# How to Upgrade ElasticSearch from 0.20.4 to 0.90.11 or RC1?
**URL:** https://discuss.elastic.co/t/how-to-upgrade-elasticsearch-from-0-20-4-to-0-90-11-or-rc1/16497
**Category:** Elasticsearch
**Created:** [March 20, 2014, 12:15pm UTC](https://discuss.elastic.co/t/how-to-upgrade-elasticsearch-from-0-20-4-to-0-90-11-or-rc1/16497 "2014-03-20T12:15:29Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Rok\_Inroks](https://discuss.elastic.co/u/Rok_Inroks)
#### Post date: [March 20, 2014, 12:15pm UTC](https://discuss.elastic.co/t/how-to-upgrade-elasticsearch-from-0-20-4-to-0-90-11-or-rc1/16497/1 "2014-03-20T12:15:29Z")
Hi,
I've been assigned to upgrade a single node production Elasticsearch
server.
The ideal would be to have an upgrade process description witch avoid
losing data . So my question taking this requirement into account is it
possible to upgrade such a server knowing from ElasticSearch version 0.20.4
straight to 090.11 ( or even 1.0.0 RC1) and what the instruction to
accomplish it ?
Thanks for the helps
--
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/b3427233-2d4c-438b-aed4-14e925e347d9%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/b3427233-2d4c-438b-aed4-14e925e347d9%40googlegroups.com).
For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 1:41am UTC](https://discuss.elastic.co/t/how-to-upgrade-elasticsearch-from-0-20-4-to-0-90-11-or-rc1/16497/2 "2017-07-06T01:41:53Z")