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Posted to notifications@iotdb.apache.org by "Yuan Tian (Jira)" <ji...@apache.org> on 2023/02/13 03:12:00 UTC

[jira] [Created] (IOTDB-5525) Can't find device's data partition after partition fetcher

Yuan Tian created IOTDB-5525:
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             Summary: Can't find device's data partition after partition fetcher
                 Key: IOTDB-5525
                 URL: https://issues.apache.org/jira/browse/IOTDB-5525
             Project: Apache IoTDB
          Issue Type: Bug
          Components: Core/Engine
            Reporter: Yuan Tian
            Assignee: Yuan Tian


This issue records the following four things we meet in geely POC:

1. Previously, while calculating TTimeSlot for each SeriesSlot, we mistakenly replace previous one with current one which cause the TTimeSlot is incomplete for each SeriesSlot. In write case, we may get IndexOutOfBound error in the later phase.

2. Accelerate the distribution plan phase for {{{}group by level query{}}}, reducing time complexity from O(N^2) to O(N) for each data region

3. Correct the memory estimation for AggregationOperator.

4. Correct the default value for {{seriesPartitionExecutorClass}} from {{APHashExecutor}} to {{BKDRHashExecutor}} which is same as the one in config file.



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