# Reindex from Int4\_hnsw to normal

**URL:** <https://discuss.elastic.co/t/reindex-from-int4-hnsw-to-normal/370250>\
**Category:** Elasticsearch\
**Tags:** vector-search\
**Created:** [November 9, 2024, 5:54am UTC](https://discuss.elastic.co/t/reindex-from-int4-hnsw-to-normal/370250 "2024-11-09T05:54:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sandra\_a](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sandra_a/32/126560_2.png) [@sandra\_a](https://discuss.elastic.co/u/sandra_a)\
**Post date:** [November 9, 2024, 5:54am UTC](https://discuss.elastic.co/t/reindex-from-int4-hnsw-to-normal/370250/1 "2024-11-09T05:54:32Z")

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Hi.  
If i have a dense vector with int4\_hnsw can i reindex it to default indexing?  
should i specify any option for it?

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<div class="post-metadata">

**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:** [November 9, 2024, 6:36am UTC](https://discuss.elastic.co/t/reindex-from-int4-hnsw-to-normal/370250/2 "2024-11-09T06:36:17Z")

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I believe you would like to use [this option](https://www.elastic.co/guide/en/elasticsearch/reference/current/dense-vector.html#dense-vector-params)? In 8.15, the default value is int8\_hnsw.

You need to reindex your data. So if you don't define that option when you create the new index, it will be applied anyway.

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<div class="post-metadata">

**Author:** ![sandra\_a](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sandra_a/32/126560_2.png) [@sandra\_a](https://discuss.elastic.co/u/sandra_a)\
**Post date:** [November 9, 2024, 6:57am UTC](https://discuss.elastic.co/t/reindex-from-int4-hnsw-to-normal/370250/3 "2024-11-09T06:57:07Z")

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Yes I ran a test reindex and i saw it is int8\_hnsw  
then i put null for index\_options. and just specify `"similarity": "cosine"`.

Thank you