sactions. According
to the sample rule, all events that are older than 24 hours become
irrelevant. We are looking at a window of data that constantly moves and
where stale transactions need to be constantly moved out of scope (in
other words, cleaned up from state).</p>
<center>
<img src="/img/blog/patterns-blog-3/window-clean-up.png" width="400px" alt="Figure 3: Window Clean-up"/>
<br/>
<i><small>Figure 3: Window Clean-up</small></i>
</center>
<br/>
<p>We will
<a href="//nightlies.apache.org/flink/flink-do