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https://issues.apache.org/jira/browse/FLINK-4854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Flink Jira Bot updated FLINK-4854:
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Labels: auto-deprioritized-major auto-unassigned features stale-minor
(was: auto-deprioritized-major auto-unassigned features)
I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help
the community manage its development. I see this issues has been marked as
Minor but is unassigned and neither itself nor its Sub-Tasks have been updated
for 180 days. I have gone ahead and marked it "stale-minor". If this ticket is
still Minor, please either assign yourself or give an update. Afterwards,
please remove the label or in 7 days the issue will be deprioritized.
> Efficient Batch Operator in Streaming
> -------------------------------------
>
> Key: FLINK-4854
> URL: https://issues.apache.org/jira/browse/FLINK-4854
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Reporter: Xiaowei Jiang
> Priority: Minor
> Labels: auto-deprioritized-major, auto-unassigned, features,
> stale-minor
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> Very often, it's more efficient to process a batch of records at once instead
> of processing them one by one. We can use window to achieve this
> functionality. However, window will store all records in states, which can be
> costly. It's desirable to have an efficient implementation of batch operator.
> The batch operator works per task and behave similarly to aligned windows.
> Here is an example of how the interface looks like to a user.
> {code}
> interface BatchFunction {
> // add the record to the buffer
> // returns if the batch is ready to be flushed
> boolean addRecord(T record);
> // process all pending records in the buffer
> void flush(Collector collector) ;
> }
> DataStream ds = ...
> BatchFunction func = ...
> ds.batch(func);
> {code}
> The operator calls addRecord for each record. The batch function saves the
> record in its own buffer. The addRecord returns if the pending buffer should
> be flushed. In that case, the operator invokes flush.
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