Hi chen, There might be some metadata migrations between 2.1 and 2.4. Please take a metadata backup before doing the upgrade; If the upgrade fails, you can rollback with the backup.
The cube data is immutable, so is safe. And don't forget to update HBase coprocessor. 程程 <[email protected]> 于2018年9月29日周六 上午12:22写道： > Hi, guys > > I want to upgrade kylin 2.4.1. My kylin version is 2.1.0. > > 1. Can I rollback kylin 2.1.0 when upgrading failed and kylin have > produced new data in new version? > > 2. What are the potential risks of upgrading? > -- Best regards, Shaofeng Shi 史少锋
