How to Upgrade ElasticSearch from 0.20.4 to 0.90.11 or RC1?

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.
To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/b3427233-2d4c-438b-aed4-14e925e347d9%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.