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Posted to notifications@iotdb.apache.org by "Zesong Sun (Jira)" <ji...@apache.org> on 2020/04/20 05:21:00 UTC

[jira] [Created] (IOTDB-605) Add more levels of index in TsFileMetadata

Zesong Sun created IOTDB-605:
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             Summary: Add more levels of index in TsFileMetadata
                 Key: IOTDB-605
                 URL: https://issues.apache.org/jira/browse/IOTDB-605
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: Zesong Sun


Facing a scenario that one device has 300k measurements, when we read one time series in a TsFile, we need to deserialize 300k TimeseriesMetadata, which costs about 250ms (just for reading metadata of one tsfile). This may cause the query much slow.

As this scenario is not rare, I think this should be optimized by adding more indexes in TsFileMetadata.



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