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L2ARC macht nur bei NVME/Optane sinn, relevant sind die IOPS. PVE kommt nun mit permanenten L2ARC dank ZFS 2.0

Bonding requires support from the switch. You have to configure static lag for balance-rr. Only active-backup works without but it's fail over no bonding.

try wipefs -a /dev/sdb does dmesg print any io errors ?

prune und garbage collection einrichten. https://pbs.proxmox.com/docs/backup-client.html#pruning-and-removing-backups

use apt full-upgrade

ha mit shared storage oder zfs replication. https://pve.proxmox.com/wiki/Storage https://pve.proxmox.com/wiki/High_Availability

Clearly authentication problem on your iscsi target.

In average TBW is exceeded by 3-5x times before errors occur. No need to start over, just add second disk, clone partition layout from old disk and randomize uuids. Add zfs partition to existing pool to convert it to raid1 and let it resilver. Setup esp sync for efi bootloader...

Well you have to limit zfs arc.

Since the destination has 0% loss there is no problem. What happens if you directly ping the pve node, 0% loss I assume. Dropping low ttl packets isn't a bad thing.

ZFS doesn't care about that, it writes information directly on the disk and scans all disks on startup. Pools will automatically be mapped even if id's change.

Du solltest das in die cron Datei schreiben ^^ Kopier einfach folgendes ins Terminal Fenster: cat << 'EOF' >> /var/spool/cron/crontabs/root @reboot sysctl -w vm.swappiness=1 EOF

Hast du swap per kernel option oder in einem cron job definiert ? Als workaround: crontab -e @reboot sysctl -w vm.swappiness=1

Poste mal die ausgabe von egrep -R "swappiness" /etc

You have to calculate "used" + "buff/cache" because that's what the vm actually uses. And it's exactly what proxmox reports. Disabling cache is not possible in linux, just don't over commit when using vm's. https://www.linuxatemyram.com/

vt-x is all you need go ahead and set it up. vt-d is for pcie passtrough, won't work on a laptop anyway.

I did benchmarks and pbs runs on basically everything. I use it on my synology nas in a vm. 1GB RAM and 1vcpu per pve node works fine. CPU is barely used and drive bandwidth is maxed out.

Efficiency is the same. Depends on the workload. Do you want to run many vm's (3700x) or have good single thread performance (5600x) ? https://www.cpubenchmark.net/compare/AMD-Ryzen-7-3700X-vs-AMD-Ryzen-5-5600X/3485vs3859

yeah

Create a datastore per pve and setup separate users for it.