Andrew Wong created KUDU-2278:
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Summary: 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
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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