I recently had a project with Veeam One v9 update 1 monitoring a Hyper-V 2012 (non R2) cluster. I wanted to see if i could show the disk latency throughout the cluster. The cluster is using iSCSI attached CSV volumes, arround 10 of them.
When i check the "Disk/CSV2012: Write Latency" (or Read Latency) counter at combined CSV Level, i get presented quite high latency values (30-50ms) on avarage. Drilling down to individual CSV volumes and looking at the same counter, values are much lower (<5ms). I almost seems like when i select the parent level of the CSV tree in the Monitor client, the client adds up all latency and shows a cumulative latency graph. I'm i looking at this wrong or....?
I basically could not explain why i'm seeing lower latency at the individual CSV level (all of them) compared to the parent level in the Monitor tree.
Veeam Certified Engineer