# condor_dagman¶

meta scheduler of the jobs submitted as the nodes of a DAG or DAGs

## Synopsis¶

condor_dagman -f -t -l . -help

condor_dagman -version

condor_dagman -f -l . -csdversion version_string [-debug level] [-maxidle numberOfProcs] [-maxjobs numberOfJobs] [-maxpre NumberOfPreScripts] [-maxpost NumberOfPostScripts] [-noeventchecks ] [-allowlogerror ] [-usedagdir ] -lockfile filename [-waitfordebug ] [-autorescue 0|1] [-dorescuefrom number] [-allowversionmismatch ] [-DumpRescue ] [-verbose ] [-force ] [-notification value] [-suppress_notification ] [-dont_suppress_notification ] [-dagman DagmanExecutable] [-outfile_dir directory] [-update_submit ] [-import_env ] [-priority number] [-dont_use_default_node_log ] [-DontAlwaysRunPost ] [-AlwaysRunPost ] [-DoRecovery ] -dag dag_file [-dag dag_file_2-dag dag_file_n ]

## Description¶

condor_dagman is a meta scheduler for the HTCondor jobs within a DAG (directed acyclic graph) (or multiple DAGs). In typical usage, a submitter of jobs that are organized into a DAG submits the DAG using condor_submit_dag. condor_submit_dag does error checking on aspects of the DAG and then submits condor_dagman as an HTCondor job. condor_dagman uses log files to coordinate the further submission of the jobs within the DAG.

All command line arguments to the DaemonCore library functions work for condor_dagman. When invoked from the command line, condor_dagman requires the arguments -f -l . to appear first on the command line, to be processed by DaemonCore. The csdversion must also be specified; at start up, condor_dagman checks for a version mismatch with the condor_submit_dag version in this argument. The -t argument must also be present for the -help option, such that output is sent to the terminal.

Arguments to condor_dagman are either automatically set by condor_submit_dag or they are specified as command-line arguments to condor_submit_dag and passed on to condor_dagman. The method by which the arguments are set is given in their description below.

condor_dagman can run multiple, independent DAGs. This is done by specifying multiple -dag a rguments. Pass multiple DAG input files as command-line arguments to condor_submit_dag.

Debugging output may be obtained by using the -debug level option. Level values and what they produce is described as

• level = 0; never produce output, except for usage info
• level = 1; very quiet, output severe errors
• level = 2; normal output, errors and warnings
• level = 3; output errors, as well as all warnings
• level = 4; internal debugging output
• level = 5; internal debugging output; outer loop debugging
• level = 6; internal debugging output; inner loop debugging; output DAG input file lines as they are parsed
• level = 7; internal debugging output; rarely used; output DAG input file lines as they are parsed

