MAX_JOBID

Syntax

MAX_JOBID=integer

Description

The job ID limit. The job ID limit is the highest job ID that LSF will ever assign, and also the maximum number of jobs in the system.

By default, LSF assigns job IDs up to 6 digits, with the default value of the MAX_JOBID parameter in the lsb.params configuration file as 999999 jobs. With this default, no more than 999999 jobs can be in the system at once.

You cannot lower the job ID limit, but you can raise it to 10 digits (up to 2147483646 (for practical purposes, you can use any 10-digit integer less than this value)). This allows longer term job accounting and analysis, and means you can have more jobs in the system, and the job ID numbers will roll over less often.

Additionally, as of Fix Pack 14, with global job IDs enabled for jobs using the LSF multicluster capability, to maximize the number of available IDs, as a best practice, increase both the MAX_JOBID value in the lsb.params file (to 99999999) and the LSB_JOBID_DISP_LENGTH value in the lsf.conf file (to 8).

LSF assigns job IDs in sequence. When the job ID limit is reached, the count rolls over, so that the next job submitted is job ID "1" (if global job IDs is enabled, then the job ID is "1index"). If the original job 1 (or "1index") remains in the system, LSF skips that number and assigns job ID "2" (or "2index"), or the next available job ID. If you have so many jobs in the system that the low job IDs are still in use when the maximum job ID is assigned, jobs with sequential numbers could have totally different submission times.

Example

MAX_JOBID=125000000

Default

999999