flink-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Piyush Shrivastava <piyush...@yahoo.co.in>
Subject Re: Understanding Sliding Windows
Date Wed, 27 Apr 2016 05:01:39 GMT
Hello Dominik,
Thanks for the information. Since my window is getting triggered every 10 seconds, the results
I am getting before 5 minutes would be irrelevant as I need to consider data coming in every
5 minutes. Is there a way I can skip the results that are output before the first 5 minutes?
Thanks and Regards,Piyush Shrivastava

    On Tuesday, 26 April 2016 8:54 PM, Dominik Choma <dominik.choma@gmail.com> wrote:


You created sliding window witch is triggered every 10 seconds
Flink fires up this window every 10 seconds, without waiting at 5 min buffer to be filled
It seems to me that first argument is rather "maximum data buffer retention" than " the initial



2016-04-26 12:16 GMT+02:00 Piyush Shrivastava <piyushjoy@yahoo.co.in>:

Hi all,I wanted to know how exactly sliding windows produce results in Flink.Suppose I create
a sliding window of 5 minutes which is refreshed in every 10 seconds:
.timeWindow(Time.minutes(5), Time.seconds(10))
So in every 10 seconds we are looking at data from the past 5 minutes. But what happens before
the initial 5 minutes have passed?Suppose we start the computation at 10:00. At 10:05 we will
get the result for 10:00-10:05. But what are the results which we get in between this? i.e.
at 10:00:10, 10:00:20 and so on.Basically why do Flink start producing results before the
initial threshold has passed? What do these results signify? Thanks and Regards,Piyush Shrivastava

View raw message