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NAME
Open MPI MCA Checkpoint/Restart Coordination Protocol (CRCP) Framework
- Overview of Open MPI's CRCP framework, and selected modules. Open
MPI 1.3.4
DESCRIPTION
The CRCP Framework is used by Open MPI for the encapsulation of various
Checkpoint/Restart Coordination Protocols (e.g., Coordinated, Uncoordi-
nated, Message/Communication Induced, ...).
GENERAL PROCESS REQUIREMENTS
In order for a process to use the Open MPI CRCP components it must
adhear to a few programmatic requirements.
First, the program must call MPI_INIT early in its execution.
The program must call MPI_FINALIZE before termination.
A user may initiate a checkpoint of a parallel application by using the
ompi-checkpoint(1) and ompi-restart(1) commands.
AVAILABLE COMPONENTS
Open MPI currently ships with one CRCP component: coord.
The following MCA parameters apply to all components:
crcp_base_verbose
Set the verbosity level for all components. Default is 0, or silent
except on error.
coord CRCP Component
The coord component implements a Coordinated Checkpoint/Restart Coordi-
nation Protocol similar to the one implemented in LAM/MPI.
The coord component has the following MCA parameters:
crcp_coord_priority
The component's priority to use when selecting the most appropriate
component for a run.
crcp_coord_verbose
Set the verbosity level for this component. Default is 0, or silent
except on error.
none CRCP Component
The none component simply selects no CRCP component. All of the CRCP
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 Open MPI will attempt to activate all
of the available components before falling back to this component.
SEE ALSO
ompi-checkpoint(1), ompi-restart(1), opal-checkpoint(1), opal-
restart(1), orte_snapc(7), orte_filem(7), opal_crs(7)
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