HP-MPI Version 2.2 for Linux Release Note

HP-MPI V2.2 for Linux Release Note

What’s in This Version

HP-MPI 2.2 for Linux includes the following new environment variables:

• MPI_RDMA_MSGSIZE

• MPI_RDMA_NENVELOPE

• MPI_RDMA_NSRQRECV

• MPI_RDMA_NFRAGMENT

• MPI_RDMA_NONESIDED

• MPI_MAX_REMSH

• MPI_VAPI_QPPARAMS

• MPI_RANKMEMSIZE

• MPI_ICLIB_MX

Description of Features

The following section provides brief descriptions of the new features included in this release.

For more information on HP-MPI, refer to the HP-MPI User’s Guide available at

http://docs.hp.com.

SilverStorm InfiniBand support

HP-MPI 2.2 supports SilverStorm InfiniBand via the uDAPL layer. To use SilverStorm

InfiniBand:

% mpirun -UDAPL -f appfile <mpirun options>

Verify your system has /lib in /etc/ld.so.conf and that ldconfig was run by root after it

was added. If /etc/ld.so.conf is missing the entry, add the following arguments to the

mpirun command line:

% mpirun -UDAPL -e MPI_ICLIB_UDAPL=/lib/libdat.so -e MPI_HASIC-UDAPL=1

The SilverStorm uDAPL driver has an accumulating issue. If the system has been running for

more than 24 hours, and a large enough number of applications have been run, new

applications could have problems establishing new uDAPL connections. The error occurs

depending on the usage of the system. If this error occurs, reboot the system.

ssh as default remote shell

HP-MPI 2.2 defaults to using ssh as the remote shell capability for launching MPI ranks

across nodes.

We recommend that ssh users set 'StrictHostKeyChecking=no' in their ~/.ssh/config.