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Posted to dev@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2016/02/08 17:16:39 UTC
[jira] [Created] (FLINK-3370) Add an aligned version of the window
operator
Stephan Ewen created FLINK-3370:
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Summary: Add an aligned version of the window operator
Key: FLINK-3370
URL: https://issues.apache.org/jira/browse/FLINK-3370
Project: Flink
Issue Type: Improvement
Components: Windowing Operators
Affects Versions: 1.0.0
Reporter: Stephan Ewen
The windowing operators currently follow a generic implementation for support of unaligned windows.
We can gain efficiency by creating a variant that is optimized for aligned windows:
- Aligned windows can use aligned triggers, which keep no per-key state
- Less trigger state means less checkpointing data
- Based on the aligned windows, we can create sliding event time windows that do not replicate data into the different overlapping windows
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