Hi,
This is the command I'm using:

mpiexec.exe -machinefile machines.txt -env MPICH2_CHANNEL sock -n 2 cpi.exe

I have tried using both machine file and hosts in the command line, but I get the same results. The program runs on a single instance with any number of processors. I tried running mpiexec on one instance and using the other as a single host and that also works.

-Nicholas

On Fri, Feb 8, 2013 at 12:04 PM, Jayesh Krishna <jayesh@mcs.anl.gov> wrote:
Hi,
 How are you running your job (mpiexec command)? Did you try using a machine file to specify the hostnames when running the job?
 Does the program (cpi) execute correctly on a single ec2 instance?

Regards,
Jayesh

----- Original Message -----
From: "Nicholas Sgro" <nsgro060@gmail.com>
To: "Jayesh Krishna" <jayesh@mcs.anl.gov>
Sent: Thursday, February 7, 2013 9:57:55 PM
Subject: Re: [mpich-discuss] Amazon ec2 Windows machine

I'm using version 1.4.1p1. I tried the sock channel. It doesn't seem to work either. With sock, I get to the point where I enter the number of intervals, but then it does nothing.

Do you know any reason it wouldn't work with ec2 instances?



On Thu, Feb 7, 2013 at 4:29 PM, Jayesh Krishna < jayesh@mcs.anl.gov > wrote:


Hi,
Which version of MPICH2 are you using? Did you try the "sock" channel (See if it works)?

(PS: We haven't tested MPICH2 on Windows with ec2 instances.)
Regards,
Jayesh


----- Original Message -----
From: "Nicholas Sgro" < nsgro060@gmail.com >
To: discuss@mpich.org
Sent: Thursday, February 7, 2013 11:29:57 AM
Subject: [mpich-discuss] Amazon ec2 Windows machine


Hi all,

I am trying to run the example cpi.exe across 2 amazon ec2 instances running windows. I have different problems depending on the channel I choose. If I try nemesis, I get the following error:

Fatal error in MPI_Init: Other MPI error, error stack:
MPIR_Init_thread(392).................:
MPID_Init(139)........................: channel initialization failed
MPIDI_CH3_Init(38)....................:
MPID_nem_init(196)....................:
MPIDI_CH3I_Seg_commit(366)............:
MPIU_SHMW_Hnd_deserialize(324)........:
MPIU_SHMW_Seg_open(863)...............:
MPIU_SHMW_Seg_create_attach_templ(763): unable to allocate shared memory - OpenFileMapping The system cannot find the file specified.

If I try to use shm, cpi.exe uses 100% of the processors on both machines, but makes no progress and I have to cancel the job.

I am attaching logs from smpd from both machines from the runs with nemesis and shm.

I don't have any experience with mpich, so I have no idea what the problem is. Any guidance would be appreciated.

Thanks


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