Yanzhe An created IOTDB-164:
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Summary: Convert Path(String) to ID(Long)
Key: IOTDB-164
URL: https://issues.apache.org/jira/browse/IOTDB-164
Project: Apache IoTDB
Issue Type: Improvement
Reporter: Yanzhe An
Attachments: path示例.png
Now in IoTDB, paths of time series are in the form of *String*. The path of a
time series contains the information of its storage group, device, and
measurement.
!path示例.png!
However, the fact shows that there may be overlaps between paths. For example,
time series belonging to the same storage group _sg123_ must be prefixed with
the name of _sg123_. It can cause the problem of wasted space. By contrast,
*Long* takes much less space than *String*.
What's worse, paths are usually put into the *Map* structure to carry out other
operations. It can cause the problem of wasted time. By contrast, when carrying
out operations of _put_, _get_, and _remove,_ *Map<Long, Integer>* performs
better than *Map<String, Integer>*.
Therefore in IoTDB, paths in the form of *String* should be replaced by IDs in
the form of *Long*.
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