In Graphite storage schema retention is configured as:
"10s:1d,1m:30d"
And aggregation methods of min, max, sum, average.
Question: When viewing the charts/graphs where you see what retention and aggregation method Graphite is using?
Graphite's retentions and aggregation methods are not visible on graphs because it doesn't belong to graphs - it belongs to individual metrics, and the graph can contain many metrics.
You can run whisper-info.py
a tool with metrics wsp-file - then you'll get which retention and aggregation it has. But usually, your wsp files have same retention / aggeregation which were described in configs.