Hey Oleg,

Thanks for your quick response !

I created MGS, MDT and two OSTs before I started lustre service on both computer - is it possible that the error is shown only the first time starting the service ?

On Thu, Sep 18, 2014 at 1:27 PM, Drokin, Oleg <oleg.drokin@intel.com> wrote:

Hello!

On Sep 18, 2014, at 5:37 AM, Dennis Zheleznyak wrote:

> 3. Created MGS and MDT:
> mkfs.lustre --mgs /dev/sdb
> mkfs.lustre --mdt --mgsnode=1.1.1.125@tcp0 --network=tcp0 --fsname=fs01 --index=0 /dev/sdc

You also need at least one (but possibly more) OSTs - the place where the actual data is stored.

> 4. Updated /etc/ldev.conf
> mgs - MGS /dev/sdb -
> mgs - fs01:MDT0000 /dev/sdc -
>
> 5. Started Lustre:
> service lustre start MGS
> service lustre start fs01:MDT0000
>
> 6. And getting the following error:
> Sep 18 12:29:03 localhost kernel: LustreError: 11-0: fs01-MDT0000-lwp-MDT0000: Communicating with 0@lo, operation mds_connect failed with -11.

Yup, that's what you get if you don't have any OSTs.

Bye,
Oleg