HeLifu created KUDU-2566:
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Summary: support open-ended intervals & end up fetching one more
rowset than necessary
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
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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