# Compress ELK data node **URL:** \ **Category:** Elasticsearch\ **Created:** [September 11, 2016, 6:28am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230 "2016-09-11T06:28:54Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![asafi31](https://avatars.discourse-cdn.com/v4/letter/a/b38774/32.png) [@asafi31](https://discuss.elastic.co/u/asafi31)\ **Post date:** [September 11, 2016, 6:28am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/1 "2016-09-11T06:28:54Z")
hello all there is option in node level or index level to configure elasticsearch data compress thx asaf ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [September 11, 2016, 6:59am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/2 "2016-09-11T06:59:43Z")
Look at [https://www.elastic.co/guide/en/elasticsearch/reference/2.4/index-modules.html#\_static\_index\_settings](https://www.elastic.co/guide/en/elasticsearch/reference/2.4/index-modules.html#_static_index_settings) ``` index.codec ``` ---
**Author:** ![asafi31](https://avatars.discourse-cdn.com/v4/letter/a/b38774/32.png) [@asafi31](https://discuss.elastic.co/u/asafi31)\ **Post date:** [September 11, 2016, 7:14am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/3 "2016-09-11T07:14:39Z")
> [@dadoonet](#): > > index.codec so as i undrostood i've just need to add index.codec: best\_compression to elasticsearch.yml file ---
**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 11, 2016, 8:00am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/4 "2016-09-11T08:00:32Z")
You can apply that to the index dynamically. ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 10, 2016, 8:10am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/5 "2016-10-10T08:10:15Z")
Can this be done in 2.4? Its listed under static settings in the docs and I'm getting this error when trying: `Can't update non dynamic settings[[index.codec]] for open indices` ---
**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:** [October 10, 2016, 8:10am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/6 "2016-10-10T08:10:35Z")
You do need to close the index, apply, then reopen it. ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 10, 2016, 8:19am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/7 "2016-10-10T08:19:52Z")
Got it. If i want to both force merge & change the codec, should i first change the codec and then merge, or first merge and then change the codec? ---
**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:** [October 10, 2016, 8:50am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/8 "2016-10-10T08:50:28Z")
EDIT - actually I was wrong. You need to change the codec first because the merge is what applies it. ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 10, 2016, 9:43am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/9 "2016-10-10T09:43:45Z")
And if i already merged to 1 segment, will running the merge again do something? Because when I'm running it now, it finishes immediately. So how can i change the codec now? ---
**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:** [October 10, 2016, 10:10pm UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/10 "2016-10-10T22:10:58Z")
You can change it, just run a force merge again. ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 11, 2016, 6:08am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/11 "2016-10-11T06:08:46Z")
It does not re-run the merge once its fully merged to 1 segment per shard. ---
**Author:** ![Lumaraf](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lumaraf/32/50639_2.png) [@Lumaraf](https://discuss.elastic.co/u/Lumaraf)\ **Post date:** [October 11, 2016, 8:03am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/12 "2016-10-11T08:03:37Z")
Don't expect huge savings from doing this. The index should already be compressed. You are just setting a higher compression level. ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 13, 2016, 7:22am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/13 "2016-10-13T07:22:18Z")
I reached 50% savings, thats very huge for me 🙂 ---
**Author:** ![shaharmor](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@shaharmor](https://discuss.elastic.co/u/shaharmor)\ **Post date:** [October 16, 2016, 6:52am UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/14 "2016-10-16T06:52:16Z")
For tracking purposes: [https://github.com/elastic/elasticsearch/issues/20936](https://github.com/elastic/elasticsearch/issues/20936) ---
**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, 10:11pm UTC](https://discuss.elastic.co/t/compress-elk-data-node/60230/15 "2017-07-05T22:11:57Z")