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Hudi supports customizable partition values which could be a derived value of another field. Also, storing the partition value only as part of the field results in losing type information when queried by various query engines.

I am seeing lot of archive files. How do I control the number of archive commit files generated?

Please note that in cloud stores that do not support log append operations, Hudi is forced to create new archive files to archive old metadata operations.  You can increase hoodie.commits.archival.batch moving forward to increase the number of commits archived per archive file. In addition, you can increase the difference between the 2 watermark configurations : hoodie.keep.max.commits (default : 30) and hoodie.keep.min.commits (default : 20). This way, you can reduce the number of archive files created and also at the same time increase the number of metadata archived per archive file. Note that post 0.7.0 release where we are adding consolidated Hudi metadata (RFC-15), the follow up work would involve re-organizing archival metadata so that we can do periodic compactions to control file-sizing of these archive files.

Contributing to FAQ 

A good and usable FAQ should be community-driven and crowd source questions/thoughts across everyone. 

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