## Options¶

-help
Display usage information and exit.
-version
Display version information and exit.
-debug level
An integer level of debugging output. level is an integer, with values of 0-7 inclusive, where 7 is the most verbose output. This command-line option to condor_submit_dag is passed to condor_dagman or defaults to the value 3.
-maxidle NumberOfProcs
Sets the maximum number of idle procs allowed before condor_dagman stops submitting more node jobs. Note that for this argument, each individual proc within a cluster counts as a towards the limit, which is inconsistent with -maxjobs . Once idle procs start to run, condor_dagman will resume submitting jobs once the number of idle procs falls below the specified limit. NumberOfProcs is a non-negative integer. If this option is omitted, the number of idle procs is limited by the configuration variable DAGMAN_MAX_JOBS_IDLE (see Configuration File Entries for DAGMan), which defaults to 1000. To disable this limit, set NumberOfProcs to 0. Note that submit description files that queue multiple procs can cause the NumberOfProcs limit to be exceeded. Setting queue 5000 in the submit description file, where -maxidle is set to 250 will result in a cluster of 5000 new procs being submitted to the condor_schedd, not 250. In this case, condor_dagman will resume submitting jobs when the number of idle procs falls below 250.
-maxjobs NumberOfClusters
Sets the maximum number of clusters within the DAG that will be submitted to HTCondor at one time. Note that for this argument, each cluster counts as one job, no matter how many individual procs are in the cluster. NumberOfClusters is a non-negative integer. If this option is omitted, the number of clusters is limited by the configuration variable DAGMAN_MAX_JOBS_SUBMITTED (see Configuration File Entries for DAGMan), which defaults to 0 (unlimited).
-maxpre NumberOfPreScripts
Sets the maximum number of PRE scripts within the DAG that may be running at one time. NumberOfPreScripts is a non-negative integer. If this option is omitted, the number of PRE scripts is limited by the configuration variable DAGMAN_MAX_PRE_SCRIPTS (see Configuration File Entries for DAGMan), which defaults to 20.
-maxpost NumberOfPostScripts
Sets the maximum number of POST scripts within the DAG that may be running at one time. NumberOfPostScripts is a non-negative integer. If this option is omitted, the number of POST scripts is limited by the configuration variable DAGMAN_MAX_POST_SCRIPTS (see Configuration File Entries for DAGMan), which defaults to 20.
-noeventchecks
This argument is no longer used; it is now ignored. Its functionality is now implemented by the DAGMAN_ALLOW_EVENTS configuration variable.
-allowlogerror
As of verson 8.5.5 this argument is no longer supported, and setting it will generate a warning.
-usedagdir
This optional argument causes condor_dagman to run each specified DAG as if the directory containing that DAG file was the current working directory. This option is most useful when running multiple DAGs in a single condor_dagman.
-lockfile filename
Names the file created and used as a lock file. The lock file prevents execution of two of the same DAG, as defined by a DAG input file. A default lock file ending with the suffix .dag.lock is passed to condor_dagman by condor_submit_dag.
-waitfordebug
This optional argument causes condor_dagman to wait at startup until someone attaches to the process with a debugger and sets the wait_for_debug variable in main_init() to false.
-autorescue 0|1
Whether to automatically run the newest rescue DAG for the given DAG file, if one exists (0 = false, 1 = true).
-dorescuefrom number
Forces condor_dagman to run the specified rescue DAG number for the given DAG. A value of 0 is the same as not specifying this option. Specifying a nonexistent rescue DAG is a fatal error.
-allowversionmismatch
This optional argument causes condor_dagman to allow a version mismatch between condor_dagman itself and the .condor.sub file produced by condor_submit_dag (or, in other words, between condor_submit_dag and condor_dagman). WARNING! This option should be used only if absolutely necessary. Allowing version mismatches can cause subtle problems when running DAGs. (Note that, starting with version 7.4.0, condor_dagman no longer requires an exact version match between itself and the .condor.sub file. Instead, a “minimum compatible version” is defined, and any .condor.sub file of that version or newer is accepted.)
-DumpRescue
This optional argument causes condor_dagman to immediately dump a Rescue DAG and then exit, as opposed to actually running the DAG. This feature is mainly intended for testing. The Rescue DAG file is produced whether or not there are parse errors reading the original DAG input file. The name of the file differs if there was a parse error.
-verbose
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) Cause condor_submit_dag to give verbose error messages.
-force
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) Require condor_submit_dag to overwrite the files that it produces, if the files already exist. Note that dagman.out will be appended to, not overwritten. If new-style rescue DAG mode is in effect, and any new-style rescue DAGs exist, the -force flag will cause them to be renamed, and the original DAG will be run. If old-style rescue DAG mode is in effect, any existing old-style rescue DAGs will be deleted, and the original DAG will be run. See the HTCondor manual section on Rescue DAGs for more information.
This argument is only included to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs. Sets the e-mail notification for DAGMan itself. This information will be used within the HTCondor submit description file for DAGMan. This file is produced by condor_submit_dag. The notification option is described in the condor_submit manual page.
Causes jobs submitted by condor_dagman to not send email notification for events. The same effect can be achieved by setting the configuration variable DAGMAN_SUPPRESS_NOTIFICATION to True. This command line option is independent of the -notification command line option, which controls notification for the condor_dagman job itself. This flag is generally superfluous, as DAGMAN_SUPPRESS_NOTIFICATION defaults to True.
Causes jobs submitted by condor_dagman to defer to content within the submit description file when deciding to send email notification for events. The same effect can be achieved by setting the configuration variable DAGMAN_SUPPRESS_NOTIFICATION to False. This command line flag is independent of the -notification command line option, which controls notification for the condor_dagman job itself. If both -dont_suppress_notification and -suppress_notification are specified within the same command line, the last argument is used.
-dagman DagmanExecutable
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) Allows the specification of an alternate condor_dagman executable to be used instead of the one found in the user’s path. This must be a fully qualified path.
-outfile_dir directory
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) Specifies the directory in which the .dagman.out file will be written. The directory may be specified relative to the current working directory as condor_submit_dag is executed, or specified with an absolute path. Without this option, the .dagman.out file is placed in the same directory as the first DAG input file listed on the command line.
-update_submit
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) This optional argument causes an existing .condor.sub file to not be treated as an error; rather, the .condor.sub file will be overwritten, but the existing values of -maxjobs, -maxidle, -maxpre, and -maxpost will be preserved.
-import_env
(This argument is included only to be passed to condor_submit_dag if lazy submit file generation is used for nested DAGs.) This optional argument causes condor_submit_dag to import the current environment into the environment command of the .condor.sub file it generates.
-priority number
Sets the minimum job priority of node jobs submitted and running under this condor_dagman job.
-dont_use_default_node_log
This option is disabled as of HTCondor version 8.3.1. Tells condor_dagman to use the file specified by the job ClassAd attribute UserLog to monitor job status. If this command line argument is used, then the job event log file cannot be defined with a macro.
-DontAlwaysRunPost
This option causes condor_dagman to not run the POST script of a node if the PRE script fails. (This was the default behavior prior to HTCondor version 7.7.2, and is again the default behavior from version 8.5.4 onwards.)
-AlwaysRunPost
This option causes condor_dagman to always run the POST script of a node, even if the PRE script fails. (This was the default behavior for HTCondor version 7.7.2 through version 8.5.3.)
-DoRecovery
Causes condor_dagman to start in recovery mode. This means that it reads the relevant job user log(s) and catches up to the given DAG’s previous state before submitting any new jobs.
-dag filename
filename is the name of the DAG input file that is set as an argument to condor_submit_dag, and passed to condor_dagman.

## Exit Status¶

condor_dagman will exit with a status value of 0 (zero) upon success, and it will exit with the value 1 (one) upon failure.

## Examples¶

condor_dagman is normally not run directly, but submitted as an HTCondor job by running condor_submit_dag. See the condor_submit_dag manual page for examples.