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Bug #8961

closed

du [directory] vs du -b [directory] size doubles

Added by Matt Hook over 9 years ago. Updated over 9 years ago.

Status:
Won't Fix
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
% Done:

0%

Source:
other
Tags:
Backport:
Regression:
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(FS):
Labels (FS):
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

Under cephfs using the kernel client, du -b shows an incorrect size.

I've also found that du --apparent-size shows this incorrectly as well.

For example, I have the following directory:

admin@desktop1:$ ls -l 370mo
total 373090
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy (2).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy (3).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy (4).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy (5).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy (6).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:37 7656_gsoc-tomato.win7.x64-48999 - Copy (7).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 07:19 7656_gsoc-tomato.win7.x64-48999 - Copy (8).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 06:36 7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (2).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 07:18 7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (3).7z
-rwxr-xr-x 1 www-data www-data 38204331 Feb 21 07:18 7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (4).7z

admin@desktop1:$ du -370mo
373090    370mo/

admin@desktop1:$ du -h 370mo/
365M    370mo/

admin@desktop1:$ du -b 370mo/
764086620    370mo/

admin@desktop1:$ du --apparent-size 370mo/
746179    370mo/

admin@desktop1:/370mo$ du --apparent-size *.7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (2).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (3).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (4).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (5).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (6).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (7).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy (8).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (2).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (3).7z
38204331    7656_gsoc-tomato.win7.x64-48999 - Copy - Copy (4).7z

Why does the size seem to double when using du on a directory vs the files themselves?
This bug exists in emperor release, and I just upgraded to firefly stable. The problem still exists.

uname -a

Linux desktop1 3.12.0-031200-generic #201311031935 SMP Mon Nov 4 00:36:54 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 12.04.4 LTS
Release: 12.04
Codename: precise

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 #1

Updated by Zheng Yan over 9 years ago

  • Status changed from New to Won't Fix

cephfs tracks recursive directory stats. A directory's size is space used by files underneath the directory. If you don't like this behaviour, you can disable it by 'norbytes' mount option.

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