[Lustre-discuss] ls does not work on ram disk for normal user

Thomas Roth t.roth at gsi.de
Wed Sep 22 01:57:41 PDT 2010

Hi Michael,

"Identifier removed" occured to me when the user data base was not accessible by
the MDS - when the MDS didn't know about any normal user. "root" is of course known
there, but what does e.g. "id mkluge" say on your MDS?


On 09/22/2010 10:29 AM, Michael Kluge wrote:
> Hi all,
> I have a 1.8.3 running on a couple of servers connected via IB to a
> small cluster. To test the network performance I have one MDS and 14 OST
> residing in ram disks. One the client it is mounted on /lustre.
> I have a file in this directory (created as root and then chown'ed to
> 'mkluge'):
> mkluge at r2i0n0:~>  ls -la /lustre/dfddd/ball
> -rw-r--r-- 1 mkluge zih 14680064000 2010-09-22 10:14 /lustre/dfddd/ball
> mkluge at r2i0n0:~>  cd /lustre/dfddd/
> mkluge at r2i0n0:/lustre/dfddd>  ls
> /bin/ls: .: Identifier removed
> mkluge at r2i0n0:/lustre/dfddd>  ls -la
> /bin/ls: .: Identifier removed
> Has anyone an idea what this could be? I can't event create a directory
> in /lustre
> mkluge at r2i0n0:~>  mkdir /lustre/ww
> mkdir: cannot create directory `/lustre/ww': Identifier removed
> 'root' is able to create the directory. Setting permissions to '777' or
> '1777' does not help either.
> The MDS was formated to use mgt and mgs from the same ram device.
> Regards, Michael
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Thomas Roth
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