[Lustre-discuss] Lustre 1.6.2 + 2.6.18 - Directory index full!

Niklas Edmundsson Niklas.Edmundsson at hpc2n.umu.se
Thu Sep 27 07:10:16 PDT 2007

On Thu, 27 Sep 2007, Andreas Dilger wrote:

> On Sep 27, 2007  10:53 +0200, Niklas Edmundsson wrote:
>> We have 13701222 files in one directory, and creating more files there
>> fails even though we have lots of free inodes in the filesystem.
> We generally only test up to 10M files in a single directory.  If you had
> a perfect hash distribution you might be able to get to 25M files in the
> directory.

I suspected something like that. The error message needs some help 
though, I'd prefer having the directory in question in there if 
possible, or at least some hint on where to look.

>> On MDS we get this in the kernel log:
>> [692361.061558] LDISKFS-fs warning (device sdb2): ldiskfs_dx_add_entry: Directory index full!
> This is one of the reasons we are moving to ZFS for the back-end storage.

Any idea on the timeframe?

  Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se     |    nikke at hpc2n.umu.se
  Good girls go to heaven..bad girls go EVERYWHERE!!!

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