We have around 80 es clusters in our production environment and with terabytes of data .
Currently we are running with elasticsearch-1.4.1-SNAPSHOT version and now we are planning to update it with 2.1.1 version.
In 2.x version the Multiple path.data striping , In our es configuration we used multiple data directories like this
So while upgrading to 2.x es takes 2-3 hrs to become yellow state , I want to know what is the best way we can upgrade with out downtime. I have read the document that you guys mentioned in https://www.elastic.co/blog/key-point-to-be-aware-of-when-upgrading-from-elasticsearch-1-to-2
Like building new cluster with 2.x and Dual-feed source event data to both old and new cluster .
I want to know how can we dual feed data on both old and new cluster
Please give some suggestions
Thanks And Regards