# Is Upgrade Assistant only upgrade internal index or legacy incompatible index?

**URL:** <https://discuss.elastic.co/t/is-upgrade-assistant-only-upgrade-internal-index-or-legacy-incompatible-index/345828>\
**Category:** Elasticsearch\
**Created:** [October 26, 2023, 1:50pm UTC](https://discuss.elastic.co/t/is-upgrade-assistant-only-upgrade-internal-index-or-legacy-incompatible-index/345828 "2023-10-26T13:50:18Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Shinn](https://avatars.discourse-cdn.com/v4/letter/s/a88e4f/32.png) [@Shinn](https://discuss.elastic.co/u/Shinn)\
**Post date:** [October 26, 2023, 1:50pm UTC](https://discuss.elastic.co/t/is-upgrade-assistant-only-upgrade-internal-index-or-legacy-incompatible-index/345828/1 "2023-10-26T13:50:18Z")

</div>

Hi,  
As Elastic Search only compatible with previous major version, e.g. ES 8 compatible with index created in ES 7.  
I'm wondering if Upgrade Assistant would ignore index created in ES 7?  
In other words, the index verion would still be 7.x.x after upgrade to ES 8?

So it only perform reindexing for following during upgrade process:

- Index created piror to ES 7, e.g. ES 6.
- Internal index/Hidden index

If there are only small amount of legacy indexes, then the upgrade process would be fast, right? As no need to reindex ES 7 data.

Many Thanks

---

<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:** [October 27, 2023, 3:45pm UTC](https://discuss.elastic.co/t/is-upgrade-assistant-only-upgrade-internal-index-or-legacy-incompatible-index/345828/2 "2023-10-27T15:45:48Z")

</div>

Welcome!

> [@Shinn](#):
>
> I'm wondering if Upgrade Assistant would ignore index created in ES 7?

It won't be ignored but Elastic will tell you what you need to do if anything needs to be done.

> [@Shinn](#):
>
> In other words, the index verion would still be 7.x.x after upgrade to ES 8?

It depends. But I guess that in most cases no reindex will be required.

> [@Shinn](#):
>
> If there are only small amount of legacy indexes, then the upgrade process would be fast, right?

Yes.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [November 24, 2023, 3:46pm UTC](https://discuss.elastic.co/t/is-upgrade-assistant-only-upgrade-internal-index-or-legacy-incompatible-index/345828/3 "2023-11-24T15:46:02Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.