checkpoint(7) [redhat man page]

CHECKPOINT(7)							   SQL Commands 						     CHECKPOINT(7)

NAME

       CHECKPOINT - force a transaction log checkpoint

SYNOPSIS

       CHECKPOINT

DESCRIPTION

       Write-Ahead  Logging  (WAL)  puts a checkpoint in the transaction log every so often. (To adjust the automatic checkpoint interval, see the
       run-time configuration options CHECKPOINT_SEGMENTS and CHECKPOINT_TIMEOUT.)  The CHECKPOINT command forces an immediate checkpoint when the
       command is issued, without waiting for a scheduled checkpoint.

       A  checkpoint  is  a point in the transaction log sequence at which all data files have been updated to reflect the information in the log.
       All data files will be flushed to disk. Refer to the PostgreSQL Administrator's Guide for more information about the WAL system.

       Only superusers may call CHECKPOINT. The command is not intended for use during normal operation.

SEE ALSO

       PostgreSQL Administrator's Guide

COMPATIBILITY

       The CHECKPOINT command is a PostgreSQL language extension.

SQL - Language Statements					    2002-11-22							     CHECKPOINT(7)

OMPI-CHECKPOINT(1)						     Open MPI							OMPI-CHECKPOINT(1)

NAME

       ompi-checkpoint, orte-checkpoint - Checkpoint a running parallel process using the Open MPI Checkpoint/Restart Service (CRS)

       NOTE:  ompi-checkpoint,	and orte-checkpoint are all exact synonyms for each other. Using any of the names will result in exactly identical
       behavior.

SYNOPSIS

       ompi-checkpoint [ options ] <PID_OF_MPIRUN>

Options
       orte-checkpoint will attempt to notify a running parallel job (identified by mpirun) that it has been requested	that  the  job	checkpoint
       itself. A global snapshot handle reference is presented to the user, which is used in ompi_restart to restart the job.

       <PID_OF_MPIRUN>
		 Process ID of the mpirun process.

       -h | --help
		 Display help for this command

       -w | --nowait
		 Do not wait for the application to finish checkpointing before returning.

       -s | --status
		 Display status messages regarding the progression of the checkpoint request.

       --term	 After checkpointing the running job, terminate it.

       -v | --verbose
		 Enable verbose output for debugging.

       -gmca | --gmca <key> <value>
		 Pass global MCA parameters that are applicable to all contexts. <key> is the parameter name; <value> is the parameter value.

       -mca | --mca <key> <value>
		 Send arguments to various MCA modules.

DESCRIPTION

       orte-checkpoint	can  be  invoked  multiple,  non-overlapping  times.  It is convenient to note that the user does not need to spectify the
       checkpointer to be used here, as that is determined completely by each of the running process in the job being checkpointed.

SEE ALSO

	 orte-ps(1), orte-clean(1), ompi-restart(1), opal-checkpoint(1), opal-restart(1), opal_crs(7)

1.4.5								   Feb 10, 2012 						OMPI-CHECKPOINT(1)