# Reindex from the existing index
**URL:** https://discuss.elastic.co/t/reindex-from-the-existing-index/23026
**Category:** Elasticsearch
**Created:** [April 1, 2015, 4:15am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026 "2015-04-01T04:15:36Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Vladi\_Feigin](https://discuss.elastic.co/u/Vladi_Feigin)
#### Post date: [April 1, 2015, 4:15am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026/1 "2015-04-01T04:15:36Z")
## Hi, Is there a way to build a new index from the existing index ? Thank you, Vladi
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### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [April 1, 2015, 4:50am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026/2 "2015-04-01T04:50:31Z")
If you Search on the web site for reindex, you will find this:
> **[Reindexing Your Data | Elasticsearch: The Definitive Guide \[2.x\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/guide/current/reindex.html)**
David
> Le 1 avr. 2015 à 06:15, Vladi Feigin [vladif@liveperson.com](mailto:vladif@liveperson.com) a écrit :
>
> ## Hi, Is there a way to build a new index from the existing index ? Thank you, Vladi
>
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### Author:  [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)
#### Post date: [April 1, 2015, 6:21am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026/3 "2015-04-01T06:21:13Z")
On Wednesday, April 01, 2015 at 06:15 CEST,
Vladi Feigin [vladif@liveperson.com](mailto:vladif@liveperson.com) wrote:
> Is there a way to build a new index from the existing index ?
Elasticsearch doesn't ship with a tool for this purpose nor
a one-stop-shop API, but there are several wrappers of the
bulk reindexing API. I've successfully used the es-reindex
tool and the elasticsearch.helpers.reindex() function from
the official Python client for ES.
> **[GitHub - geronime/es-reindex: Ruby script to copy ElasticSearch index (reindex).](https://github.com/geronime/es-reindex)**
>
> Ruby script to copy ElasticSearch index (reindex). - GitHub - geronime/es-reindex: Ruby script to copy ElasticSearch index (reindex).
[http://elasticsearch-py.readthedocs.org/en/master/helpers.html](http://elasticsearch-py.readthedocs.org/en/master/helpers.html)
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Magnus Bäck | Software Engineer, Development Tools
[magnus.back@sonymobile.com](mailto:magnus.back@sonymobile.com) | Sony Mobile Communications
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### Author:  [@Anil\_Karaka](https://discuss.elastic.co/u/Anil_Karaka)
#### Post date: [April 1, 2015, 6:51am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026/4 "2015-04-01T06:51:37Z")
install elasticsearch python plugin
> > > from elasticsearch import Elasticsearch
> > > form elasticsearch.helpers import reindex
> > > es = Elasticsearch(["es.node1"])
> > > reindex(es, "source\_index", "target\_index")
this will reindex from source\_index to target\_index, also keep in mind that
the mappings won't be transferred.
you can specify another target cluster as well.. and a query so that
documents that only satisfy that query in source index will be reindexed
into the target index.
more
documentation [Helpers — Elasticsearch 8.0.0 documentation](https://elasticsearch-py.readthedocs.org/en/master/helpers.html#elasticsearch.helpers.reindex)
On Wednesday, April 1, 2015 at 11:52:26 AM UTC+5:30, Magnus Bäck wrote:
> On Wednesday, April 01, 2015 at 06:15 CEST,
> Vladi Feigin \<[vla...@liveperson.com](mailto:vla...@liveperson.com) \\> wrote:
>
> > Is there a way to build a new index from the existing index ?
>
> Elasticsearch doesn't ship with a tool for this purpose nor
> a one-stop-shop API, but there are several wrappers of the
> bulk reindexing API. I've successfully used the es-reindex
> tool and the elasticsearch.helpers.reindex() function from
> the official Python client for ES.
>
> [GitHub - geronime/es-reindex: Ruby script to copy ElasticSearch index (reindex).](https://github.com/geronime/es-reindex)
> [Helpers — Elasticsearch 8.0.0 documentation](http://elasticsearch-py.readthedocs.org/en/master/helpers.html)
>
> --
> Magnus Bäck | Software Engineer, Development Tools
> [magnu...@sonymobile.com](mailto:magnu...@sonymobile.com) \ | Sony Mobile Communications
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:22am UTC](https://discuss.elastic.co/t/reindex-from-the-existing-index/23026/5 "2017-07-06T00:22:27Z")