On 01/11/16 06:30, qq wrote: > > > [shred v8.20 sometimes takes 18min to shred 1G of /dev/sda, > but usually takes 20seconds, on my ironic minios container]
I'm not sure, but I suspect the issue is outside of shred. Note shred >= 8.21 enables direct IO which bypasses a lot of the system VM chicanery, and so may performance better for you.
