NAME¶
OMPI_CRCP - Open MPI MCA Checkpoint/Restart Coordination Protocol (CRCP)
Framework: Overview of Open MPI's CRCP framework, and selected modules. Open
MPI 1.6.5
DESCRIPTION¶
The CRCP Framework is used by Open MPI for the encapsulation of various
Checkpoint/Restart Coordination Protocols (e.g., Coordinated, Uncoordinated,
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
Coordination 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)