[mpich-discuss] how to run jobs using IPv6?

[Shuwei Zhao]

Hi yanfei
Thanks for creating the ticket.
Do you have any idea on how long this ticket will be handled and closed?
I think for this ticket the code change should not be big. This feature is
pretty urgent for my team.
Thanks

On Wed, 6 Dec 2017 at 12:07 Guo, Yanfei <yguo at anl.gov> wrote:

> I have created an ticket to track it.
> https://github.com/pmodels/mpich/issues/2889
>
> Yanfei Guo
> Assistant Computer Scientist
> MCS Division, ANL
>
>
>
> On 12/6/17, 11:52 AM, "Shuwei Zhao" <shuweizhao1991 at gmail.com> wrote:
>
> Are you going to use getaddrinfo instead to deprecate gethostbyname?
>
>
> Thanks
>
> On Wed, 6 Dec 2017 at 11:50 Guo, Yanfei <yguo at anl.gov> wrote:
>
>
> Hi Shuwei,
>
> The communication over IPv6 network is supported as long as the
> lower-level network library supports it. However, MPICH uses gethostbyname
> to translate hostnames to addresses in order to initialize the link which
> is not working on pure IPv6.
>
> Yanfei Guo
> Assistant Computer Scientist
> MCS Division, ANL
>
>
>
> On 12/6/17, 11:46 AM, "Shuwei Zhao" <shuweizhao1991 at gmail.com> wrote:
>
> Hi Yanfei，
>
>
> I ask this question months ago，but I was told IPv6 is supported in mpich
> 3.*. So it's not supported?
>
>
> Thanks
> Shuwei
>
> On Wed, 6 Dec 2017 at 11:24 Guo, Yanfei <yguo at anl.gov> wrote:
>
>
> Hi Carlos,
>
> MPICH currently uses gethostbyname which does not support IPv6, therefore
> it won’t work on a pure IPv6 network.
>
> Best,
>
> Yanfei Guo
> Assistant Computer Scientist
> MCS Division, ANL
>
>
>
> On 11/22/17, 2:23 PM, "Carlos" <carlos at inf.ufpr.br> wrote:
>
> Is it possible to use mpich (3.3) with IPv6-only? We tried it here and got
>
> Fatal error in MPI_Init: Other MPI error, error stack:
> MPIR_Init_thread(506)..............:
> MPID_Init(211).....................: channel initialization failed
> MPIDI_CH3_Init(89).................:
> MPID_nem_init(324).................:
> MPID_nem_tcp_init(178).............:
> MPID_nem_tcp_get_business_card(425):
> ckpt_restart(384)..................: gethostbyname failed, zuratkul (errno
> 4)
>                                      *************
>
> This shows that mpich doesn't run without IPv4, which is our case... Is
> there a
> way to make it work in this situation?
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