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 featureĀ 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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