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AND NFS PERFORMANCE IS LINE SPEED, SO WE CONVERTED! In VM performance, gets LINE speed Reading and Writing to NFS server gets LINE speed VZDUMP is utter garbage over NFS

/etc/vzdump.conf # vzdump default settings tmpdir: /mnt/dump/vzdump /mnt/dump is a local drive /shrug Like I said, none of it makes any sense. When the systems were iSCSI they were just fine for VZDumps, we decided to migrate from iSCSI to NFS to keep it simple for HA here. But literally...

Backups of VMs running on the Shared storage, only get 35MB/sec When reading / writing to the NFS machine is 115MB/sec And when running a VM on a local drive backing it up to the NFS share is also 115MB/sec The problem is VM's running on shared NFS storage, only backup @ 35MB/sec

I understand the limit of the 1Gbps link, but we're not even getting half only during backups, which is locks the VM down in our cluster, and making maintenance a total bear. The NFS machine is a R710 TrueNASRC1 with a 310 in IT Mode, Raid10 via mirror + mirror stripe ZFS. And 2 SLOG SSD's...

I really wish someone could shed some light on this situation, it's extremely frustrating to backup vm's at these super slow speeds.

I've cloned VM's to RAW / QCOW2, no difference. It really seems there's an issue with "vzdump" itself. In VM performance is around 115MB/sec

NAS VM, to local dump HDD INFO: starting new backup job: vzdump 101 --storage dump --mode snapshot --remove 0 --node masamune --compress zstd INFO: Starting Backup of VM 101 (qemu) INFO: Backup started at 2020-09-16 12:23:18 INFO: status = running INFO: VM Name: Kotetsu INFO: backup mode...