Github user fhueske commented on the pull request:
https://github.com/apache/flink/pull/301#issuecomment-71433679
Hmmm, using the String pattern seems to be much more comfortable for users,
no?
If a user wants to have the data written out with some kind of filename
pattern, she needs to implement a new IF and overwrite a method instead of
simply setting a configuration parameter.
The only thing you gain is that you can do some "fancy" arithmetics (+/- 1)
with the task number.
Not sure if that's worth it. The former way was very elegant and clean, IMO.
If you persist on the having the option to choose between 0 and 1-based
indexing, I would vote to go with the former variant and keep both parameters.
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