Caching and Dumping Locations On The ShadowDevice
Understanding Caching and Dumping Locations
Caching Locations: Caching refers to the temporary storage of location data on the device itself when it is unable to send this data to the server in real-time. This situation can arise due to network connectivity issues. The device continues to collect and store location data at predefined intervals.
Dumping Locations: Once the device re-establishes a connection with the server, it "dumps" or transmits all the cached location data to the server. This process is usually done in a batch to minimize the number of transmissions and reduce network load and power consumption.
Example: 1-Minute Location Intervals
- Observation: A ShadoWatch is set to record locations every minute and stopped communicating but continued to log locations, dumping about 75-95 locations after approximately 1.5 hours.
- Analysis: Given this behavior, we can deduce that the device's cache can hold roughly 75-95 data points. The device continued to record locations at each minute, utilizing its cache capacity until it could offload this data.
Scaling with Different Location Intervals
- If the location recording interval is increased (e.g., to every 5 minutes), the cache would be filled at a slower rate. This is because fewer data points are being generated over the same period.
- Using the observed behavior as a benchmark, if a 1-minute interval results in a cache limit of 1.5 hours (90 minutes), then a 5-minute interval could potentially extend the cache duration to 6 hours (90 minutes x 5).
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