When OA / SiteScope send the metric data to COSO Platform,please tell me what kind of processing is done on each of the COSO servers.

When OA / SiteScope send the metric data to COSO Platform,Please tell me what kind of processing is done on each of the following COSO servers.

COSO Master Node
COSO Worker Node
COSO NFS Node
COSO Posgre Database Node
COSO Reporting, Vertica Node