Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

From: George Bosilca (bosilca_at_[hidden])
Date: 2007-10-31 19:07:01


For some version of Open MPI (recent versions) you can use the
btl_tcp_disable_family MCA parameter to disable the IPv6 at runtime.
Unfortunately, there is no similar option allowing you to disable IPv6
for the runtime environment.

   george.

On Oct 31, 2007, at 6:55 PM, Tim Prins wrote:

> Hi Clement,
>
> I seem to recall (though this may have changed) that if a system
> supports
> ipv6, we may open both ipv4 and ipv6 sockets. This can be worked
> around by
> configuring Open MPI with --disable-ipv6
>
> Other then that, I don't know of anything else to do except raise
> the limit
> for the number of open files.
>
> I know it doesn't help you now, but we are actively working on this
> problem
> for Open MPI 1.3. This version will introduce a tree routing scheme
> which
> will dramatically reduce the number of open sockets that the runtime
> system
> needs.
>
> Hope this helps,
>
> Tim
>
> On Tuesday 30 October 2007 07:15:42 pm Clement Kam Man Chu wrote:
>> Hi,
>>
>> I got a "Too many open files" error while running over 1024
>> processes
>> on 512 cpus. I found the same error on
>> http://www.open-mpi.org/community/lists/users/2006/11/2216.php, but I
>> would like to know whether it is another solution instead of changing
>> limit descriptors. The limit descriptors is changed by root access
>> and
>> needs to restart the system that I don't want to.
>>
>> Regards,
>> Clement
>
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users



  • application/pkcs7-signature attachment: smime.p7s