Re: btrfs-image run time

[Marc Haber]

On Mon, Mar 07, 2016 at 07:15:24PM +0100, Garmine 42 wrote:
> According to the manpage duplicate -s is valid and the high CPU usage is
> intended. Although a warning could be valid in case of -ss.

Or use a different letter. Anyway, that was my stupidity and no
developer time should be wasted for that. btrfs-image behaves as
documented, everything else was a problem existing between chair and
keyboard. Sorry for the noise.

Greetings
Marc

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Re: btrfs-image run time

[Hugo Mills]

On Mon, Mar 07, 2016 at 11:09:57AM -0700, Chris Murphy wrote:
> On Mon, Mar 7, 2016 at 10:38 AM, Marc Haber  
> wrote:
> > On Mon, Mar 07, 2016 at 06:27:17PM +0100, Marc Haber wrote:
> >> how long is btrfs-image taking to run on a 400 GiB filesystem?
> >>
> >> I have /bin/btrfs-image -s -t 8 -s /dev/mapper/mydevice - | pixz -9 >
> >> file.on.other.fs running for four hours now
> >
> > Strike my question please, I didn't see that I had the -s doubled.
> > With one -s I now see actual progress.
> 
> Could be worth a bug report and a patch to keep it from using
> duplicate switches.

   No, the duplicate -s is a valid part of the API.

   One -s will replace the filenames with random data. A second one
will attempt to find a replacement name that matches the CRC32 hash of
the filename. That's why it takes so long.

   Hugo.

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Re: btrfs-image run time

[Chris Murphy]

On Mon, Mar 7, 2016 at 10:38 AM, Marc Haber  wrote:
> On Mon, Mar 07, 2016 at 06:27:17PM +0100, Marc Haber wrote:
>> how long is btrfs-image taking to run on a 400 GiB filesystem?
>>
>> I have /bin/btrfs-image -s -t 8 -s /dev/mapper/mydevice - | pixz -9 >
>> file.on.other.fs running for four hours now
>
> Strike my question please, I didn't see that I had the -s doubled.
> With one -s I now see actual progress.

Could be worth a bug report and a patch to keep it from using
duplicate switches.

-- 
Chris Murphy
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Re: btrfs-image run time

[Marc Haber]

On Mon, Mar 07, 2016 at 06:27:17PM +0100, Marc Haber wrote:
> how long is btrfs-image taking to run on a 400 GiB filesystem?
> 
> I have /bin/btrfs-image -s -t 8 -s /dev/mapper/mydevice - | pixz -9 >
> file.on.other.fs running for four hours now

Strike my question please, I didn't see that I had the -s doubled.
With one -s I now see actual progress.

Greetings
Marc

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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
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btrfs-image run time

[Marc Haber]

Hi,

how long is btrfs-image taking to run on a 400 GiB filesystem?

I have /bin/btrfs-image -s -t 8 -s /dev/mapper/mydevice - | pixz -9 >
file.on.other.fs running for four hours now, and it's constantly
taking a single core, but is neither reading from the disk nor writing
to its output.

Is that expeced behavior?

Greetings
Marc

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Marc Haber | "I don't trust Computers. They | Mailadresse im Header
Leimen, Germany|  lose things."Winona Ryder | Fon: *49 6224 1600402
Nordisch by Nature |  How to make an American Quilt | Fax: *49 6224 1600421
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