# Elasticsearch index size is less than it takes on disk **URL:** \ **Category:** Elasticsearch\ **Created:** [November 1, 2017, 11:27am UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023 "2017-11-01T11:27:09Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Tobymaro](https://avatars.discourse-cdn.com/v4/letter/t/c77e96/32.png) [@Tobymaro](https://discuss.elastic.co/u/Tobymaro)\ **Post date:** [November 1, 2017, 11:27am UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023/1 "2017-11-01T11:27:09Z")
Hello, I noticed strange issue with disk space consumption. I checked how much space my indexes take: GET \_cat/indices/\*?v&s=store.size Than I calculated total size (ofcoure store.size) it's about 1250 GB. Then I checked system information: GET \_cat/allocation?v shards disk.indices disk.used disk.avail disk.total disk.percent 2030 1.5tb 1.6tb 272.1gb 1.9tb 86 2030 1.5tb 1.6tb 271.7gb 1.9tb 86 Also I cheked disk size with "du" command and get the same result 1.6 TB used per node. This is dedicated drive for elasticsearch only. There is only elasticsearch information, I mean only /nodes directory. So my qestion is - why Lucene indexes take 3 times more space than Elasticsearch indexes. I hope I provided clear explanation of my issue. ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [November 1, 2017, 11:54am UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023/2 "2017-11-01T11:54:13Z")
> [@Tobymaro](#): > > why Lucene indexes take 3 times more space than Elasticsearch indexes How did you arrive at this conclusion based on the data you provided? I am afraid I do not follow the calculation. ---
**Author:** ![Tobymaro](https://avatars.discourse-cdn.com/v4/letter/t/c77e96/32.png) [@Tobymaro](https://discuss.elastic.co/u/Tobymaro)\ **Post date:** [November 1, 2017, 12:08pm UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023/3 "2017-11-01T12:08:17Z")
OK, I can explain. I think its clear why elasticsearch indexes take 1250 GB. Also I have 2 nodes - 2 TB per nodes. So, since I see in elastic that total index size devided between 2 nodes is 1250 GB. And disk space consumed is about 3.2 TB (1.6 +1.6TB). So disk space usage is almost 3 times larger than elasticsearch indexes. ---
**Author:** ![Tobymaro](https://avatars.discourse-cdn.com/v4/letter/t/c77e96/32.png) [@Tobymaro](https://discuss.elastic.co/u/Tobymaro)\ **Post date:** [November 9, 2017, 1:09pm UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023/4 "2017-11-09T13:09:48Z")
So, nobody knows why i have this behavior. =( ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [December 7, 2017, 1:12pm UTC](https://discuss.elastic.co/t/elasticsearch-index-size-is-less-than-it-takes-on-disk/106023/5 "2017-12-07T13:12:38Z")
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