# Calculate reindexing time for large index of data

**URL:** https://discuss.elastic.co/t/calculate-reindexing-time-for-large-index-of-data/104447
**Category:** Elasticsearch
**Created:** [October 18, 2017, 6:36pm UTC](https://discuss.elastic.co/t/calculate-reindexing-time-for-large-index-of-data/104447 "2017-10-18T18:36:08Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Natalia\_Kuleniuk](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/natalia_kuleniuk/32/43727_2.png) [@Natalia\_Kuleniuk](https://discuss.elastic.co/u/Natalia_Kuleniuk)
#### Post date: [October 18, 2017, 6:36pm UTC](https://discuss.elastic.co/t/calculate-reindexing-time-for-large-index-of-data/104447/1 "2017-10-18T18:36:08Z")

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Is there any ways to calculate how much time would it take to reindex index , that store 37 GB of data and has 180,000,000 documents in it?

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### 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: [October 18, 2017, 7:17pm UTC](https://discuss.elastic.co/t/calculate-reindexing-time-for-large-index-of-data/104447/2 "2017-10-18T19:17:14Z")

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You could start with a subset by adding a query in the reindex call and then extrapolate?

I mean it really depends so no one can tell I’m afraid.

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### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 15, 2017, 7:17pm UTC](https://discuss.elastic.co/t/calculate-reindexing-time-for-large-index-of-data/104447/3 "2017-11-15T19:17:37Z")

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