13 Jul
2022
13 Jul
'22
2:10 a.m.
I have experienced the same performance problem in creating new template or creating new stateful image from template. I have traced it to the use of qemu-img convert which is very very slow. Currently a template creation on my setup, takes around 29m for a 45G image when a simple copy over NFS takes 1m26s over a 10G network which is expected since there is roughly as many read as write over the network (4Gbps) Adding --cache writeback to qemu-img improves from 29m to around 8m but according to a prior comment on this mailing list might not work on all platform. Hope that helps