Openib; Openmpi - Red Hat ENTERPRISE LINUX 5.4 - TECHNICAL NOTES Manual

Chapter 4. Known Issues
insmod: error inserting '/lib/aes_generic.ko': -1 File exists
This message can safely be ignored.
• Installation using a Multiple Device (MD) RAID on top of multipath will result in a machine that
cannot boot. Multipath to Storage Area Network (SAN) devices which provide RAID internally are
(BZ#467469)
not affected.
The following note applies to s390x Architectures:
• When installing Red Hat Enterprise Linux 5.4, the following errors may be returned in
install.log:
Installing kernel-2.6.18-158.el5.s390x
cp: cannot stat `/sbin/dmraid.static': No such file or directory
This message can be safely ignored.

4.23. openib

The OpenFabrics Alliance Enterprise Distribution (OFED) is a collection of Infiniband and iWARP
hardware diagnostic utilities, the Infiniband fabric management daemon, Infiniband/iWARP kernel
module loader, and libraries and development packages for writing applications that use Remote
Direct Memory Access (RDMA) technology. Red Hat Enterprise Linux uses the OFED software stack
as its complete stack for Infiniband/iWARP/RDMA hardware support.
The following note applies to the ia64 Architectures:
• Running perftest will fail if different CPU speeds are detected. As such, you should disable CPU
speed scaling before running perftest.

4.24. openmpi

Open MPI, MVAPICH, and MVAPICH2 are all competing implementations of the Message Passing
Interface (MPI) standard. MVAPICH implements version 1 of the MPI standard, while Open MPI and
MVAPICH2 both implement the later, version 2 of the MPI standard.
• mvapich and mvapich2 in Red Hat Enterprise Linux 5 are compiled to support only InfiniBand/
iWARP interconnects. Consequently, they will not run over ethernet or other network interconnects.
97
(BZ#466390)
• When upgrading openmpi using yum, the following warning may be returned:
cannot open `/tmp/openmpi-upgrade-version.*' for reading: No such file or directory
The message is harmless and can be safely ignored.
• A bug in previous versions of openmpi and lam may prevent you from upgrading these packages.
This bug manifests in the following error (when attempting to upgrade openmpi or lam:
error: %preun(openmpi-[version]) scriptlet failed, exit status 2
308
(BZ#466296)
94
(BZ#433659)
93
96
98
(BZ#463919)