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SDV Telemetry Project |
Phase1 PoC
The IoTDB data model supports hierarchical paths for efficiency of data at scale. The model uses a dot notation. So for example a vehicle DB may have the hierarchy root.region.model.
This causes a challenge integrating VSS node paths which also use a dot notation. For example using the VSS node path Vehicle.CurrentLocation.Longitude as the timeseries key/measurement would cause Vehicle and CurrentLocation to be used in the hierarchy. When scaled across millions of vehicles this would cause inefficiency in storage and retrieval.
A simple solution is to quote the VSS node path and is what used here.
Example: Using the Go Client the VSS node Vehicle.CurrentLocation.Longitude is back quoted and suffixed to the IoTDB timeseries path, e.g. root.region.model.`Vehicle.CurrentLocation.Longitude`
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Starting IoTDB Cli
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_____ _________ ______ ______
|_ _| | _ _ ||_ _ `.|_ _ \
| | .--.|_/ | | \_| | | `. \ | |_) |
| | / .'`\ \ | | | | | | | __'.
_| |_| \__. | _| |_ _| |_.' /_| |__) |
|_____|'.__.' |_____| |______.'|_______/ version 1.2.2 (Build: 5d0bfb0)
Successfully login at iotdb-service:6667
IoTDB> select last `Vehicle.CurrentLocation.Longitude` from root.test2.dev1
+------------------------+---------------------------------------------------+--------+--------+
| Time| Timeseries| Value|DataType|
+------------------------+---------------------------------------------------+--------+--------+
|2024-02-01T19:57:37.604Z|root.test2.dev1.`Vehicle.CurrentLocation.Longitude`|-73.9873| FLOAT|
+------------------------+---------------------------------------------------+--------+--------+
Total line number = 1
It costs 0.177s
IoTDB>
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