Subject: bug#24850: need your help！strange problem.shred sometimes slow sometimes normal.

From: Pádraig Brady <[email-masked]>
Date: Tue, 1 Nov 2016 15:55:59 +0000

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.