# Difference between disk.indices vs disk.used in cat allocation **URL:** \ **Category:** Elasticsearch\ **Created:** [September 1, 2017, 1:42pm UTC](https://discuss.elastic.co/t/difference-between-disk-indices-vs-disk-used-in-cat-allocation/99134 "2017-09-01T13:42:22Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![snobear](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/snobear/32/8027_2.png) [@snobear](https://discuss.elastic.co/u/snobear)\ **Post date:** [September 1, 2017, 1:42pm UTC](https://discuss.elastic.co/t/difference-between-disk-indices-vs-disk-used-in-cat-allocation/99134/1 "2017-09-01T13:42:22Z")
I have a cluster (ES 2.4.5) consisting of 8 nodes, and was checking the size with the cat allocation API: ``` $ curl -s localhost:9200/_cat/allocation?v shards disk.indices disk.used disk.avail disk.total disk.percent node 26 24gb 583gb 10.2tb 10.8tb 5 data03 26 24gb 583gb 10.2tb 10.8tb 5 data08 27 24gb 583gb 10.2tb 10.8tb 5 data04 26 24gb 583gb 10.2tb 10.8tb 5 data07 26 24gb 583gb 10.2tb 10.8tb 5 data05 27 24gb 583gb 10.2tb 10.8tb 5 data02 26 24gb 583gb 10.2tb 10.8tb 5 data06 26 24gb 583gb 10.2tb 10.8tb 5 data01 ``` disk.used says we are using 583 GB on each node. However, `df -h` on a given node shows MUCH less (25GB): ``` $ df -h | grep es Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-data 11T 25G 11T 1% /mnt/es ``` So our actual disk utilization is more in line with **disk.indices** than it is with **disk.usage**. Can someone please explain the difference between these two stats? The docs are lacking in explanation of the various fields. Thanks! ---
**Author:** ![ngamber](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ngamber/32/21759_2.png) [@ngamber](https://discuss.elastic.co/u/ngamber)\ **Post date:** [September 1, 2017, 3:24pm UTC](https://discuss.elastic.co/t/difference-between-disk-indices-vs-disk-used-in-cat-allocation/99134/2 "2017-09-01T15:24:23Z")
curl localhost:9200/\_cat/allocation?help 😉 used is just that, disk used. disk. indices is usage specifically from ES. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 29, 2017, 3:24pm UTC](https://discuss.elastic.co/t/difference-between-disk-indices-vs-disk-used-in-cat-allocation/99134/3 "2017-09-29T15:24:36Z")
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