carbondata insert job has only one task

[陈星宇]

hi ,


i wrote data into carbondata table from parquet table by spark_sql 'insert into 
carbondata_table select * from parquet_table', the task number is always only 
one. 
it caused the insert job was very slow . 
i tried increase spark.default.parallelism = 1000, but only increase query 
task. 
the parquet files are more than 500.
how can i get better performance when insert into carbondata table.


THANKS
ChenXingYu