Nochmal - Nicht wir lassen cache weg, sondern das ist standard in unix libc!
Weil alles auch ohne gut funktioniert. Außerdem kannst du ja diese Dinge ganz einfach nachinstallieren.
Sorry, das is halt standard libc verhalten (kein DNS cache). Wenn man einen dns cache will/braucht kann man ja einen installieren... (systemd-resolved, ...)
With that setup, you have quorum as long a node 1 is online. So yes, you can start/stop/edit while the second node is offline. There is no risk for split-brain if you keep the votes that way.
Btw, this is easy to test...
Proxmox VE is a bare-metal hypervisor platform aimed at IT professionals and system administrators. It is not a product or service directed at children ...
a.) There are no initial or incremental/differential backups - only deduplicated backups.
b.) After stop/start, backup needs to read the whole disks, but backup are still fully deduplicated.
c.) backup data is deduplicated at the server side.