condor_update_machine_ad man page

condor_update_machine_ad update a machine ClassAd


condor_update_machine_ad [ -help -version ]

condor_update_machine_ad [ -pool centralmanagerhostname[:portnumber] ] [ -name startdname ] path/to/update-ad


condor_update_machine_ad modifies the specified condor_startd daemon's machine ClassAd. The ClassAd in the file given by  path/to/update-ad represents the changed attributes. The changes persists until the condor_startd restarts. If no file is specified on the command line, condor_update_machine_ad reads the update ClassAd from  stdin .

Contents of the file or  stdin must contain a complete ClassAd. Each line must be terminated by a newline character, including the last line of the file. Lines are of the form

<attribute> = <value>

Changes to certain ClassAd attributes will cause the condor_startd to regenerate values for other ClassAd attributes. An example of this is setting  HasVM . This will cause  OfflineUniverses ,  VMOfflineTime , and  VMOfflineReason to change.


Display usage information and exit
Display the HTCondor version and exit
-pool centralmanagerhostname[:portnumber]
Specify a pool by giving the central manager's host name and an optional port number
-name startdname
Send the command to a machine identified by startdname

General Remarks

This tool is intended for the use of system administrators when dealing with offline universes.


To re-enable matching with the VM universe jobs, place on  stdin a complete ClassAd (including the ending newline character) to change the value of ClassAd attribute  HasVM :

echo "HasVM = True
" | condor_update_machine_ad

To prevent vm universe jobs from matching with the machine:

echo "HasVM = False
" | condor_update_machine_ad

To prevent vm universe jobs from matching with the machine and specify a reason:

echo "HasVM = False
VMOfflineReason = \"Cosmic rays.\"
" | condor_update_machine_ad

Note that the quotes around the reason are required by ClassAds, and they must be escaped because of the shell. Using a file instead of  stdin may be preferable in these situations, because neither quoting nor escape characters are needed.

Exit Status

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


Center for High Throughput Computing, University of Wisconsin-Madison