# Elasticsearch version values

**URL:** <https://discuss.elastic.co/t/elasticsearch-version-values/201899>\
**Category:** Elasticsearch\
**Created:** [October 2, 2019, 7:02am UTC](https://discuss.elastic.co/t/elasticsearch-version-values/201899 "2019-10-02T07:02:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![tomas321](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tomas321/32/55227_2.png) [@tomas321](https://discuss.elastic.co/u/tomas321)\
**Post date:** [October 2, 2019, 7:02am UTC](https://discuss.elastic.co/t/elasticsearch-version-values/201899/1 "2019-10-02T07:02:00Z")

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Hi,  
I'm familiar with minimum\_index\_compatibility\_version and hope it indicates the minimum version required for index compatibility (e.g. reindex). But I'm not sure what minimum\_wire\_compatibility\_version means.

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**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [October 2, 2019, 9:06am UTC](https://discuss.elastic.co/t/elasticsearch-version-values/201899/2 "2019-10-02T09:06:59Z")

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That's the minimum version from which you can perform a rolling upgrade. "Wire compatibility" means the nodes can talk to each other "over the wire", i.e. across the network, whereas "Index compatibility" just means the newer node can read the files the older node left on disk.

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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:** [October 30, 2019, 9:07am UTC](https://discuss.elastic.co/t/elasticsearch-version-values/201899/3 "2019-10-30T09:07:02Z")

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