.14.151:33175 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:9400 10.35.14.88:48616 > ESTABLISHED > tcp6 0 0 10.23.14.151:35901 10.35.14.88:9400 > ESTABLISHED > tcp6 0 0 10.23.14.151:9400 10.35.14.88:46976 > ESTABLISHED > tcp6 0 0 10.23.14.151:9400 10.35.14.88:46831 > ESTABLISHED > > Thanks > D -- 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/6bdaf423-a3d1-41cc-94f7-4cc6c980da3c%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/6bdaf423-a3d1-41cc-94f7-4cc6c980da3c%40googlegroups.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, 12:54am UTC](https://discuss.elastic.co/t/multiple-tcp-between-es-servers/20407/3 "2017-07-06T00:54:03Z")