Is there any reason reiser4 took this long on a large file delete process.

Is there any reason reiser4 took this long on a large file delete process.

[doiggl]

Hello,
Is there any reason reiser4 took this long on a large file delete process

- File size 4,237,037,568 openSUSE-DVD-Build0957-i586.iso

# time rm /media/disk/iso/openSUSE-DVD-Build0957-i586.iso

real    12m4.027s
user    0m0.000s
sys     1m10.132s

# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdb              1.8T  1.1T  662G  63% /media/disk

- The disk is in externally attached , uses usb
- gkrellm showed disk was busy at ~6mb a sec during file deletion
- The volume has a mix of 353,281 directories and files  in total

I use reiser4 enabled kernel details at [2]

[2]
https://build.opensuse.org/package/binaries?package=kernel-reiser4&project=home%3Adoiggl&repository=openSUSE_11.3
https://build.opensuse.org/package/show?package=kernel-reiser4&project=home%3Adoiggl


Thanks Glenn

Re: Is there any reason reiser4 took this long on a large file delete process.

[Jonáš Vidra]

On Sat, 05 Feb 2011 04:14:41 +0100 <doiggl@velocitynet.com.au> wrote:

> Hello,
> Is there any reason reiser4 took this long on a large file delete process
>
> - File size 4,237,037,568 openSUSE-DVD-Build0957-i586.iso
>
> # time rm /media/disk/iso/openSUSE-DVD-Build0957-i586.iso
>
> real    12m4.027s
> user    0m0.000s
> sys     1m10.132s

You use cryptcompress, right? A compressed file is AFAIK split into many
small fragments, which means that lots of records in the tree have to be
changed while deleting the file.

-- 
Jonáš Vidra, vidra.jonas@seznam.cz
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Re: Is there any reason reiser4 took this long on a large file delete process.

[Edward Shishkin]

On 02/05/2011 10:13 AM, Jonáš Vidra wrote:
> On Sat, 05 Feb 2011 04:14:41 +0100 <doiggl@velocitynet.com.au> wrote:
>
>> Hello,
>> Is there any reason reiser4 took this long on a large file delete process
>>
>> - File size 4,237,037,568 openSUSE-DVD-Build0957-i586.iso
>>
>> # time rm /media/disk/iso/openSUSE-DVD-Build0957-i586.iso
>>
>> real 12m4.027s
>> user 0m0.000s
>> sys 1m10.132s
>
> You use cryptcompress, right? A compressed file is AFAIK split into many
> small fragments, which means that lots of records in the tree have to be
> changed while deleting the file.
>

Unfortunately I don't know any good heuristic to detect
iso-files by content. So partition formatted with "ccreg40"
is not the best solution for media-files..

Edward.
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