[Ocfs2-users] Reproducing fragmentation and out of space error

[Nick Anderson]

On 05/31/2012 08:25 AM, Nick Anderson wrote:
> Is there some specific output from debugfs.ocfs that will tell me when I
> am approaching the situation?

 From an old bug report
> http://oss.oracle.com/bugzilla/show_bug.cgi?id=915#c10
> http://oss.oracle.com/bugzilla/show_bug.cgi?id=915#c24

I used the defaults when I created this filesystem.
debugfs.ocfs2 -R "stat //inode_alloc:0000" /dev/mapper/cm_shared_ocfs2 | 
grep "Clusters per"
         Clusters per Group: 1024   Bits per Cluster: 1

I thought that I could look at the global_bitmap and look at the Contig 
column and any time there were no values in that column that were 
greater than or equal to 1024 I should be seeing the error. But that 
cant be the case, right now I don't have any contig values over 400 and 
I am not getting the out of space error.

I must be mis-understanding something. Can someone clarify what I can 
look at to see the situation approach and know when I am in the state 
that produces the out of space error behavior?