Ext4 vs. Btrfs performance on Qubes OS installs

[Sven]

@Insurgo

@rustybird

Whereas file-reflink layouts like Btrfs use loop devices, which are currently always configured (by /etc/xen/scripts/block from Xen upstream) with 512 byte logical sectors - again passed through to the VM.

So @Sven
This seems to mean that the BRTFS pool

[user@dom0 ~]$ sudo qvm-pool
NAME          DRIVER
varlibqubes   file-reflink
linux-kernel  linux-kernel

While I don’t have any deep understanding of this topic I do have two identical laptops. One is my daily driver and the other is ‘standby’. So if there are concrete things you want me to try (even if they are potentially destructive) I am happy to try them out on the ‘standby’ T430. I might learn something in the process.

@Insurgo

As far as my understanding, LVM2 thin pool is beginning to have a bad press and people are starting to want to get away of it because of misconfiguration by default , where @Rudd-O pushes for ZFS, others push for XFS and here we push for BTRFS. I think if LVM pools and LUKS containers were configured in an optimized way, we might not all want to get out of it

Any recommendations on what to read to get a grip on LVM, LUKS, pools etc?