Description:

LAM (Local Area Multicomputer) is an MPI programming environment and
development system for heterogeneous computers on a network. With
LAM/MPI, a dedicated cluster or an existing network computing
infrastructure can act as a single parallel computer. LAM/MPI is
considered to be "cluster friendly", in that it offers daemon-based
process startup/control as well as fast client-to-client message
passing protocols. LAM/MPI can use TCP/IP and/or shared memory for
message passing (currently, different RPMs are supplied for this --
see the main LAM web site for details).

LAM features a full implementation of MPI-1 (with the exception that
LAM does not support cancelling of sends), and much of MPI-2.
Compliant applications are source code portable between LAM/MPI and
any other implementation of MPI. In addition to providing a
high-quality implementation of the MPI standard, LAM/MPI offers
extensive monitoring capabilities to support debugging. Monitoring
happens on two levels. First, LAM/MPI has the hooks to allow a
snapshot of process and message status to be taken at any time during
an application run. This snapshot includes all aspects of
synchronization plus datatype maps/signatures, communicator group
membership, and message contents (see the XMPI application on the main
LAM web site). On the second level, the MPI library is instrumented to
produce a cummulative record of communication, which can be visualized
either at runtime or post-mortem.