Re: [Moosefs-users] 回复： Wrong disk usage in mfs cgi monitor and "df -h"

[Davies L. <dav...@gm...>]

Hi, Bobbin, 

XFS may be better. We use it as default fs.

Davies 

在 2011-4-21，下午8:45， boblin 写道：

> Hi michal & youngcow :
>  
> Actually I almost reinstall the whole entire MooseFS system ,and still got the same result.
>  
> Now I think may be what youngcow had said is right (mke2fs take 5% space).
>  
> At the very fist time (just after I mount the mfs system and before I create any files) ,It alreay cost 5%,
>  
> but the whole /data1/chunkdata only cost 2MB disk space .
>  
> chunk-140-242:/data1/chunkdata # find /data1/chunkdata/ -type f
> /data1/chunkdata/.lock
> chunk-140-242:/data1/chunkdata #
>  
> chunk-140-242:/data1/chunkdata # ls -al /data1/chunkdata/* | awk '{ a+=$5; } END {print a/1024/1024"MB";}'
> 2MB
> chunk-140-242:/data1/chunkdata #
>  
>  
> <694...@1C...g>
>  
> As we know , mke2fs will steal 5% precent space which reservced for superblock .
>  
> Could it be the reason ?
>  
> master-140-244:~ # mke2fs -j /dev/cciss/c0d1p1
> mke2fs 1.38 (30-Jun-2005)
> Filesystem label=
> OS type: Linux
> Block size=4096 (log=2)
> Fragment size=4096 (log=2)
> 89604096 inodes, 179177276 blocks
> 8958863 blocks (5.00%) reserved for the super user
> First data block=0
> 5469 block groups
> 32768 blocks per group, 32768 fragments per group
> 16384 inodes per group
> Superblock backups stored on blocks: 
>         32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
>         4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
>         102400000
> Writing inode tables: done                            
> Creating journal (32768 blocks): done
> Writing superblocks and filesystem accounting information: done
> This filesystem will be automatically checked every 35 mounts or
> 180 days, whichever comes first.  Use tune2fs -c or -i to override.
> master-140-244:~ #
>  
>  
> ------------------ 原始邮件 ------------------
> 发件人: "youngcow"<you...@gm...>;
> 发送时间: 2011年4月21日(星期四) 下午4:04
> 收件人: "Michal Borychowski"<mic...@ge...>;
> 抄送: "'boblin'"<ai...@qq...>; "moosefs-users"<moo...@li...>;
> 主题: Re: [Moosefs-users] Wrong disk usage in mfs cgi monitor and "df -h"
>  
> I think the reason is filesystem uses some space when you format it.
> 
> > Hi!
> >
> > That really looks a bit strange. We’d blame difference between 'df -h
> > /data1' and 'du -sh /data1/chunkdata' on the operating system, and it
> > has nothing to do with MooseFS (maybe some difference between protocols
> > in kernel or some tools?). What is your operating system? If ‘df’ and
> > ‘du’ give wrong values it may be cause of other inconsequences.
> >
> > And when you make this command: "ls -al /data1/chunkdata/*/*" – how many
> > “chunk…mfs” files do you have? What is the sum of their sizes? Do
> > something like this:
> >
> > ls -al /data1/chunkdata/*/* | awk '{ a+=$5; } END {print a;}'
> >
> > it should give the sum of files sizes in bytes.
> >
> > Regards
> >
> > Michal
> >
> > *From:*boblin [mailto:ai...@qq...]
> > *Sent:* Wednesday, April 20, 2011 7:18 PM
> > *To:* Michal Borychowski
> > *Subject:* Re:RE: RE: [Moosefs-users] Wrong disk usage in mfs cgi
> > monitor and "df -h"
> >
> > hi Michal ：
> >
> > Now I've got a problem about disk usage , "df -h" shows that partition
> > "/data1" used space is 130M . But "du -hs *" shows only
> >
> > 1.1M。And the most crazy thing is that it show 35GB in cgi monitor ！！
> > All my 3 chunkserver have the same problem .
> >
> > I had read the FAQ and found the "df -h" question ( N * 256 * num_of_hdd
> > increased by disk usage），it doesn't help ...
> >
> > How can I know the exactlly disk usage ?
> >
> >
> >
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> 
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