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From Tamara Mendt <tammyme...@gmail.com>
Subject Re: Broadcasting sets in Flink Streaming
Date Tue, 25 Aug 2015 14:33:03 GMT
Ok, I'll try that. Thanks a lot!

On Tue, Aug 25, 2015 at 4:19 PM, Stephan Ewen <sewen@apache.org> wrote:

> You can do something very similar like broadcast sets like this:
> Use a Co-Map function and connect your main data set regularly ("forward"
> partitioning) to one input and your broadcast set via "broadcast" to the
> other input. You can then retrieve the data in the two map functions
> separately.
> This approach misses the logic that the broadcast data arrives fully
> before the non-broadcast data (you may receive events from the main data
> set before all broadcast data was received), but maybe you can work around
> that...
> On Tue, Aug 25, 2015 at 2:45 PM, Till Rohrmann <trohrmann@apache.org>
> wrote:
>> Hi Tamara,
>> I think this is not officially supported by Flink yet. However, I think
>> that Gyula had once an example where he did something comparable. Maybe he
>> can chime in here.
>> Cheers,
>> Till
>> On Tue, Aug 25, 2015 at 11:15 AM, Tamara Mendt <tammymendt@gmail.com>
>> wrote:
>>> Hello,
>>> I have been trying to use the function withBroadcastSet on a
>>> SingleOutputStreamOperator (map) the same way I would on a MapOperator for
>>> a DataSet. From what I see, this cannot be done. I wonder if there is some
>>> way to broadcast a DataSet to the tasks that are performing transformations
>>> on a DataStream?
>>> I am basically pre-calculating some things with Flink which I later need
>>> for the transformations on the incoming data from the stream. So I want to
>>> broadcast the resulting datasets from the pre-calculations.
>>> Any ideas on how to best approach this?
>>> Thanks, cheers
>>> Tamara.

Tamara Mendt

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