Re: [druid-user] Parse spec format : timeAndDims

You use parquet when your input type is parquet. You use timeandDims when you want to just specify time and dim columns in non-string data.

https://druid.apache.org/docs/latest/ingestion/data-formats.html#timeanddims-parsespec

For hadoop you want to use the support Hadoop input formats
https://druid.apache.org/docs/latest/ingestion/index.html#batch

If your data is in Hadoop as parquet format then follow this:

https://druid.apache.org/docs/0.20.1/ingestion/data-formats.html#parquet-hadoop-parser