leehom edited a comment on issue #3072:
URL:
https://github.com/apache/incubator-dolphinscheduler/issues/3072#issuecomment-656426207
ds can be seen as a data processor, sharding can improving the
performance in whole data processing lifecycle.
for example, data input from db table, sharding task can input data from
table Parallizing;
the save happening at data converting , udf , data wrriting to db
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