Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Sounds about right. I'm not near a keyboard to check the reasons why pipe(2) would fail. Specifically, OMPI is failing when it is trying to setup stdin/stdout/stderr forwarding for your job. Very strange. Sent from my PDA. No type good. On Feb 11, 2011, at 9:56 PM, "Tena Sakai"

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Hi Gus, Thank you for your tips. I didn't find any smoking gun or anything comes close. Here's the upshot: [tsakai@ip-10-114-239-188 ~]$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Hi Tena Please read one answer inline. Tena Sakai wrote: Hi Jeff, Hi Gus, Thanks for your replies. I have pretty much ruled out PATH issues by setting tsakai's PATH as identical to that of root. In that setting I reproduced the same result as before: root can run mpirun correctly and tsakai

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Hi Jeff, Hi Gus, Thanks for your replies. I have pretty much ruled out PATH issues by setting tsakai's PATH as identical to that of root. In that setting I reproduced the same result as before: root can run mpirun correctly and tsakai cannot. I have also checked out permission on /tmp

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

It is concerning if the pipe system call fails - I can't think of why that would happen. Thats not usually a permissions issue but rather a deeper indication that something is either seriously wrong on your system or you are running out of file descriptors. Are file descriptors limited on a

Re: [OMPI users] Totalview not showing main program on startup with OpenMPI 1.3.x and 1.4.x

Hi Terry, Someone else at the University builds the packages that I use, and we've been experimenting for the last few days with different openmpi build options to see what might be causing this. Re the stack, I can always see the entire stack in the TV stack pane, and I can always click on

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Hi Tena Since root can but you can't, is is a directory permission problem perhaps? Check the execution directory permission (on both machines, if this is not NFS mounted dir). I am not sure, but IIRR OpenMPI also uses /tmp for under-the-hood stuff, worth checking permissions there also. Just a

Re: [OMPI users] Collective comminucation API

there is alltoall, scatter, gather, and many more. check out https://computing.llnl.gov/tutorials/mpi/#Collective_Communication_Routines On Fri, Feb 11, 2011 at 3:26 AM, Bibrak Qamar wrote: > I want to know, if there is any other implementation of collective > communication (

Re: [OMPI users] libmpi.so.0 not found during gdb debugging

swagat mishra wrote: > hello everyone, > i have a network of systems connected over lan with each computer > running ubuntu. openmpi 1.4.x is installed on 1 machine and the > installation is mounted on other nodes through Networking File > System(NFS). the source program and compiled file(a.out)

[OMPI users] MPI_Win_create with size=0 expose memory anyway

Hi all, I am testing the one-sided message passing (MPI_Put, MPI_Get) and it seems to me that the size parameter of MPI_Win_create() is definitly not taken into account. Then I can put/get messages using a window created with size=0 (or put/get after any others limits between 0 and the original

Re: [OMPI users] Totalview not showing main program on startup with OpenMPI 1.3.x and 1.4.x

Sorry I have to ask this, did you build your lastest OMPI version, not just the application, with the -g flag too. IIRC, when I ran into this issue I was actually able to do stepi's and eventually pop up the stack however that is really no way to debug a program :-). Unless OMPI is somehow

[OMPI users] Collective comminucation API

I want to know, if there is any other implementation of collective communication ( reduce and Bcast) available apart from what openMPI provides. Thanks Bibrak Qamar Undergraduate Student BIT-9 Member Center for High Performance Scientific Computing NUST-School of Electrical Engineering and

Re: [OMPI users] runtime error

Excuse me. I forgot the attaching. 2011/2/11 Marcela Castro León > Hello: > > I've the same version ob Ubuntu 10.04. The original version was Ubuntu > Server 9.1 (64) and upgraded both of them to 10.04. > Yesterday I've updated and upgraded to the same level again. But I've

Re: [OMPI users] runtime error

Hello: I've the same version ob Ubuntu 10.04. The original version was Ubuntu Server 9.1 (64) and upgraded both of them to 10.04. Yesterday I've updated and upgraded to the same level again. But I've got the same error after that. The machine are exactly the same, HP Compaq with inter Core I5.

Re: [OMPI users] How does authentication between nodes work without password? (Newbie alert on)

Hi, I have made a bit more progress. I think I can say ssh authenti- cation problem is behind me now. I am still having a problem running mpirun, but the latest discovery, which I can reproduce, is that I can run mpirun as root. Here's the session log: [tsakai@vixen ec2]$ 2ec2