The use of raw images or optimizing the disk fs (mounting ext4 with a mix of noatime, nobarrier or barrier=0) does not have a global impact on the boot times (there are some gains booting the undercloud, but some losts with the overcloud)
The use of raw images or optimizing the disk fs (mounting ext4 with a mix of noatime, nobarrier or barrier=0) does not have a global impact on the boot times (there are some gains booting the undercloud, but some losts with the overcloud)