Andrew Wong updated KUDU-2278:
    Target Version/s: 1.8.0

> Improve IO for writing deltas
> -----------------------------
>                 Key: KUDU-2278
>                 URL: https://issues.apache.org/jira/browse/KUDU-2278
>             Project: Kudu
>          Issue Type: Improvement
>          Components: cfile, tablet
>            Reporter: Andrew Wong
>            Priority: Major
> Today, writing new deltas entails rewriting entire tablet metadata files in 
> order to track the newly-created block ids. Even if the delta were on the 
> order of kilobytes, the tablet metadata files could be on the order of 
> megabytes, so the relative cost for this small amount of data is quite high, 
> considering the amount of the metadata.
> This could be improved by batching such delta flushes, or by revamping tablet 
> metadata entirely to batch any operations that require metadata updates.

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