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https://issues.apache.org/jira/browse/KUDU-2278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16377387#comment-16377387
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Adar Dembo commented on KUDU-2278:
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The same is true for flushing an MRS, right? I would imagine that like MRS
flushes, DMS flushes are deferred until the DMS is sufficiently "meaty". Is the
DMS flush policy different than the MRS flush policy?
> 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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