GNU bug report logs - #24850
need your help！strange problem.shred sometimes slow sometimes normal.

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: qq <276345114 <at> qq.com>
To: "bug-coreutils <at> gnu.org" <bug-coreutils <at> gnu.org>
Subject: need your help！strange problem.shred sometimes slow sometimes normal.
Date: Tue, 1 Nov 2016 14:30:45 +0800

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[Message part 2 (text/plain, inline)]

There is the information of my operation. You can see it wil take almost 18 minutes for 1G when it change slowly.

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Message #8 received at 24850 <at> debbugs.gnu.org (full text, mbox):

From: Pádraig Brady <P <at> draigBrady.com>
To: qq <276345114 <at> qq.com>, 24850 <at> debbugs.gnu.org
Subject: Re: bug#24850: need your help！strange problem.shred sometimes slow sometimes normal.
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.

Message #11 received at 24850 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: 24850 <at> debbugs.gnu.org
Subject: Re: bug#24850: need your help！strange problem.shred sometimes slow sometimes normal.
Date: Sun, 28 Oct 2018 01:16:43 -0600

close 24850
stop

(triaging old bugs)

On 2016-11-01 9:55 a.m., Pádraig Brady wrote:
> 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.

With no follow-ups in 2 years, I'm closing this bug.

-assaf

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