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https://issues.apache.org/jira/browse/FLINK-3200?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek resolved FLINK-3200.
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Resolution: Fixed
Fix Version/s: 1.0.0
> Use Partitioned State Abstraction in WindowOperator
> ---------------------------------------------------
>
> Key: FLINK-3200
> URL: https://issues.apache.org/jira/browse/FLINK-3200
> Project: Flink
> Issue Type: Improvement
> Components: Streaming
> Affects Versions: 1.0.0
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Fix For: 1.0.0
>
>
> Right now, the WindowOperator uses snapshotState and restoreState to do
> custom serialization/deserialization of the windowing state. Moving this to
> partitioned state would allow us to re-scale in the future. Also, once the
> partitioned state has support to run on ManagedMemory/Out-of-core state the
> WindowOperator would also automatically benefit from this, allowing very
> large windows and large window state.
> The necessary steps are these:
> - Enhance state interface with new primitive states: ReducableState,
> ListState, etc.. Also make state scoped to a namespace. Namespaces are
> necessary because we need state that is scoped by key and by window (window
> would be the namespace in this case)
> - Enhance timer interface to also make timers scoped to a key/namespace
> - Change WindowOperator to use these new interfaces
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