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Because they can work without encryption.

rsync, rcp, nc etc

Freezing = save RAM to disk. I don't think PVE has this feature. I saw it in XEN a very long time ago, never used it after anymore.

Using dual-stack is better in such cases for failback in case of the problems. If you want be to sure, you can create pve test cluster as VMs.

Buy for example mikrotik router with wifi.

And you can think about changing from cron to systemd unit.

You are using 1 public IP for multiple servers hidden behind firewall with forwarded ports?

You can compare some things with https://forum.proxmox.com/threads/proxmox-ve-ceph-benchmark-2023-12-fast-ssds-and-network-speeds-in-a-proxmox-ve-ceph-reef-cluster.137964/unread

https://forum.proxmox.com/threads/how-can-i-mount-a-partition-of-a-vm-lvm.8280/#post-46823

Try lldpd, but it will show more info than just pve hostname.

4x1 TB SSDs arent't costly.

https://docs.ceph.com/en/quincy/rados/configuration/mon-osd-interaction/

Google for any iscsiadm tutorial. There can be multiple problems - target not connected, not allowed, some config missing, etc etc.

I have satadoms on supermicro and i hate it. I will rather buy extra sata card and normal ssds.

Proxmox will wait on boot because it will want to mount/enable encrypted partitions. You will need to use some customization in fstab/systemd to override such workflow for manual unlock.

From PVE 7 uses chrony by default as ntp client. Containers use host system time. Google https://discuss.linuxcontainers.org/t/how-do-i-run-ntp-in-a-privileged-container/16027 says, it's forbidden to change system time for lxc. So you need to make ntp server on something else.

My tips, select what is possible for you. All tips are based on 2x switch in stack for network redundancy: 0] buy another 2x(4x) 10Gbps card so you have 4x10Gbps 1] use 2x10Gbps LACP for VM 2] use 2x10Gbps LACP for Ceph or you can mix 1] 2] on 2x10Gbps LACP, if acceptable performance 3] 2x1Gbps...

You can check Kingston DC* models too, we are using them in combination with Intel S4*.

You need to decide if you want block backup (for example clonezilla) or file backup (for example borg). Both have their cons and prons. And you can use something as ansible to have changes vs default in git.

Thanks, that's what i need exactly. Uhm, there is no content option: So only way is to edit config file directly.