HP-MPI Version 2.0 for Windows Release Note

2 New or Changed Features
HP-MPI V2.0 for Windows includes the following new or changed features. For more information,
refer to the manpages in C:\Program Files (x86)\Hewlett-Packard\HP-MPI\man.
2.1 Improved Startup Performance
HP-MPI V2.0 for Windows has greatly improved startup and shutdown time for HP-MPI jobs.
These improvements are for both HPC submitted jobs and Windows XP/Vista/2003/2008 jobs
using the HP-MPI Remote Launch service. Job launch and shutdown scales well to 1024 nodes.
2.2 Improved Shared Memory Performance
HP-MPI V2.0 for Windows has improved shared memory performance for intranode ranks.
HP-MPI continues to perform well for latency with shared memory.
2.3 Improved MPI-2 Standard Compliance
HP-MPI V2.0 for Windows is MPI-2 compliant. HP-MPI now supports dynamic processes via
-spawn.
2.4 HPC Support
HP-MPI V2.0 for Windows supports automatic scheduling for HPCS 2008 with hostfile, appfile,
and hostlist modes..
IMPORTANT: Because the Microsoft HPC Scheduler API is no longer compatible with Windows
CCS, HP-MPI V2.0 for Windows does not support Windows CCS. For older Windows CCS
clusters, use HP-MPI V1.1.
2.5 WinOF 2.0 Drivers
HP-MPI V2.0 for Windows supports the current WinOF 2.0 drivers which are the only supported
InfiniBand drivers for Windows HPC Server 2008. HP-MPI V2.0 for Windows does not support
legacy drivers for Windows CCS (for example, Voltaire 2.2.493.409).
HP-MPI V2.0 for Windows also supports RDMA plugins for InfiniBand drivers. Future InfiniBand
drivers will require a new RDMA plugin for HP-MPI, but will not require a re-release of HP-MPI
to support new drivers. This allows HP-MPI to support multiple versions of InfiniBand drivers
by releasing new RDMA plugins as new WinOF drivers are released.
2.6 Dual Rail Support
HP-MPI V2.0 for Windows supports dual rail on InfiniBand.
2.7 Improved Error Messaging
HP-MPI V2.0 provides improved service errors reporting. Previous versions reported service
activity to the system event logs only. HP-MPI V2.0 still reports service activity to the event logs,
but now also reports errors back to the mpirun process, and displays detailed error information
when remote startup failures occur.
2.1 Improved Startup Performance 11