# "Idle" node traffic **URL:** \ **Category:** Elasticsearch\ **Created:** [July 18, 2014, 2:01pm UTC](https://discuss.elastic.co/t/idle-node-traffic/18738 "2014-07-18T14:01:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Glen\_Smith](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/glen_smith/32/111656_2.png) [@Glen\_Smith](https://discuss.elastic.co/u/Glen_Smith)\ **Post date:** [July 18, 2014, 2:01pm UTC](https://discuss.elastic.co/t/idle-node-traffic/18738/1 "2014-07-18T14:01:41Z")
In a cluster where there is no client activity happening (no index or search requests), how much data, roughly, is being sent between the nodes? I was able to find a nice blog post from Njal Karevoll at found.no that explained all the transport channels per node, but nothing about the steady-state volume of data. -- 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/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![nik9000](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/nik9000/32/44947_2.png) [@nik9000](https://discuss.elastic.co/u/nik9000)\ **Post date:** [July 18, 2014, 2:35pm UTC](https://discuss.elastic.co/t/idle-node-traffic/18738/2 "2014-07-18T14:35:56Z")
This node is empty but running in a cluster serving traffic: [http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&h=elastic1017.eqiad.wmnet&m=cpu\_report&r=hour&s=by%20name&hc=4&mc=2](http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&h=elastic1017.eqiad.wmnet&m=cpu_report&r=hour&s=by%20name&hc=4&mc=2) Here is the rest of the cluster: [http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&m=cpu\_report&r=hour&s=by%20name&hc=4&mc=2](http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&m=cpu_report&r=hour&s=by%20name&hc=4&mc=2) Its not exactly what you asked for, but its something. I imagine the activity on empty nodes when there is no traffic would be lower but I'm not sure by how much. Nik On Fri, Jul 18, 2014 at 10:01 AM, Glen Smith [glen@smithsrock.com](mailto:glen@smithsrock.com) wrote: > In a cluster where there is no client activity happening (no index or > search requests), how much data, roughly, is being sent between the nodes? > I was able to find a nice blog post from Njal Karevoll at found.no that > explained all the transport channels per node, but nothing about the > steady-state volume of data. > > -- > 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/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%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/CAPmjWd0cP8Qx8UbupfLtmMfEZaUgUGC0-%2B35XB3W6cLLW9RiGg%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAPmjWd0cP8Qx8UbupfLtmMfEZaUgUGC0-%2B35XB3W6cLLW9RiGg%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Glen\_Smith](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/glen_smith/32/111656_2.png) [@Glen\_Smith](https://discuss.elastic.co/u/Glen_Smith)\ **Post date:** [July 18, 2014, 5:44pm UTC](https://discuss.elastic.co/t/idle-node-traffic/18738/3 "2014-07-18T17:44:00Z")
Thank you very much for the links! I'm trying to infer what I can from them (looks like there are 19 nodes in the cluster, and this single cluster is averaging about 165kBytes/sec sent over the last hour. I'm still hoping there will be a more formal answer detailing the node-to-node communications, how it might geometrically increase with the number of nodes (since, AFAICT, each node pair is directly connected), whether it changes based on the number of indices or shards, etc. On Friday, July 18, 2014 10:36:25 AM UTC-4, Nikolas Everett wrote: > This node is empty but running in a cluster serving traffic: > > [http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&h=elastic1017.eqiad.wmnet&m=cpu\_report&r=hour&s=by%20name&hc=4&mc=2](http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&h=elastic1017.eqiad.wmnet&m=cpu_report&r=hour&s=by%20name&hc=4&mc=2) > Here is the rest of the cluster: > > [http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&m=cpu\_report&r=hour&s=by%20name&hc=4&mc=2](http://ganglia.wikimedia.org/latest/?c=Elasticsearch%20cluster%20eqiad&m=cpu_report&r=hour&s=by%20name&hc=4&mc=2) > > Its not exactly what you asked for, but its something. I imagine the > activity on empty nodes when there is no traffic would be lower but I'm not > sure by how much. > > Nik > > On Fri, Jul 18, 2014 at 10:01 AM, Glen Smith \<[gl...@smithsrock.com](mailto:gl...@smithsrock.com) > \\> wrote: > > > In a cluster where there is no client activity happening (no index or > > search requests), how much data, roughly, is being sent between the nodes? > > I was able to find a nice blog post from Njal Karevoll at found.no that > > explained all the transport channels per node, but nothing about the > > steady-state volume of data. > > > > -- > > 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 [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/caf2799b-82d2-4a28-8671-60f0e9f96137%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/20fb79c0-75f5-418a-ab47-3cc7236fc10d%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/20fb79c0-75f5-418a-ab47-3cc7236fc10d%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, 1:14am UTC](https://discuss.elastic.co/t/idle-node-traffic/18738/4 "2017-07-06T01:14:50Z")