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qhold / qrls - hold/release batch jobs

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The qhold command is essentially a special case of the qalter command.

Command qhold puts a job, which hasn't been started yet on hold so that it will not be  scheduled for execution by the SGE till the hold is removed. Requires the job-id as argument.  qrls command releases the job

A hold is placed on a batch job by a request to the batch server that manages the batch job. A batch job that has one or more holds is not eligible for execution. The qhold  utility is a user-accessible client of batch services that requests one or more types of hold to be placed on one or more batch jobs.

The qhold  utility allows users to place a hold on one or more jobs. A hold makes a batch job ineligible for execution.

The qhold  utility has options that allow the user to specify the type of hold. Should the user wish to place a hold on a set of jobs that meet a selection criteria, such a list of jobs can be acquired using the qselect  utility.

The option -h  allows the user to specify the type of hold that is to be placed on the job. This option allows for USER, SYSTEM, OPERATOR, and implementation-defined hold types. The USER and OPERATOR holds are distinct. The batch server that manages the batch job will verify that the user is authorized to set the specified hold for the batch job.

Mail is not required on hold because the administrator has the tools and libraries to build this option if he or she wishes. Historically, the qhold  utility has been a part of some existing batch systems

The qhold  utility shall place holds on batch jobs in the order in which their batch job_identifiers are presented to the utility. If the qhold  utility fails to process any batch job_identifier  successfully, the utility shall proceed to process the remaining batch job_identifiers, if any.

The qhold  utility shall place holds on each batch job by sending a Hold Job Request  to the batch server that manages the batch job.

The qhold  utility shall not exit until holds have been placed on the batch job corresponding to each successfully processed batch job_identifier.

qhold [-h hold_list] job_identifier  ...

Options

The qhold  utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.

The following option shall be supported by the implementation:

For each unique character in the hold_list  option-argument, the qhold  utility shall add a value to the Hold_Types  attribute of the batch job as follows, each representing a different hold type:

If any of these characters are duplicated in the hold_list  option-argument, the duplicates shall be ignored.

An existing Hold_Types  attribute can be cleared by the following hold type:

n NO_HOLD

The qhold  utility shall consider it an error if any hold type other than 'n' is combined with hold type 'n' .

Strictly conforming applications shall not repeat any of the characters 'u', 's', 'o', or 'n' within the hold_list  option-argument. The qhold  utility shall permit the repetition of characters, but shall not assign additional meaning to the repeated characters.

An implementation may define other hold types. The conformance document for an implementation shall describe any additional hold types, how they are specified, their internal behavior, and how they affect the behavior of the utility.

If the -h option is not presented to the qhold  utility, the implementation shall set the Hold_Types  attribute to USER.

Operands

The qhold  utility shall accept one or more operands that conform to the syntax for a batch job_identifier  (see Batch Job Identifier  ).

Stdin is not used.

There are no input files

Environment Variables

The following environment variables shall affect the execution of qhold:

The standard error shall be used only for diagnostic messages.

Exit Status

The following exit values shall be returned:

Consequences of Errors

In addition to the default behavior, the qhold  utility shall not be required to write a diagnostic message to standard error when the error reply received from a batch server indicates that the batch job_identifier  does not exist on the server. Whether or not the qhold  utility waits to output the diagnostic message while attempting to locate the job on other servers is implementation-defined.

Copyright

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright © 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html

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qhold/qrls

Once a job has been submitted, there are times when you may want to suspend or stop a job outright. Perhaps the job depends on data that hasn't finished uploading yet, whatever the reason, SGE provides you with the qhold tool for that.

qhold 28780 

Specifically, when you issue a hold on a job you are setting a user hold on the job. There are also system and operator holds, but you'll only be setting user holds, which you implicitely set. To explicitely set a user hold, specify:

login3% qhold -h u 28780
job-ID  prior   name       user         state submit/start at     queue                          slots ja-task-ID
-----------------------------------------------------------------------------------------------------------------
  28780 0.00000 testJob    username     hqw  02/25/2008 07:56:57

We can see that the state has changed from the queued state (qw) to a held state (hqw). At this point, we have two options, either we are ready for the job to continue, or we want delete the job. For these two sitations, we use the qrls (release) and qdel commands.

login3% qrls -h u 28780
modified hold of job 28780
login3% qdel 28785
userName has deleted job 28785

There are situations where qdel won't work, and won't delete the job. For instance, if a node lit on fire while running your job, you won't be able to delete that job. qdel will send a signal to the daemon (ge_execd) to delete the job, but won't get a response. In this case, the only way to delete the job will be to add the -f (force) option to qdel. This tells the scheduler to not wait for confirmation from the node, you should only use this option when you have to!

Show only job that are not on hold in qstat

I'm running some jobs on an SGE cluster. Is there a way to make qstat show me only jobs that are not on hold?

qstat -s p shows pending jobs, which is all those with state "qw" and "hqw".

qstat -s h shows hold jobs, which is all those with state "hqw".

I want to be able to see all jobs with state "qw" only and NOT state "hqw". The man pages seem to suggest it isn't possible, but I want to be sure I didn't miss something. It would be REALLY useful and it's really frustrating me that I can't make it work.

Other cluster users have a few thousand jobs on hold ("hqw") and only a handful actually in the queue waiting to run ("qw"). I want to see quickly and easily the stuff that is not on hold so I can see where my jobs are in the queue. It's a pain to have to show everything and then scroll back up to find the relevant part of the output.

sungridengine


share|improve this question

asked Feb 14 at 23:08

Laura

===

So I figured out a way to show what I want by piping the output of qstat into grep:
qstat -u "*" | grep " qw"

(Note that I need to search for " qw" not just "qw" or it will return the "hqw" states as well.)

But I'd still love to know if it's possible using qstat options only.


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