Hi Nico, No, you can have as many parallel tasks doing async IO operations as you want. What the documentation says is that in each one of these tasks, there is one thread handling the requests.
Hope this helps, Kostas > On Mar 31, 2017, at 12:17 PM, Nico <nico.franz...@gmail.com> wrote: > > Hi, > > I have a short question regarding the AsyncFunction of Flink 1.2.0. In the > documentation it says: > > "[...] that the AsyncFunction is not called in a multi-threaded fashion. > There exists only one instance of the AsyncFunction and it is called > sequentially for each record in the respective partition of the stream." > > Does it mean the there is only subtask of the Operator, so the parallelism is > always 1 for this Operator? > > Thank you :) > > Best, > Nico
