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How to lower your homelab Proxmox power consumption
(sleeplessbeastie.eu)
Proxmox VE is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality, on a single platform. With the integrated web-based user interface you can manage VMs and containers, high availability for clusters, or the integrated disaster recovery tools with ease.
Solid list. Two more for a ZFS-based box: cap zfs_arc_max explicitly if idle RAM usage matters, ZFS will happily eat most of your RAM for ARC and won't always release it cleanly, keeping memory controllers busier than needed at idle. And check hdparm -B / hd-idle for spinning drives not in constant use, letting them actually spin down makes a bigger power dent than people expect.
Spindown and spinup unfortunately have wear on the drives and ever since I killed a bunch of desktop WD green drives that way back in the day, I'm too scared to reemable this on my (now 100TB+) NAS.