Re: [OMPI users] Reducing Varying Length Arrays
Thanks Jeff, it solved the problem.
Saliya
On Sat, Nov 9, 2013 at 8:15 PM, Jeff Hammond wrote:
> MPI_{Gather,Allgather}v are appropriate for this. See docs for details.
>
> Jeff
>
> Sent from my iPhone
>
> On Nov 9, 2013, at 6:15 PM, Saliya Ekanayake wrote:
>
> Hi,
>
> I want to contact bunch of strings from MPI processes. For example, say
> with 2 processes,
>
> P1 has text "hi"
> P2 has text "world"
>
> I have these stored as char arrays in processes. Is there a simple way to
> do a reduce operation to concat these?
>
> Thank you,
> Saliya
>
> --
> Saliya Ekanayake esal...@gmail.com
> Cell 812-391-4914 Home 812-961-6383
> http://saliya.org
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>
> ___
> users mailing list
> us...@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
--
Saliya Ekanayake esal...@gmail.com
Cell 812-391-4914 Home 812-961-6383
http://saliya.org
[OMPI users] Problem running on multiple nodes with Java bindings
Hi, I'm having some strange problems running Open MPI(1.9a1r29559) with Java bindings on a Calxeda highbank ARM Server running Ubuntu 12.10 (GNU/Linux 3.5.0-43-highbank armv7l). The problem arises when I try to run a job on more than 3 nodes (I have a total of 8). Note: It's the same error for any of the node[0-7]. ubuntu@node0:~$ mpirun -np 4 -host node0,node1,node2 hostname Host key verification failed. ubuntu@node0:~$ mpirun -np 4 -host node0,node1,node2,node3 hostname node0 node0 node1 node2 and not running the job on the current node also gives Host key verification failed for only 3 nodes. ubuntu@node0:~$ mpirun -np 4 -host node1,node3,node5 hostname Host key verification failed. But not on 2 nodes: ubuntu@node0:~$ mpirun -np 4 -host node1,node3 hostname node1 node1 node3 node3 I've configured it with the following: ./configure --prefix=/opt/openmpi-1.9-java --without-openib --enable-static --with-threads=posix --enable-mpi-thread-multiple --enable-mpi-java --with-jdk-bindir=/usr/lib/jvm/java-7-openjdk-armhf/bin --with-jdk-headers=/usr/lib/jvm/java-7-openjdk-armhf/include I have Open MPI 1.6.5 (without Java-binding) installed and it runs without any problems on all nodes, so there should be no problem with SSH that the error points to. Any ideas? Regards, Christoffer
Re: [OMPI users] Problem running on multiple nodes with Java bindings
Add --enable-debug to your configure and run it with the following additional options --leave-session-attached -mca plm_base_verbose 5 Let's see where it fails during the launch phase. Offhand, the only thing that message means to me is that the ssh keys are botched on at least one node. Keep in mind that we use a tree-based launch, and so when you have more than two nodes, one or more of the intermediate nodes are executing an ssh. One way to see if that's the problem is to launch without the tree spawn: add -mca plm_rsh_no_tree_spawn 1 to your cmd line and see if it works. On Nov 10, 2013, at 9:24 AM, Christoffer Hamberg wrote: > Hi, > > I'm having some strange problems running Open MPI(1.9a1r29559) with Java > bindings on a Calxeda highbank ARM Server running Ubuntu 12.10 (GNU/Linux > 3.5.0-43-highbank armv7l). > > The problem arises when I try to run a job on more than 3 nodes (I have a > total of 8). > Note: It's the same error for any of the node[0-7]. > > ubuntu@node0:~$ mpirun -np 4 -host node0,node1,node2 hostname > Host key verification failed. > > ubuntu@node0:~$ mpirun -np 4 -host node0,node1,node2,node3 hostname > node0 > node0 > node1 > node2 > > and not running the job on the current node also gives Host key verification > failed for only 3 nodes. > > ubuntu@node0:~$ mpirun -np 4 -host node1,node3,node5 hostname > Host key verification failed. > > But not on 2 nodes: > ubuntu@node0:~$ mpirun -np 4 -host node1,node3 hostname > node1 > node1 > node3 > node3 > > I've configured it with the following: > ./configure --prefix=/opt/openmpi-1.9-java --without-openib --enable-static > --with-threads=posix --enable-mpi-thread-multiple --enable-mpi-java > --with-jdk-bindir=/usr/lib/jvm/java-7-openjdk-armhf/bin > --with-jdk-headers=/usr/lib/jvm/java-7-openjdk-armhf/include > > I have Open MPI 1.6.5 (without Java-binding) installed and it runs without > any problems on all nodes, so there should be no problem with SSH that the > error points to. > > Any ideas? > > Regards, > Christoffer > ___ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
