Is SDR agentless or agent based system ?
Agent based system. Trying to avoid all marketing nonsense about this topic, agentless systems are much simple to setup, indeed, but they often are confusing: they don’t list and define what probes are sent on each target and more complex because they use entirely the network to send-receive data. In majority of cases all agentless systems use Operating System utilities, like mpstat, vmstat to collect various metrics from each target. There is nothing innovative in such approach. SDR, on the other hand, has certain recorders which talk utilisation and saturation along with all the other OS metrics. As well SDR tries to stay simple and keep control over the raw data collected with minimal resources. Periodically the raw data is synced to a master site. You can experiment with SDR recorders and use them directly as custom probes, if you wish, in a agentless system. SDR recorders have been designed to operate no matter what the reporting side is.
