What is this `job_desc_msg_t` format that I need to submit jobs to SLURM via the Perl API?

问题

The Perl API for SLURM indicates that to submit a job with the API requires that we give it a "job description" ($job_desc or $job_desc_msg), which has the structure job_desc_msg_t but it doesn't tell what job_desc_msg_t is.

I found it in slurm.h starting at line 1160, so I'm guessing that I will need to pass in a hash with a similar structure. I plan to play with it and post an answer later today or tomorrow, once I've had a chance to try it out.

回答1:

That's exactly what you must do according to the man page.

Typicaly, C structures are converted to (maybe blessed) Perl hash references, with field names as hash keys. Arrays in C are converted to arrays in Perl. For example, there is a structure "job_info_msg_t":
typedef struct job_info_msg {
    time_t last_update;     /* time of latest info */
    uint32_t record_count;  /* number of records */
    job_info_t *job_array;  /* the job records */
} job_info_msg_t;
This will be converted to a hash reference with the following structure:
{
    last_update => 1285847672,
    job_array => [ {account => 'test', alloc_node => 'ln0', alloc_sid => 1234, ...},
                   {account => 'debug', alloc_node => 'ln2', alloc_sid => 5678, ...},
                   ...
                 ]
}
Note the missing of the "record_count" field in the hash. It can be derived from the number of elements in array "job_array".

To pass parameters to the API functions, use the corresponding hash references, for example:
$rc = $slurm->update_node({node_names => 'node[0-7]', node_state => NODE_STATE_DRAIN});
Please see "<slurm/slurm.h>" for the definition of the structures.

来源：https://stackoverflow.com/questions/30079725/what-is-this-job-desc-msg-t-format-that-i-need-to-submit-jobs-to-slurm-via-the

标签

perl

slurm