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

[Wang,Yanfei(SYS)]

Hi,

Each node in cluster has same /etc/hosts, which is like:
[root at bb-nsi-ib04 pt2pt]# cat /etc/hosts
192.168.71.3 ib03
192.168.71.4 ib04
Currently, we have only 2 nodes available in RoCE cluster, IB03 and IB04.

BR

Thanks
Yanfei


发件人: Jonathan Perkins [mailto:perkinjo at cse.ohio-state.edu]
发送时间: 2014年3月31日 21:40
收件人: Wang,Yanfei(SYS)
抄送: mvapich-discuss
主题: Re: [mvapich-discuss] benchmark osu_bws run failed, on mvapich2-2.0rc1: gethostbyname: Unknown server error


Can you share the contents of the /etc/hosts file from each machine including the machine that you launch from?
On Mar 31, 2014 9:33 AM, "Wang,Yanfei(SYS)" <wangyanfei01 at baidu.com<mailto: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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