How to upgrade for Kylin 4.0.0-alpha

Kylin 4.0.0-alpha is the first early-access version of Kylin 4, it provided new implementation of its storage engine and query engine. By using Parquet storage to replace HBase storage, Kylin will separate compuation and storage , will conform to Cloud-Native trend .

Suggestion

Please check FAQ of Kylin 4.0.0-alpha (FAQ Kylin 4.X) and you can find some tips.

1. Is Kylin 3.x and Kylin 4.x metadata compatible?
2. Is Kylin 3.x and Kylin 4.x pre-calculated cuboid data compatible? If not, will there be a migration plan? 
3. What features will no longer be supported in Kylin 4? And what do Kylin 4 provided ?

In general, please :

1. Purge all cube before your migration.
2. Refine your kylin.properties, make sure you have fully understanding how to configure new query engine and build engine (please check Kylin 4.X Configuration). 

If you want to learn Kylin 4.0, you can check this How to learn Kylin in Docker .