# Merging of indices from two elasticsearch environments
**URL:** https://discuss.elastic.co/t/merging-of-indices-from-two-elasticsearch-environments/104898
**Category:** Elasticsearch
**Created:** [October 23, 2017, 12:55pm UTC](https://discuss.elastic.co/t/merging-of-indices-from-two-elasticsearch-environments/104898 "2017-10-23T12:55:34Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@mruthyu](https://discuss.elastic.co/u/mruthyu)
#### Post date: [October 23, 2017, 12:55pm UTC](https://discuss.elastic.co/t/merging-of-indices-from-two-elasticsearch-environments/104898/1 "2017-10-23T12:55:34Z")
Is it possible to merge the indices from two environments with different versions of elasticsearch (5.4.0 and 5.4.3) .
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### Author:  [@spinscale](https://discuss.elastic.co/u/spinscale)
#### Post date: [October 23, 2017, 12:58pm UTC](https://discuss.elastic.co/t/merging-of-indices-from-two-elasticsearch-environments/104898/2 "2017-10-23T12:58:43Z")
you could use reindex from remote from the first cluster and then run another reindex from remote from the second cluster. However that of course means, that last write wins and overwrites previously existing documents (or does not write by itself, depending on configuration).
Anything more advanced needs to be developed by yourself, i.e. merging half the fields from one side and the other from the second side.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 20, 2017, 12:58pm UTC](https://discuss.elastic.co/t/merging-of-indices-from-two-elasticsearch-environments/104898/3 "2017-11-20T12:58:48Z")
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