a hybrid data
storage model is used in Wiki-Health to achieve high performance
in data access and operations. Sensor metadata and sensor data are
completely separate. The system uses MYSQL relational database
to store all user information, in addition to sensor metadata such as
sample rate, data format, sensor type and other Wiki-Health structured
data. All sensor readings, sensor data tags, and other types
of sensor data are stored in the non-relational database and CACSS
Cloud Storage System