# Update mapping
**URL:** https://discuss.elastic.co/t/update-mapping/20302
**Category:** Elasticsearch
**Created:** [October 17, 2014, 7:54am UTC](https://discuss.elastic.co/t/update-mapping/20302 "2014-10-17T07:54:42Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@eunever32](https://discuss.elastic.co/u/eunever32)
#### Post date: [October 17, 2014, 7:54am UTC](https://discuss.elastic.co/t/update-mapping/20302/1 "2014-10-17T07:54:42Z")
Is the way to update mapping of large index as follows
Create empty index with new mapping
Copy old data into new index
Alias new index to previous
If so, what are recommended tools?
Ideally there would be a user interface for IT people to use?
Thanks
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### Author:  [@jpountz](https://discuss.elastic.co/u/jpountz)
#### Post date: [October 19, 2014, 9:24pm UTC](https://discuss.elastic.co/t/update-mapping/20302/2 "2014-10-19T21:24:33Z")
Yes it is. There are unfortunately no APIs yet to reindex content from an
index to a new index. There is an issue open for that[1] which is currently
blocked by the fact that we need a better infrastructure to handle
long-running tasks in a cluster.
However, it is still possible to reindex externally by using the
scan/scroll and bulk-update APIs. Some our our client libraries even
provide easy-to-use helper methods to do so. For instance see the
elasticsearch.helpers.reindex[2] helper from our python client.
[1] [Reindex from \_source by document ID or Query · Issue #492 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/492)
[2]
[Helpers — Python Elasticsearch client 8.11.0 documentation](http://elasticsearch-py.readthedocs.org/en/latest/helpers.html#elasticsearch.helpers.reindex)
On Fri, Oct 17, 2014 at 9:54 AM, [eunever32@gmail.com](mailto:eunever32@gmail.com) wrote:
> Is the way to update mapping of large index as follows
>
> Create empty index with new mapping
> Copy old data into new index
> Alias new index to previous
>
> If so, what are recommended tools?
>
> Ideally there would be a user interface for IT people to use?
>
> Thanks
>
> --
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Adrien Grand
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### Author:  [@nik9000](https://discuss.elastic.co/u/nik9000)
#### Post date: [October 19, 2014, 10:19pm UTC](https://discuss.elastic.co/t/update-mapping/20302/3 "2014-10-19T22:19:05Z")
Scan\scroll is indeed the way to go. The only thing I can add is that you
should take the opportunity to run sanity checks on the documents like
filtering out fields that were in the old index but shouldn't be copied to
the new one.
On Oct 19, 2014 5:24 PM, "Adrien Grand" [adrien.grand@elasticsearch.com](mailto:adrien.grand@elasticsearch.com)
wrote:
> Yes it is. There are unfortunately no APIs yet to reindex content from an
> index to a new index. There is an issue open for that[1] which is currently
> blocked by the fact that we need a better infrastructure to handle
> long-running tasks in a cluster.
>
> However, it is still possible to reindex externally by using the
> scan/scroll and bulk-update APIs. Some our our client libraries even
> provide easy-to-use helper methods to do so. For instance see the
> elasticsearch.helpers.reindex[2] helper from our python client.
>
> [1] [Reindex from \_source by document ID or Query · Issue #492 · elastic/elasticsearch · GitHub](https://github.com/elasticsearch/elasticsearch/issues/492)
> [2]
> [Helpers — Python Elasticsearch client 8.11.0 documentation](http://elasticsearch-py.readthedocs.org/en/latest/helpers.html#elasticsearch.helpers.reindex)
>
> On Fri, Oct 17, 2014 at 9:54 AM, [eunever32@gmail.com](mailto:eunever32@gmail.com) wrote:
>
> > Is the way to update mapping of large index as follows
> >
> > Create empty index with new mapping
> > Copy old data into new index
> > Alias new index to previous
> >
> > If so, what are recommended tools?
> >
> > Ideally there would be a user interface for IT people to use?
> >
> > Thanks
> >
> > --
> > You received this message because you are subscribed to the Google Groups
> > "elasticsearch" group.
> > To unsubscribe from this group and stop receiving emails from it, send an
> > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com).
> > To view this discussion on the web visit
> > [https://groups.google.com/d/msgid/elasticsearch/1691b5c9-3aa5-4d8b-9149-e2b2dff56817%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/1691b5c9-3aa5-4d8b-9149-e2b2dff56817%40googlegroups.com)
> > .
> > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
>
> --
> Adrien Grand
>
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> [https://groups.google.com/d/msgid/elasticsearch/CAL6Z4j4tTpMX9gQCG7j1cNXwi4b-udsF0SUrQXMduf3OU3uhTA%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAL6Z4j4tTpMX9gQCG7j1cNXwi4b-udsF0SUrQXMduf3OU3uhTA%40mail.gmail.com?utm_medium=email&utm_source=footer)
> .
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:55am UTC](https://discuss.elastic.co/t/update-mapping/20302/4 "2017-07-06T00:55:12Z")