Ok, but what is the "reallife difference" between the two?
Does that mean that as long as datastore latency observed by vms is low/zero there is no latency issue?
The reason I'm asking is I have a customer with a brand new storage system.. and they see spikes in latency.. Some extremely high as noted in another thread here.. I will try R2 and see if that changes, while some are "just" 80-200 ms high.. but the datastore latency ombserved by vms in that environment is 0 on all datastores(all are on Enterprise-class FC-disk).
While in my lab witch has a 3 year old FC-storage .. I see very little spikes in latency.. but Datastore latency observed by vms is quite high..: https://dl.dropboxusercontent.com/u/112 ... atency.png