[mvapich-discuss] benchmark osu_bws run failed, on mvapich2-2.0rc1: gethostbyname: Unknown server error

[Hari Subramoni]

Hello Yanwei,

When you are running MVAPICH2 in a RoCE environment, you need to use set "
MV2_USE_RoCE=1"

eg: mpirun_rsh -np 2 -hostfile <hostfile> MV2_USE_RoCE=1 prog

Please refer to the following section of our userguide for more details.

http://mvapich.cse.ohio-state.edu/support/user_guide_mvapich2-2.0rc1.html#x1-370005.2.7

Please let us know if this solves your issue.

Regards,
Hari.


On Mon, Mar 31, 2014 at 9:31 AM, Wang,Yanfei(SYS) <wangyanfei01 at baidu.com>wrote:

>  Hi，
>
>
>
> I am a fresh learner of MPI, and just try to do some verification on
> mVAPICH2 library on RoCE armed with mvapich2-2.0rc1 on
> MLNX_OFED_LINUX-2.1-1.0.6-rhel6.3-x86_64.
>
>
>
> Could you give me some tips to fix this following issues.
>
>
>
> Configuration:
>
> [root at bb-nsi-ib04 pt2pt]# cat hosts_mvapich
>
> ib03:1
>
> ib04:1
>
> [root at bb-nsi-ib04 pt2pt]# cat /etc/hosts
>
> 192.168.71.3 ib03
>
> 192.168.71.4 ib04
>
>
>
> ERROR:
>
> [root at bb-nsi-ib04 pt2pt]# mpirun_rsh -np 2 --hostfile hosts_mvapich osu_bw
>
> gethostbyname: Unknown server error
>
> [bb-nsi-ib04.*.com:mpirun_rsh][child_handler] Error in init phase,
> aborting! (0/2 mpispawn connections)
>
> gethostbyname: Unknown server error
>
> [root at bb-nsi-ib04 pt2pt]#
>
>
>
> It could be caused by wrong configuration. Before on same platform I have
> do verification on OpenMPI with same RoCE configurations and similar host
> configurations.
>
>
>
> Thanks.
>
> -Yanfei
>
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>
>
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