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  1. Kudu
  2. KUDU-2567

Cull rowsets for open-ended queries

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 1.7.1
    • Fix Version/s: n/a
    • Component/s: tablet
    • Labels:
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    • Target Version/s:

      Description

      The rowset tree only supports culling rowsets when there's both a PK upper bound and a PK lower bound. So, for example, on a tablet partitioned by arrival time, doing a query for all rows that arrived since yesterday involves creating iterators for every rowset, instead of only the rowsets that satisfy the primary key bound. Normally, this isn't such a big deal since the scan will immediately see from the key index that the rowset doesn't have any results, but in some cases (like if due to KUDU-1400 there are a lot of small rowsets), the time spent opening extra rowsets can make the initial scan request take a long time.

      It should be fairly straightforward to enhance the rowset tree to handle intervals open on either end.

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            • Assignee:
              Unassigned
              Reporter:
              wdberkeley William Berkeley
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                Updated:
                Resolved: