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https://issues.apache.org/jira/browse/KUDU-2566?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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HeLifu updated KUDU-2566:
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Summary: Enhance rowset tree pruning (was: support open-ended intervals &
end up fetching one more rowset than necessary)
> Enhance rowset tree pruning
> ---------------------------
>
> Key: KUDU-2566
> URL: https://issues.apache.org/jira/browse/KUDU-2566
> Project: Kudu
> Issue Type: Improvement
> Components: tablet, util
> Affects Versions: 1.0.0
> Reporter: HeLifu
> Priority: Major
>
> In function of 'Tablet::CaptureConsistentIterators' of tablet.cc, there are
> two TODO:
> 1.TODO(todd): support open-ended intervals:
> In our kudu source code, we just cull row-sets when lower_bound_key and
> exclusive_upper_bound_key are existing at the same time. And if not, we will
> grab all row-sets of the tablet, then have to seek the key in
> ‘CFileSet::Iterator::PushdownRangeScanPredicate’ for the unnecessary row-sets
> (which will waste disk io).
> 2.TODO(todd): the upper bound key is exclusive, but the RowSetTree function
> takes an inclusive interval. So, we might end up fetching one more rowset
> than necessary.
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