druid upgrade 0.6.146 to 0.9

Hi,

We want to upgrade from 0.6.146 to 0.9 Our current configuration ingests data from realtime via kafka with no partitioning and no replication.

We don’t want to loose data. what could be the best approach.

You will need to update from 0.6.x to 0.7.x to 0.8.x to 0.9.x

Each version has caveats so please read the release notes carefully.

We successfully upgraded from 0.6 to 0.9 by running a parallel cluster of druid ver 9 and then shutting down druid 6 after comparing numbers