[Ocfs2-users] Space used on file system although empty.

[Sunil Mushran]

http://oss.oracle.com/~smushran/.debug/scripts/stat_sysdir.sh

Run this script against the device and save the output to a file.

Then look at the inode_alloc:XXXX . There will be one for each slot.

    Bitmap Total: 18432   Used: 1114   Free: 17318

That's the number of inodes, used and free. Add these numbers for all slots
to get the full picture.


Guy wrote:
> Hi Sunil,
>
> 2009/11/13 Sunil Mushran <sunil.mushran at oracle.com 
> <mailto:sunil.mushran at oracle.com>>
>
>     OCFS2 has dynamic inode allocators. Meaning it does not allocate
>     space for inodes during
>     format but does so during runtime. However, once space has been
>     carved out for inodes, it
>     is not reclaimed back for data. So your bonnie++ run must have
>     created a lot of files.
>     That space will be reused when new files are created in the fs.
>     You can look at the system
>     directory using debugfs.ocfs2 to confirm my theory.
>
>
> Can you tell me how I'd get that particular bit of information from 
> debugfs.ocfs2? I'm afraid I'm not very familiar with it and the man 
> page isn't enlightening me at this point.
>
> Is there also a way I could calculate roughly how much space will go 
> to this based on the number of existing files on the current mailstore? 
>  
> Thanks
> Guy
>
> -- 
> Don't just do something...sit there!