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https://issues.apache.org/jira/browse/SAMZA-650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14527316#comment-14527316
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Guozhang Wang commented on SAMZA-650:
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[~nickpan47] Could you add the RB link for this ticket for reviews?
> Implement window metadata store
> -------------------------------
>
> Key: SAMZA-650
> URL: https://issues.apache.org/jira/browse/SAMZA-650
> Project: Samza
> Issue Type: Sub-task
> Components: sql
> Reporter: Yi Pan (Data Infrastructure)
> Assignee: Yi Pan (Data Infrastructure)
>
> In SAMZA-552, window operator is designed to have a window metadata store
> internally to keep all windows' metadata in retention. This metadata store
> should be a KV store w/ a changelog (i.e. LoggedStore), with the following
> definition of key and value:
> # Time-based window metadata store:
> ## Key: window start timestamp
> ## Value: {start_time, start_offset, end_time, last_offset}
> # Tuple-based window metadata store:
> ## Key: window start offset
> ## Value: {start_offset, last_offset}
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