We have a VMWare Esxi infrastructure, that uses NFS via gigabit ethernet to connect to a ReadyNAS device for VM storage, the servers themselves are quad core xeons with 32gb of RAM.
I've recently recreated our file server from scratch, and setup the NFS again on the NAS (we had a hardware failure and needed to store from backups, I recreated the server as our old VM image was having some issues anyway).
We use ShadowProtect server to take images of the VM's (can't use veam as we only have the free esxi) and normally it runs at 60-70 MB/s but after setting up the server and installing it it's running at 3 MB/s, and will take 4 days to backup our 1.3tb server. We have other VM's on there, that back up less data and weren't recreated, but they are running on the same NAS and run fine.
I've tested reading and writing a large file to the file server and thats fine, our network of 60 users is using it without complaints. I tried backing up our files using a robocopy of files in the last 2 days, however that took an extremely long time as well.
I then decided to try the server 2008 R2 backup feature, and that works fine, it backed up our 1.3tb in 6 hours, which is a good speed. I've checked all the settings in Shadow protect, and tried tweaking our NAS but can't see anything that could improve it.
My question is, what could it be given that we know :
- Server 2008 R2 backup runs fast
- Robocopy checking the MAXAGE runs slow
- Shadow Protect running its block level backups runs slow
