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lam: The LAM (Local Area Multicomputer) programming environment.
- Summary
- LAM (Local Area Multicomputer) is an Message-Passing Interface (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 one parallel
computer to solve one problem. LAM/MPI is considered to be "cluster
friendly" because 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 (different RPMs
are supplied for this -- see the main LAM website at
http://www.mpi.nd.edu/lam/ for details).<
LAM features a full implementation of MPI version 1 (with the
exception that LAM does not support cancelling of sends), and much of
version 2. Compliant applications are source code portable between LAM
and any other implementation of MPI. In addition to meeting the
standard, LAM/MPI offers extensive monitoring capabilities to support
debugging. Monitoring happens on two levels: On one level, LAM/MPI has
the hooks to allow a snapshot of a process and message status to be
taken at any time during an application run. The status includes all
aspects of synchronization plus datatype map/signature, communicator
group membership and message contents (see the XMPI application on the
main LAM website). On the second level, the MPI library can produce a
cumulative record of communication, which can be visualized either at
runtime or post-mortem.
Changelog
- * Thu Apr 3 17:00:00 2008 Doug Ledford <dledford{%}redhat{*}com> - 2:7.1.2-14
- Oops, I had the post/preun scripts attached to the -libs packages, while
the mpivars.* files mpi-selector needed was installed in the base
package. This presented a race condition where the mpivars.* files might
or might not be present by the time the post script ran. We attach to the
right package now.
- Resolves: bz440397
- Related: bz428199
- * Wed Apr 2 17:00:00 2008 Doug Ledford <dledford{%}redhat{*}com> - 2:7.1.2-12
- Convert over to use mpi-selector and resolve the alternatives links
issue once and for all
- Related: bz428199
- * Tue Feb 12 16:00:00 2008 Doug Ledford <dledford{%}redhat{*}com> - 2:7.1.2-11
- On upgrade we loose our alternatives links. This is because of a bug in
the previous lam package. Correct our pre/post scripts so the bug will
no longer exist, but it will require running upgrade twice in order to
recreate the missing alternatives links.