apache
Add downsapmling for ceresdb
Describe This Problem
At this stage, downsampling has become one of the basic capabilities in the field of time-series databases, which can solve problems such as excessive data volume returns under certain special circumstances (large time interval, high data set density).
CeresDB should support such a capability, at least in the immediate plans.
Proposal
The engine layer supports downsampling, and supports dynamic downsampling and configuration downsampling. Matching, clients in each language should also support such an API.
Notice：
- dynamic downsampling：Support can automatically adjust the sampling granularity according to the time interval.
- configuration downsampling：Rely on the user to provide the accuracy of the downsampling.
Additional Context
Thanks for suggestion.
Downsample is indeed important for time-series user-case, to support downsample an RFC maybe required to discuss
- pros and cons of downsample
- when query will use downsampled data
- how to run downsample job(in main server or some other background components).
- ....
- pros and cons of downsample
In most people's opinion, downsampling should have no disadvantages for time series data. Maybe I'm missing something, can anyone add here.