Status

Current state:  [One of "Under Discussion", "Accepted", "Rejected"] Draft

Discussion thread: here [Change the link from the KIP proposal email archive to your own email thread]TBD

JIRA: here [Change the link from KAFKA-1 to your own ticket]TBD

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

Motivation

TopK is very commonly supported feature in SQL-like queries, and widely used in tech and non-tech industry alike. For example, a blog site owner would like to know the top 5 active authors posting blogs:

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