# Upgrade to ElasticSearch 2.3

**URL:** <https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863>\
**Category:** Elasticsearch\
**Created:** [April 30, 2016, 2:18pm UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863 "2016-04-30T14:18:21Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ankush\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/3be4f8/32.png) [@Ankush\_Gupta](https://discuss.elastic.co/u/Ankush_Gupta)\
**Post date:** [April 30, 2016, 2:18pm UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863/1 "2016-04-30T14:18:21Z")

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There are two versions (in separate clusters) of elasticsearch: 0.90 and 1.2.2. running.  
What steps should I take to upgrade them to 2.3 ?  
Please consider me as a beginner.

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [April 30, 2016, 10:26pm UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863/2 "2016-04-30T22:26:24Z")

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You should really build new clusters and then reindex the data into them. You don't want to upgrade those in place.

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**Author:** ![Ankush\_Gupta](https://avatars.discourse-cdn.com/v4/letter/a/3be4f8/32.png) [@Ankush\_Gupta](https://discuss.elastic.co/u/Ankush_Gupta)\
**Post date:** [May 2, 2016, 4:50am UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863/3 "2016-05-02T04:50:31Z")

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Hi Mark,

Thanks for the quick response. Yes the original plan is to migrate the data  
and create new indexes.  
The features like facet etc. are discontinued in 2.3, so, is it advisable  
to migrate given that we still want to use the facet feature in our app.  
What is the alternative to facet in 2.3? Is there a code change required  
for that?

Any such other features which are discontinued in 2.3, but were there in  
0.90 and 1.2.2?

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [May 2, 2016, 4:52am UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863/4 "2016-05-02T04:52:38Z")

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> [@Ankush\_Gupta](#):
>
> The features like facet etc. are discontinued in 2.3, so, is it advisableto migrate given that we still want to use the facet feature in our app.

No it is not, at least not to 2.X.

> [@Ankush\_Gupta](#):
>
> What is the alternative to facet in 2.3? Is there a code change requiredfor that?

Aggregations, and yes.

> [@Ankush\_Gupta](#):
>
> Any such other features which are discontinued in 2.3, but were there in0.90 and 1.2.2?

I'd suggest you read the breaking changes to see what applies to your app.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:54pm UTC](https://discuss.elastic.co/t/upgrade-to-elasticsearch-2-3/48863/5 "2017-07-05T22:54:55Z")

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