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Posted to dev@iotdb.apache.org by "Tian Jiang (JIRA)" <ji...@apache.org> on 2019/07/17 11:19:00 UTC

[jira] [Created] (IOTDB-143) Support merge

Tian Jiang created IOTDB-143:
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             Summary: Support merge
                 Key: IOTDB-143
                 URL: https://issues.apache.org/jira/browse/IOTDB-143
             Project: Apache IoTDB
          Issue Type: New Feature
            Reporter: Tian Jiang


Merge (or compaction) is an important feature of LSM or LSM-like systems and IoTDB depends on it to put the data in the sequential files and unsequential files together and make them ordered and non-duplicated again.

Merged data files provide better locality and potentially higher compression rate (for some of the missing values are supplemented). While merging interacts with many aspects of IoTDB like ingestion and query, finding an effective implementation may be rather difficult.



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