10-07-2004
Apology accepted.
As for this thread, I'm not sure which job to mention.
I was a fortran programmer long before I ever heard of unix. And even some more recent programmers may have worked on other platfoms first.
But I guess that you asked for the first unix role. I was working on an HP 1000 running RTE 6. I was mostly an assembler programmer with a little fortran. We switched to C on Unix. I liked C, but I wasn't happy about leaving RTE. But I got over it.
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LEARN ABOUT DEBIAN
orte_snapc
ORTE_SNAPC(7) Open MPI ORTE_SNAPC(7)
NAME
ORTE_SNAPC - Open RTE MCA Snapshot Coordination (SnapC) Framework: Overview of Open RTE's SnapC framework, and selected modules. Open MPI
1.4.5
DESCRIPTION
Open RTE can coordinate the generation of a global snapshot of a parallel job from many distributed local snapshots. The components in this
framework determine how to: Initiate the checkpoint of the parallel application, gather together the many distributed local snapshots, and
provide the user with a global snapshot handle reference that can be used to restart the parallel application.
GENERAL PROCESS REQUIREMENTS
In order for a process to use the Open RTE SnapC components it must adhear to a few programmatic requirements.
First, the program must call ORTE_INIT early in its execution. This should only be called once, and it is not possible to checkpoint the
process without it first having called this function.
The program must call ORTE_FINALIZE before termination.
A user may initiate a checkpoint of a parallel application by using the orte-checkpoint(1) and orte-restart(1) commands.
AVAILABLE COMPONENTS
Open RTE ships with one SnapC component: full.
The following MCA parameters apply to all components:
snapc_base_verbose
Set the verbosity level for all components. Default is 0, or silent except on error.
snapc_base_global_snapshot_dir
The directory to store the checkpoint snapshots. Default is /tmp.
full SnapC Component
The full component gathers together the local snapshots to the disk local to the Head Node Process (HNP) before completing the checkpoint
of the process. This component does not currently support replicated HNPs, or timer based gathering of local snapshot data. This is a
3-tiered hierarchy of coordinators.
The full component has the following MCA parameters:
snapc_full_priority
The component's priority to use when selecting the most appropriate component for a run.
snapc_full_verbose
Set the verbosity level for this component. Default is 0, or silent except on error.
none SnapC Component
The none component simply selects no SnapC component. All of the SnapC function calls return immediately with ORTE_SUCCESS.
This component is the last component to be selected by default. This means that if another component is available, and the none component
was not explicity requested then ORTE will attempt to activate all of the available components before falling back to this component.
SEE ALSO
orte-checkpoint(1), orte-restart(1), opal-checkpoint(1), opal-restart(1), orte_filem(7), opal_crs(7)
1.4.5 Feb 10, 2012 ORTE_SNAPC(7)