[Lustre-discuss] maximum MDT inode count

[Daniel Leaberry]

We have ~1.4 billion inodes and we're using about 50 million. We use 
lots of small files so I took our highest utilization ever and doubled 
it. Better safe than sorry.

We did format with an inode every 1024 bytes because we use no striping.

--
Daniel Leaberry
Senior Systems Administrator
iArchives Inc.


Andreas Dilger wrote:
> For future filesystem compatibility, we are wondering if there are any
> Lustre MDT filesystems in existence that have 2B or more total inodes?
> 
> This is fairly unlikely, because it would require an MDT filesystem
> that is > 8TB in size (which isn't even supported yet) and/or has been
> formatted with specific options to increase the total number of inodes.
> 
> This can be checked with "dumpe2fs -h /dev/{mdtdev} | grep 'Inode count'"
> on the MDT.  
> 
> 
> If there are issues with privacy, please email me directly.  Otherwise,
> I think people would be interested to know what the larger MDT sizes
> are (even if they aren't as high as 2B inodes).
> 
> Cheers, Andreas
> --
> Andreas Dilger
> Sr. Staff Engineer, Lustre Group
> Sun Microsystems of Canada, Inc.
> 
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss