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porli, where are you from? is that your server?

I didn't check the source code, but I assume that the mount is done using /dev/sr0 which will never match the stick device path.

Can't you temporary get an USB CD-ROM?

Your SSD log has nothing to do here, because you are doing async writes. Again, if you want to benchmark disks, do not do /dev/zero to a compressed pool. Also, if you need help, please define your system configurations as A, B, C and so on. This new test on "the same system" is not very...

Did you understand what I've said? You are benchmarking LZ4 performance on your CPU because you are writing /dev/zero to a compressed dataset. If you want to to disk benchmarks, create a dataset with compression=off and try again.

You didn't specify what type of dual intel xeon you have. You've measured the CPU here because you are dd-ing /dev/zero to a lz4 compressed dataset.

No, I didn't need time because "dd" outputs this information :) So: - your NFS raw bandwidth is ~100MB/sec, as expected - initial phase of the dump does not touch the disks because of the cache, as vmstat shows low activity The CPU usage is very low, so the feed rate to the compressor is low...

Does Proxmox have any IRC channel on freenode? It helps with this kind of issues. Forum is too "off-line".

dd if=/dev/zero of=/mnt/pve/Backups/dump/test.bin bs=1024k count=1000

apt-get install sysstat for *iostat* command

Do you mind posting the pool configurations of the two systems? Also, the output of zfs get all rpool

Please post the output (10-20 lines) of below commands while doing the slow backup: iostat -kxz 1 vmstat 1

He said "drive".

Sure you will, as dietmar said. It will not be available in the installer phase (you will need to install Promox itself on another drive, even USB SSD - not stick) and then you can import your RAID volume with no issues.

Cluster without HA features: - single management UI - live/offline VM migration To be honest, I see platform level HA as ancient and obsoleted. Automatically starting the VM somewhere else is pretty useless in most cases I've encountered (of course not all). Examples: - Databases: you do...

Confirmed to crash Windows VMs on SmartOS with KVM, too. Luckily these are low-activity, ZFS snapshotted VMs, so rollback was easy.

You don't live here, are you? https://en.wikipedia.org/wiki/Pripyat :)

sure, your device will be /dev/vda. best thing is to use UUIDs for fstab blkid | grep vda1 in /etc/fstab you will put UUID=<the UUID from above> instead of /dev/vda1

you replace this: bootdisk: virtio0 virtio0: default:100/vm100-disk-2.qcow2,size=55G Basically you replace in the file "ide0" with "virtio0" and pray that you guest kernel is virtio aware (usually they are). There is a single reason to use IDE: a guest OS that doesn't know anything else...

Post your conf file first. You will have to edit it by hand. It is in /etc/pve/qemu-server/<VMID>.conf