Upgrading from druid 10 to druid 11 without data loss

Hi all,

I would like to upgrade the currently deployed druid of my cluster to 0.11.0, following this link: http://druid.io/docs/latest/operations/rolling-updates.html, it’s really unclear to me how it can be done safely,

I would be thankful if someone can help me with a tutorial or a guide to do it.

Thanks.

Hi Musab:

As long as the data in your deep storage and Database is not touched, any historical data can be restored after upgrade if lost.

Do you have real time ingestion such as Kafka though ?

Hope this helps.