Performance Tweaks - Proxmox VE
https://pve.proxmox.com/wiki/Performance_Tweakscache=none seems to be the best performance and is the default since Proxmox 2.X. host don't do cache. guest disk cache is writeback Warn : like writeback, you can loose datas in case of a powerfailure you need to use barrier option in your linux guest fstab if kernel < 2.6.37 to avoid fs corruption in case of powerfailure.
ZFS on Linux - Proxmox VE
https://pve.proxmox.com/wiki/ZFS_on_LinuxZFS is a combined file system and logical volume manager designed by Sun Microsystems. Starting with Proxmox VE 3.4, the native Linux kernel port of the ZFS file system is introduced as optional file system and also as an additional selection for the root file system.
Proxmox VE ZFS Benchmark 2020
www.proxmox.com › en › downloadsDec 15, 2020 · Proxmox VE ZFS Benchmark with NVMe To optimize performance in hyper-converged deployments with Proxmox VE and ZFS storage, the appropriate hardware setup is essential. This benchmark presents a possible setup and its resulting performance, with the intention of supporting Proxmox users in making better decisions.